Electron microprobe analysis of apatite for major and minor element geochemistry. Apatite is the main rare earth element host in these deposits. Data are provided in CSV format.

Methods used to create several styles for lithology or geologic time, including style files for Lithclass lithologic categories, and ISC and DNAG timescales.

Field notes, locations, rock descriptions, and geochemical analyses from a 1988 to 1994 study to facilitate new research efforts in IOCG (iron-oxide deposits in context with other iron oxide-copper ± uranium) deposit types.

A descriptive compilation of 545 zinc, lead, and barium districts, deposits, and occurrences in Paleozoic sedimentary rocks in the eastern midwest states.

Miocene calc-alkaline volcanic rocks, part of the southern segment of the ancestral Cascades magmatic arc, are spatially, temporally, and likely genetically associated with precious metal epithermal deposits in the Tonopah, Divide, and Goldfield Districts

Nd and Pb isotopic analyses from stratigraphic sampling from Somma-Vesuvius volcanic complex, Italy, during the last 3550 years point to contributions from heterogeneous lithosphere, continental crust, and magma mixing.

Chemical analyses for 31 samples collected from various phosphate mine sites in southeastern Idaho (25), northern Utah (2), and western Wyoming (4)

Petrographic and geochemical analyses of 50 outcrop samples and 58 drill core samples.

Data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier, published (at 1:2,500,000 scale) in volume G-1 of "The Geology of Alaska" (GSA)

High resolution aeromagnetic survey used to infer the locations of igneous rock bodies in the area, which are provided in GIS data files

Major and trace element analytical results of samples of bauxite (aluminum ore) and associated rocks.

Major and trace element analytical results of samples of aluminum ore and nearby rocks in order to understand the prevalence of critical minerals there and in similar deposits. Data are provided in Microsoft Excel, CSV, and shapefile formats.

Major and trace element chemistry of rock samples collected in this area, where surrounding rocks host numerous mineral deposits and occurrences. Data are provided in Microsoft Excel and CSV formats.

Geochemical analyses of rock samples collected by the U.S. Geological Survey from surface exposures of host rock and REE-mineralized pegmatites and felsic dikes in this area. Data are provided in Microsoft Excel and CSV formats.

A compilation of new and previously published geochemical and modal analyses of Mesoproterozoic igneous rocks in this area. Includes major and trace element geochemistry and mineralogical composition as well as sample locations and characteristics. Data for 618 unaltered samples and 549 altered samples are provided as Microsoft Excel and as tab-delimited text.

A geochemical database for a regional subset of IOA ore and mine waste products, created because the apatite in these mineral deposits may also host rare earth elements. Data are provided in CSV format.

Whole-rock major, minor, and trace element geochemistry of rock samples collected from diamond drill holes that intersect the textural discontinuity at the top of the Reef Package from the underground working of the Stillwater Mine. Data are provide in CSV format.

40Ar/39Ar dating, electron microprobe analyses and geologic mapping help clarify chronology and correlations of the numerous volcanic and intrusive units exposed in the area and interpret the petrogenesis of a few of the volcanic units.

Presents data for mineral deposits and unaltered and hydrothermally altered volcanic rocks. Data presented were acquired in three USGS labs by three different geochronologists. Analytical methods and data derived from each lab are presented separately.

Maps, tables, and GIS data for isotopic ages determined in the northern part of the study area.

Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of apatite provide trace element concentrations that support indicator mineral studies in this deposit. Data are provided in CSV format.

Results of a computational geospatial analysis (linear deconvolution) of thermal infrared emissivity imagery to determine the variation of mineralogical composition of aeolian deposits. Minerals include calcite, potassium feldspar, plagioclase, and quartz. Data are provided in GeoTiff format.

Geochemical analysis of rock samples focusing on characteristics relevant to mine cleanup discussions

Chemical analysis of altered volcanic rocks to determine their potential for neutralization of acid-rock drainage. Includes magnetic susceptibility measurements as well.

The purpose of this report is to present available petrographic and geochemical data for unmineralized rock samples, principally volcanic rocks and to make those data available to ongoing petrogenetic investigations of these rocks.

Presents data and describes the methods used to determine the physical attributes, as well as the chemical and mineralogical composition of surficial deposits; groundwater levels; and water composition in this area.

A compilation of worldwide mineral deposits of this type. This older version was revised and updated in OFR-2008-1155.

Radiometric ages of rocks or minerals sampled from Alaska. The data were collected from professional publications and/or received from researchers and used by permission.

Regional maps of phyllic and argillic hydrothermal alteration are presented on 10 separate plates available in either low or high resolution. A GIS package includes points features for potential porphyry copper sites also provided in tabular form.

Geologic and physiographic description of major rock salt deposits in the US, compiled from the perspective of the potential use of these deposits for storage of radioactive waste.

Isotopic data and ages for selected igneous bedrock samples collected in 2001 through 2003 from this area. Data are provided in CSV format.

Geochronological and geochemical analyses of these rocks providing information about multiple time periods of accretion, regional metamorphism, and magmatic activity. Data are provided in CSV format.

Geochronological data for sedimentary and metasedimentary rocks in this area. Data are provided in CSV format.

U-Pb isotopic data and associated ages of detrital zircon grains and fossil identifications and age assignments from a select sedimentary rocks in this area. Data are provided in CSV format.

Contains results of age dating studies interpreted in other reports. Samples in each study shown as separate sheets within Excel files. Analyses of each zircon are listed separately on a sheet according to filtering scheme and type of instrument used.

Geochronologic analyses to determine the ages of the plutonic rocks in the Glacier Bay area. Five samples were dated by laser ablation-inductively coupled plasma mass spectrometry U-Pb methods. These analyses contribute to understanding the geologic history of this area. Sample locations and characteristics, along with measured isotopic ratios and calculated ages are provided in CSV format.

Geochronology data to determine the ages of Challis igneous rocks in this area to help understand the stratigraphy and lithologic characteristics of these igneous rocks. Data are provided in CSV format..

U-Pb geochronology and isotopic studies of select plutons across the Salmon River suture in western Idaho.

Whole rock major and trace element data for 399 igneous and sedimentary rock samples collected from this area. Data are provided in CSV format.

Geophysical investigations of Mountain Pass and vicinity were begun as part of an effort to study regional crustal structures as an aid to understanding the geologic framework and mineral resources of the eastern Mojave Desert. The study area encompasses

Geochemical analyses of rocks, mineral separates, bulk samples from lake and stream sediments, heavy mineral concentrates, and soils collected by USGS from 1962 to 2009.

Geochemical analysis of rock, sediment, soil, mineral, and heavy mineral concentrate samples in Alaska analyzed from 1938 through 2017. Includes best-value chemical element concentrations as well as mineralogical analysis. Data are provided in Microsoft Access and CSV formats.

The Alaska Geochemical Database Version 3.0 (AGDB3) contains new geochemical data compilations in which each geologic material sample has one “best value” determination for each analyzed species, greatly improving speed and efficiency of use. Like the

Geochemical analyses of rocks, mineral separates, bulk samples from lake and stream sediments, heavy mineral concentrates, and soils collected by USGS from 1962 to 2009.

Analyses to establish the background and baseline geochemistry for bedrock and soil in the region, and to determine terrestrial mercury sources and sinks in the park

Geochemical analyses conducted as part of a larger study of the Midcontinent Rift in the Lake Superior region.

Whole-rock and calcite geochemical data are reported for twelve carbonatite samples collected from the Bear Lodge alkaline complex, a known occurrence of rare earth elements. Data are provided in CSV format.

Data on 60 of the 527 known carbonatites in the world, providing reliable quantitative data on ore tonnages and grades of niobium and REE.

Data on 60 of the 527 known carbonatites in the world, providing reliable quantitative data on ore tonnages and grades of niobium and REE.

Chemical analysis of 47,478 samples of various geological materials to facilitate geologic mapping, petrologic studies, mineral resource assessment, and similar regional environmental assessements.

Geological and borehole geophysical data and observations collected to characterize the basin and its surface and groundwater flow systems with primary focus on the physical characteristics of the fault vein, related mine workings, and surrounding bedrock

Geophysical study of the sediment under a river intended to help assess the susceptibility of this material to scour and the erosion of levees adjacent to the river.

A comprehensive database of chemical and mineralogical properties for ferromanganese crusts collected throughout the Atlantic, Pacific, and Indian Oceans from published and unpublished sources.

Report containing tables of geochemical data

Descriptions of more than 60 mineral regions, mines, and mineral deposits within the United States and its territories that are reported to contain enrichments of cobalt. Data are provided in Esri file geodatabase, shapefile Microsoft Excel, and CSV formats.

Global compilation of information on the sediment-hosted Pb-Zn deposits traditionally called sedimentary exhalative (SEDEX) and Mississippi Valley Type (MVT) deposits, including updated updated grade and tonnage data.

Analytical results and evaluated source data files of geospatial analyses for identifying areas in Alaska that may be prospective for different types of lode gold deposits, including orogenic, reduced-intrusion-related, epithermal, and gold-bearing porphyry. Results are expressed as numerical scores associated with fine-scale watersheds (12-digit hydrologic unit codes).

Analytical results and the evaluated source data files of a geospatial analysis for identifying areas in Alaska that may have potential for hosting mineral deposits of this type.

Location and characteristics of significant deposits, so designated because they are few in number yet collectively represent almost the totality of domestic production and resources of these metals. Data are provided in Microsoft Excel, Esri file geodatabase, shapefile, and CSV formats.

It has long been recognized that the largest mineral deposits contain most of the known mineral endowment (Singer and DeYoung, 1980). Sometimes called giant or world-class deposits, these largest deposits account for a very large share of historic and cur

Epithermal gold-silver deposits are vein, stockwork, disseminated, and replacement deposits that are mined primarily for their gold and silver contents; some deposits also contain substantial resources of lead, zinc, copper, and (or) mercury. These deposi

This report describes compilation and evaluation results of data from the USGS global mineral assessment including new descriptive mineral-deposit and grade and tonnage models and spatial databases for deposits and occurrences, ore bodies and open pits.

Mineral groups identified through automated analysis of remote sensing data acquired by the ASTER system were used to map the type and spatial distribution of hydrothermal alteration, other exposed mineral groups, and green vegetation.

Images and text from a poster session (Geological Society of America Northeastern Section) showing methodology and results for an example

Includes descriptions of 981 known occurrences and deposits as well as qualitative assessment of undiscovered resource potential in 84 permissive tracts.

Rock outcrop locations taken from geologic maps published from the 1940s until the late 1990s. Bedrock exposure locations were routinely recorded to provide both an indication of where direct observations were made, and as a guide for future investigations to expedite location of observable rock exposures. Data are provided in shapefile format.

Data from seismic reflection and refraction, electromagnetic sounding, and resistivity profiling in a study area in Indiana. Exact location is not provided.

Helium, neon, and argon isotopic compositions contained in fluid inclusions in 25 samples from these mineral deposits. Four mineral separates from the Butte Main Stage vein deposit and two from the Bingham pyrite-enargite vein deposits were also analyzed. Includes some hand samples from underground mine workings and some from mine tailings piles and pits. Data are provided in CSV format.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Geochemical analyses of rock samples collected by the U.S. Geological Survey from surface exposures of host rock and REE-mineralized pegmatites and felsic dikes in this area to provide information on potential sources of co-product and by-product critical elements in domestic mineral deposits and to allow comparison with other REE deposits in peralkaline igneous complexes. Data are provided in CSV format.

Interactive web site showing geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801

Geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801

Between 2007 and 2013, the U.S. Geological Survey conducted a low-density (1 site per 1,600 square kilometers, 4,857 sites) geochemical and mineralogical survey of soils in the conterminous United States. The sampling protocol for the national-scale surve

High-spatial resolution geochemical analyses of Mesoproterozoic apatite crystals in igneous rocks from this area to elucidate the petrogenetic histories of the samples and help evaluate ore deposit models. Data are provided in CSV format.

Geochemical analysis of samples from IOCG-REE type deposits in this area to facilitate petrologic studies, mineral resource assessments, and the definition and statistics of geochemical baseline values. Data are provided in Microsoft Access, Microsoft Excel, and tab-delimited text formats.

Sample description, location, and geochemical analysis of Mesoproterozoic igneous rocks and iron oxide-apatite-rare earth element and iron oxide-copper-cobalt-gold deposits in this area. Data are provided in Microsoft Access and tab-delimited text formats.

Maps derived from a subset of the National Uranium Resource Evaluation Hydrogeochemical and Stream Sediment Reconnaissance data. Samples are from streams, lakes, ponds, springs, playas, and soils. Includes Na, Ti, Fe, Cu, Zn, As, Ce, Hf, Pb, Th, and U.

Geochemical data from the re-analysis of 44 rock samples collected between 1966 and 1970, and 107 sediment samples collected in 1966 and 1967 for a study investigating the mineral resources of this area. Data are provided in CSV format.

Hydrothermal orebodies and their host rocks are characterized by compositional variations in magnetite. Minor and trace element data for hydrothermal and igneous magnetite are compared with an unmineralized magnetite-series granodiorite in southwest Japan

A study conducted collected 57 surface rock samples from nine types of intrusive rock to reexamine the chemistry and metallic content of the major rock units of the Iron Hill complex

Diverse collection of previously published GIS datasets describing geological and geophysical characteristics of this area pertinent to the study of metallic mineral resources located there.

Mineralogical data on samples from the surface and from drill cores, with geological observations help to understand the hydrology and effects of geology on acid-rock drainage in a mineralized alpine watershed.

Major element oxide and trace element geochemical analyses, including those for gold, silver, and base metals, for representative rock units and for grab samples from quartz veins and mineralized zones within the quadrangle

Province contains Weka Dur, see companion report chapter B. Reproduces the topology of original Soviet maps and cross sections. Original Russian terminology and rock classification translated into modern English geologic usage as literally as possible.

<h1>Introduction</h1>The San Juan-Silverton caldera complex located near Silverton, Colorado, in the Southern Rocky Mountains volcanic field is an ideal natural laboratory for furthering the understanding of shallow-to-deep volcanic-related mineral system

Geologic units, structural features, geochemical sample points, and detailed information about the Tilaran gold mining area.

Data for 90 rock samples collected from 2001 to 2007 for geophysical, geochemical, mineralogical, and environmental rock properties of acid neutralizing capacity and net acid production.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Explains process by which data on rock type, minerals, geochemistry, and geophysics were analyzed to identify the potential for sediment-hosted lead-zinc deposits in Alaska. Includes descriptive information on the types of deposits studied and the results obtained from the analysis.

Approximate locations and short descriptions of mines, deposits, and districts where critical minerals are found. The critical minerals are discussed in USGS Professional Paper 1802 many of these locations are described in further detail in that report.

Global distribution of mineral resource features for 22 minerals or mineral commodities considered critical to the economy and security of the United States as of 2017, included as part of USGS Professional Paper 1802. Data are provided in Esri file geodatabase and shapefile format.

Using current mineral inventory and cumulative production data for worldwide tungsten skarn deposits, this report presents an updated grade and tonnage model for deposits of this type.

Locations, extent, and detailed characteristics and history of mineral deposits containing this commodity, including history of production, resource estimates, and extent of surface workings. Data are provided in Esri file geodatabase, shapefile, and CSV formats.

Cassiterite , a main ore mineral in tin deposits, is suitable for U–Pb isotopic dating because of its relatively high U/Pb ratios and typically low common Pb. We report a LA-ICPMS analytical procedure for U–Pb dating of

Age dating of apatite and rutile samples from the iron oxide-apatite-rare earth element and iron oxide-copper-gold deposits hosted by the Mesoproterozoic rocks in this area. Data are provided in Microsoft Excel and CSV formats.

Descriptions of the only U.S. sites-including mining districts, mineral occurrences, and mine features-that have reported production and (or) resources of indium (In). Data are provided in CSV, Esri file geodatabase, and shapefile formats.

Maps of exposed surface mineral groups derived from automated spectral analysis of Landsat 7 ETM+ and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Re-classification of geologic units according to their geochemical properties

138 rock geochemistry samples collected during the 2006 field season were analyzed using the ICP-AES/MS42, ICP-AES10, fire assay, and cold vapor atomic absorption methods

Total mercury and methylmercury measured in sediments, tailings, and water in an area where historical gold mining has occurred; proposed habitat restoration work may release some of the mercury that is currently buried there.

Point locations with characteristics of mines and prospects.

Map interface and data download of Sed Zn-Pb data including KML and GIS data formats

Chemistry and geologic information for nearly 30,000 historic ore and ore-related rock samples from mineral deposits and mining districts in the United States. Data are provided in Microsoft Access and CSV formats.

Geochemical analysis of rock samples collected and analyzed by the USGS. This dataset includes and supersedes rock data formerly released as "Geochemistry of igneous rocks in the US extracted from the PLUTO database"

Location, type, mineralogy, name, tonnage and grade, and geological setting for 120 deposits of this type. The US has no active nickel mines or nickel reserves.

Location, type, mineralogy, name, tonnage and grade, and geological setting for 120 deposits of this type. The US has no active nickel mines or nickel reserves.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Comparative LA-ICP-MS Pb-Pb and U-Pb dating results for cassiterite from a variety of geologic settings and ages from the Russian Karelia, Siberia, and the Russian Far East. Constraining the age of cassiterite mineralization is critical for delineating robust genetic models of tin deposits. Data are provided in CSV format.

Density and magnetic susceptibility measurements made on rocks and outcrops in this area. Data are provided in CSV format.

Location and characteristics of 1,124 individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

Location and characteristics of 1,124 individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

New and updated location, references, and grade and tonnage data for porphyry copper deposits in the Andes along with grade and tonnage data from the previous compilations. Data are provided in file geodatabase, shapefile, Microsoft Excel, and CSV formats.

Information on porphyry copper deposits from around the world with grade and tonnage models, a general classification based on geologic setting, mineralogy, with data allowing locations of these deposits to be plotted using GIS.

A compilation of worldwide mineral deposits of this type. This older version was revised and updated in OFR-2008-1155.

Revised and updated information about mineral deposit models for porphyry copper deposits to facilitate assessment of undiscovered resources

Locations and descriptions of known occurrences, with qualitative assessment of the development potential of permissive tracts where undiscovered deposits of this type may occur.

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

For each area in which this type of deposit may occur, we provide the main characteristics of the area, classification of known deposits by subtype, and a rank indicating the potential of the area to contain undiscovered resources.

Summarizes importance of rare earth elements, characteristics of REE deposits, REE-bearing minerals, and the types of mineral deposits that contain these elements.

Geochemical analysis and characteristics of bauxite deposits in this area.

Geologic map unit and lithologic descriptions used in Open File Report 2005-1235, with extensive bibliographic references to geologic literature that could not be included in the spatial database.

Characteristics of 785 deposits, including grade, tonnage, rocks, mineralogy, and references

Location and characteristics of 123 sediment-hosted gold deposits worldwide.

Location and characteristics of 123 sediment-hosted gold deposits worldwide. These deposits have disseminated micron-sized invisible gold in sedimentary rocks.

Map interface and data download of Sed Zn-Pb data including KML and GIS data formats

This report provides information on sediment-hosted zinc-lead mineral deposits based on the geologic settings that are observed on regional geologic maps.

Data on gold deposits extracted from an existing publication (available only as an image) to enable analysis. The Ontario Geological Survey, Ministry of Northern Development and Mines, Ontario, Canada kindly granted permission to re-publish these data. These data are provided in CSV format.

Weight percent of 15 mineral groups from 331 samples, geochemical analyses of 58 major and trace-element chemical species from 502 samples taken at 175 sites, along with data from geochemical reference standards and analyses of splits.

Resource assessment and supporting data including permissive tracts, mineral sites in the study area, geologic units, geologic maps, stream sediment geochemistry, whole rock chemistry, airborne radiometric data, and lower frequency content EMAG2 data. Data are provided in Esri file geodatabase, shapefile, and CSV formats.

Polygons that describe areas of rock outcrop in the area of the Stillwater Complex, Montana from published reports and field mapping sheets. Includes both legacy data and outcrops from recent field mapping. This dataset contains overlapping polygons, as some areas had mapping from different sources that overlapped the same locations. Data are provided in shapefile format.

Sulfur isotope determinations (34S/32S ratios) for sulfur-bearing minerals collected from epithermal veins in this area and from metasedimentary rocks that host the Black Angel zinc-lead-silver deposit. Samples were collected by cooperators as parts of larger ore genesis studies. Data are provided in CSV format.

Describes the rationale for, and structure of, a table developed for Earth MRI that relates critical minerals and principal commodities to the deposit types and mineral systems in which they are concentrated. The hierarchical relationship between systems, deposits, commodities, and critical minerals makes it possible to define and prioritize each system-based focus area once for all of the critical minerals that it may contain.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Locations, extent, and detailed characteristics and history of mineral deposits containing this commodity, including history of production, resource estimates, and extent of surface workings. Data are provided in Esri file geodatabase, shapefile, and CSV formats.

Information on titanium-vanadium deposits hosted in mafic-ultramafic layered intrusions and massif anorthosite intrusions from around the world. Includes only deposits with reported grade and tonnage information. Data are provided in CSV and shapefile formats.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Electron microprobe spot analyses of U, Th, and Pb concentrations in uraninite (U oxide) particles, and corresponding calculated age determinations, measured in samples of ore from two uranium-copper breccia pipe ore bodies in this area. Data are provided in CSV format.

The Cornwall and Devon vein- and greisen-type copper and tin deposits of southwest England are spatially and genetically related to shallow-seated granitic intrusions. These late Variscan intrusions, collectively known as the Cor

Laboratory reflectance and emissivity spectral measurements of dune sand samples collected from a variety of dune types and mineralogical compositions from eight dune field locations in Alaska, Arizona, California, Colorado, Idaho, Nevada and New Mexico. Data are provided in CSV format.

Data collected to determine geologic background concentrations of trace metals in water and stream sediment, and to quantify the increase in dissolved constituents in streams attributable to historical mining activity in this area. Data are provided in CSV format.

Rock property measurements including density, magnetic susceptibility, and radiometric concentrations to understand structural and geophysical relationships associated with rare earth element mineral deposits. Data are provided in CSV format.

Whole rock chemistry on 185 samples, mostly from Au prospects, with lesser samples from porphyry Cu prospects in this area. Data are provided in CSV and shapefile formats.

Whole rock major, minor, and trace element geochemical data from outcrops, waste rock piles, and drill core from the upper part of this deposit, the associated base metal vein system, and the surrounding hydrothermally altered to unaltered country rock. Data are provided in CSV format.

Geochemical, x-ray diffraction mineralogical, and electron probe microanalysis (EPMA) data on rocks, soils, and sediments collected near porphyry copper deposits in this area. Data are provided in CSV format.

Geochemical analysis of alkaline igneous rocks, carbonatites, and weathered and oxidized samples in and near a rare-earth element deposit. Data are provided in Microsoft Excel format.

Full raw argon isotopic data for samples from this deposit. Data are provided in CSV format.

Conventional K-Ar ages for granitic, volcanic, and metamorphic rocks collected in this area.

<p>The Stillwater Complex is a Neoarchean, ultramafic to mafic layered intrusion exposed in the Beartooth Mountains in south-central Montana. This igneous intrusion contains magmatic mineralization that is variably enriched in strategic and critical commo

The report contains digital data, primarily a layer of polygons linked to records summarizing previous interpretations of aeromagnetic anomalies. Data are presented in updated format for input to a GIS, standard graphics software, or map-plotting package.

USGS collaboration included providing analysis of Landsat imagery; gravity measurements of sediment and rock samples; oversight of passive seismic data collection and subsequent analysis; and analysis of the chemistry and mineralogy of subsurface samples.

Measurements indicating abundance of radioactive elements in near-surface rocks. Grids and flight-line data from surveys flown 1976-1980.

Maps, grids, and flight-line databases of a detailed aerial survey and maps and grids of satellite data

Magnetic anomaly and radiometric data for this area, to understand the geological structure and processes controlling the presence and distribution of alkaline igneous rocks that may be enriched in rare earth elements. Data are provided in CSV, GeoTiff, and Geosoft XYZ (flight-line) formats, packaged using the compressed 7-zip format.

Study to estimate the 3-D distribution of permafrost, to evaluate the effectiveness of these methods at mapping permafrost geometry, and to better define the physical properties of the subsurface in discontinuous permafrost areas.

Airborne electromagnetic and magnetic survey data were collected during 2016 along 300 line kilometers in this area, flown at a nominal flight height of 30 m above terrain along widely spaced reconnaissance lines. Includes raw and processed AEM data, laterally-constrained inverted resistivity depth sections along all flight lines, and unprocessed and processed magnetic data. Data are provided in CSV format.

Digital flight line data for a high resolution horizontal magnetic gradient and radiometric survey over this area. Flight line spacing was 300 m, mean terrain clearance was 140 m. Includes flight line data for the magnetic gradient survey, flight line data for the radiometric survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. Data are provided in CSV format, flight lines are provided in shapefile format.

Digital flight line data for a high-resolution airborne magnetic and radiometric survey over this area. Data are provided in CSV and GeoTIFF formats.

Geochemical analyses of rock, sediment, soil, mineral, and heavy mineral concentrate samples in Alaska analyzed from 1962 through 2009, with best-value estimates.

A database of mines, prospects, and mineral occurrences in Alaska compiled from published and unpublished sources from industry, U.S. Bureau of Mines, USGS, and other government and private sources. Data are provided in FileMaker, CSV, KML, Esri file geodatabase, and GeoPackage formats.

Summarizes the primary characteristics of alkalic-type epithermal gold deposits and provides an updated descriptive model, including geologic setting and processes, associated deposit types and commodities, Discusses examples of this type.

The U.S. Geological Survey (USGS) and the Bureau of Land Management (BLM) collected stream-sediment and soil samples in order to evaluate the geochemistry of the Humboldt River Basin.

Geochemical data from 2560 stream sediment samples collected in Puerto Rico, 421 soil samples collected on Isla de Vieques, and 35 soil samples were collected on Isla de Culebra, analyzed by semiquantitative spectrographic methods.

Antimony’s leading use is as a fire retardant in safety equipment and in household goods such as mattresses. The U.S. Government has considered antimony to be a critical mineral mainly because of its use in military applications.

Location and mineralogical characteristics of former mines, prospects, and occurrences of asbestos in the continental US. No asbestos producing mines are currently active. Data here are drawn from several previously published reports.

Audiomagnetotelluric (AMT) sounding data collected in 2008 in this area in support of assessments of concealed mineral resources.

Analysis of multispectral satellite imagery allows us to identify areas covered by various types of minerals and vegetation, with results provided in image files you can use in GIS.

Estimates thickness of sand and gravel resources available in this broad area using geology, topography, land cover, and ground-water level.

Explains how a set of mineral resource province maps were compiled, what sort of information went into them, how they should be interpreted, and why they are important.

Barite (barium sulfate, BaSO4) is vital to the oil and gas industry because it is a key constituent of the mud used to drill oil and gas wells. Elemental barium is an additive in optical glass, ceramic glazes, and other products.

Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

Beryllium is a mineral commodity that is used in a variety of industries to make products that are essential for the smooth functioning of a modern society.

Bulk chemistry and x-ray diffraction results of unreacted fly ash in this area. Data are provided in CSV format.

Bulk chemical data for fly ash samples from this area. Data are provided in CSV format.

Multi-element geochemical analysis of host rock, ore, mine waste, flotation-mill tailings, slag, stream sediments, creek and adit waters, and leachates of mine waste and mill tailings.

Preliminary information about the concentration, spatial distribution and mineral hosting of metals and other elements in solid materials at the Elizabeth copper mine after 50 years (or more) of weathering and oxidation.

Geochemistry of soils and other regoliths collected and analyzed by Hans Shacklette and colleagues from 1958 until about 1976.

Geochemical data for more than 1,500 archived stream-sediment samples and accompanying quality control samples.

Scanned paper report giving partial results of chemical analysis as well as summaries of notes and field and laboratory methods are presented for the chemistry of vegetation, water, and surficial sediments collected in 1994 and 1995 in this area. PDF format.

This report examines potential sources of lanthanide elements [rare earth elements (REE)] with the objective of providing up-to-date geologic information regarding mineral commodities likely to have increased demand in the near term.

Information related to amphibole and other minerals in order that commercial, regulatory, and other entities may obtain a better understanding of their impact on potential resource development. Data are provided in Microsoft Excel CSV, annotated PDF reports including microphotographs and analytical results, and JPEG formats.

Cobalt is a silvery gray metal that has diverse uses due to its ferromagnetism, hardness and wear-resistance when alloyed with other metals, low thermal and electrical conductivity, high melting point, multiple valences, and color effects with silica.

A multidisciplinary mapping and data integration project focused on long-term resource planning by the mapping and characterization of exposed surface mineralogy, including that related to hydrothermal alteration and supergene weathering of pyritic rocks.

Locations and characteristics of important mineral and energy resource facilities, with some permissive tracts and resource assessment information. Data are provided in Esri file geodatabase and shapefile formats.

Georeferenced locations of mineral commodity production and processing facilities, mineral exploration and development sites, and mineral commodity exporting ports for the countries in this area. Data are provided in Esri file geodatabase format.

Samples of surficial materials analyzed for aluminum, barium, cadmium, lead, and zinc concentrations.

A regional profile on the Utah-Nevada State line reveals a deeply penetrating, broad electrical conductor suggesting the southwestern limit of intact Archean crust is farther north than previously reported with implications for future mineral exploration.

Nevada is one of the Earth's premier gold producing regions, accounting for approximately 64 percent of the U.S and nine percent of the world total. The impact of these mines on nearby local economies and on our national balance of payments is profound, a

Elemental concentration data for more than 1700 archived stream-sediment samples collected in Alaska.

Geographic extent of sand and gravel deposits in this area as GIS data.

Best measured value for 68 elements in 175,856 samples were combined statewide. Data are provided in shapefile format.

Distribution of the mineral pyrrhotite, an unstable sulfide mineral, across the conterminous United States, to help inform risk assessments. Data are provided in Esri file geodatabase, shapefile, and CSV formats.

Analyses of core and surface samples collected in and around this mineral deposit. Samples were collected and analyzed between 1980 and 2000. Data are provided in Microsoft Excel and CSV formats.

Compilation of previously published data on the distribution and character of mineral resources in this area. Data are provided in GeoTiff and shapefile formats.

Location and descriptive data for aggregate producers in New Mexico that are believed to have been active during the period 1997-1999.

Physical property measurements rocks from this area, including station identifier, geographic coordinates, rock type, density, magnetic susceptibility, remanent magnetization, declination, and inclination where available. Data are provided in CSV format. Sample locations are provided in shapefile format.

Raster image files indicating the interpreted alteration and mineral groups inferred using the methodology.

Descriptive mineral deposit model describing the geologic setting, physical, chemical and mineralogical characteristics of deposits of this type, including characteristics of the rocks surrounding and hosting the deposits.

Geochemical and radionuclide analyses of surface samples and cores taken near the outflow of this old uranium mine.

Point features representing pit locations and attribution data captured from an atlas of map sheets and pit data sheets by the Arizona Highway Department

Geologic map compiled from existing sources without generalization, with new or revised data where available. Part of a statewide geologic map database effort in which the structure and content of the data is as consistent as is practical.

Tabular and geospatial data digitized from a U.S. Bureau of Mines that presented results of a mineral resource potential survey in this area. Georeferenced scanned plates are provided in JPEG format, other data are provided in Esri file geodatabase, CSV, and shapefile formats.

Flight-line data and gravity grids with documentation.

Spatial database that delineates mining-related features in areas of historic and active phosphate mining.

Multispectral remote sensing data acquired by Landsat 8 Operational Land Imager (OLI) sensor were analyzed using an automated technique to generate surficial mineralogy and vegetation maps of the conterminous western United States. Data are provided in ERDAS Imagine format.

Details of materials and geologic environments in an area where a long history of mining has enriched stream sediments in silver, lead, zinc, arsenic, antimony and mercury, copper, cadmium, manganese, and iron.

Electron microprobe analyses of sphalerite and hemimorphite from sampled historical waste piles were conducted with a specific focus on germanium (Ge). Data are provided in CSV format.

Detailed mineralogical and geochemical study of ore minerals that can contain the critical mineral commodity germanium. Data are provided in CSV format.

Electron microprobe geochemical data that is used to showcase differences in phosphates when derived from magmatic-hydrothermal systems compared to metamorphic-hydrothermal systems to improve understanding of the mechanisms by which some mineral deposits were formed. Data are provide in CSV format.

Mean concentrations of 35 elements, ash yields, and pH have been estimated for samples of sils and other unconsolidated surficial materials from 266 collection locations throughout Alaska. These background values can be applied to studies of environmental

Elemental concentrations for bulk and size-fractionated mine waste from sampled historical waste piles from this area. Data are provided in CSV format.

Data from field sampling of tailings, waste rock, sediment, and water at the mines, along with water, sediment, and biota in a pond and tributaries that drain from the mine area, to help assess the chemical hazards due to historic mining.

Results of mineral abundance estimates based on Rietveld refinement of X-ray diffraction (XRD) analyses of mill tailings and other ore processing materials from worldwide localities. Data are provided in CSV format.

Sample locations and descriptions, with compositional analysis to constrain the natural background levels of fibrous amphiboles potentially derived from the nearby Rainy Creek Complex.

This report summarizes the assembly of pertinent data, determination of its limits, analysis of its properties, and the relations among the different data types in preparation for future modeling.

Fluorine compounds are essential in numerous chemical and manufacturing processes. Fluorspar is the commercial name for fluorite (isometric CaF2), which is the only fluorine mineral that is mined on a large scale.

Discusses the physical properties of frac sand, its geologic origin and formation contributing processes, its use in industry, consumption history and a global outlook. US / Canadian producers are detailed and potential other sources delineated in a GIS

Gallium is a soft, silvery metallic element with an atomic number of 31 and the chemical symbol Ga. Gallium is used in a wide variety of products that have microelectronic components containing either gallium arsenide (GaAs) or gallium nitride (GaN).

Garnet Lu-Hf ages of the schist of Moores Station Formation and a cross-cutting garnetiferous felsic dike in this area. These ages provide part of the early geologic history leading up to ore deposition. Data are provided in CSV format.

Data derived from the 1996 "Generalized Thermal Maturity Map of Alaska" compiled by M.J. Johnsson and D.G. Howell, published in USGS Bulletin 2142. Combines vitrinite reflectance and conodont alteration index in generalized units.

Results of analysis in tabular form

Inorganic chemical analysis of surface- and groundwater and springs in this area to understand natural versus anthropogenic inputs from mineralized and hydrothermally altered areas. Data are provided in Esri file geodatabase, CSV, and shapefile formats.

Chemical composition of sediments and soils are of interest because of the potential for human and wildlife health impacts from high metal contents due to over 100 years of mining activity.

Geochemical data for all solid sample media, along with mineralogical data, and results of weathering experiments on Valzinco tailings and field experiments on sediment accumulation in Knights Branch.

Systematic geochemical and mineralogical survey of soil horizons analyzed using a consistent set of methods, sample spacing 1 per 1,600 sq km.

Systematic geochemical and mineralogical survey of soil horizons analyzed using a consistent set of methods, sample spacing 1 per 1,600 sq km.

Extensive core drilling has delineated a large, deep seated, structurally intact deposit here. Distribution of elements and minerals determined for this study provide a zoning model applicable to similar deposits and useful for resource exploration.

The Paleocene Fort Union Formation hosts a compositionally diverse array of Eocene plugs, dikes, and sills arrayed around the Eocene Big Timber stock in the Crazy Mountains of south-central Montana. The geochemistry and petrography of the sills have no

Detailed chemical and isotopic analysis of host and associated rocks within an area that is currently the largest producer of gold in the US. Part of a study of the hydrothermal activity leading to the formation of these gold deposits.

These samples and their geochemistry reflect the variation of base-metal sulfide and uranium oxide mineralization within ore zones of the Canyon deposit. The ore mineralogy, and thus rock chemistry, can vary over short intervals (centimeters). Data are provided in Microsoft Excel and CSV formats.

An environmental impact study is done for the abandoned Ely copper mine. The extent of contamination is studyed along with the type and chemical composition of the mine waste piles.

Sampling procedures, analytical methodologies, and results to assess the potential for mine waste and drainage to have an adverse impact on aquatic ecosystems, on drinking- water supplies, and to human health

Information about iron and steel slag samples in this area, including bulk chemistry, acid-base accounting, particle size analysis, synthetic precipitation leaching protocol results, and batch and column phosphate removal experiments. Data are provided in CSV format.

Whole-rock major, minor, and trace element geochemical data for carbonatite samples from this deposit. Samples include a suite of outcrop samples and a suite of composite samples. Data are provided in CSV format.

Major and trace element concentration data for 960 sites, providing a baseline for the natural variation in soil geochemistry in Colorado.

In this area of historical lead-zinc mining activity, studies such as this help to assess the possibility of human exposure to cadmium and lead through eating fish.

Analytical results for geochemical samples collected in 2007 from the Pebble deposit and surrounding environs

Chemical analysis of surface samples taken over a well known but concealed deposit to understand metal migration into the surface materials and to assess the power of surface sampling for detecting concealed deposits of this type.

Whole rock geochemical data for volcanic rocks in this area, both extrusive rocks and hypabyssal dikes. Major oxides and trace elements are included. Data are provided in CSV format.

Includes all geochemical data generated by each project partnership funded through Earth MRI and will be updated periodically as additional geochemical data from these projects becomes available.

Previously unpublished geochemical data from 1966-1984 projects to describe the geology, determine petrologic and geochemical characteristics and to evaluate the mineral resource potential of the primitive areas and of adjacent study areas. Data are provided in Microsoft Access, shapefile, and CSV formats.

Geochemical analyses of Cretaceous igneous intrusions in order to establish the geologic framework for world-class mineral deposits of the Butte district

Data from a study intended to explore how well the chemical analysis of water and sediment in an area reflects that of the rock from which the sediments are eroded and through which the water flows.

This report presents chemical characteristics of transient unsaturated-zone water collected by lysimeter from the Manning Canyon repository site in Utah. Data collected by U.S. Geological Survey and U.S. Department of the Interior, Bureau of Land Manageme

Concentration, mineral hosts, and speciation of germanium in mine wastes from this site. Data are provided in CSV format.

Chemical data from stream water, groundwater, and soil samples collected in 2019 and 2020 in this area. Data from a tracer study is included as tool for understanding sources and loading rates of metals affecting stream water quality in a watershed affected by legacy mining and natural sulfide-weathering. Data are provided in CSV format.

Geochemical data for unconsolidated sediments (stream sediments, lake sediments, etc.) collected in the US and analyzed by the USGS. These data were originally entered in the PLUTO database, which is now merged into the National Geochemistry Database.

Surficial geochemical methods used to identify subsurface mineral deposits covered by alluvium. Can a geophysical anomaly, interpreted as a buried granite pluton, be discerned from the geochemical characteristics of overlying Quaternary sediments?

Geochemical data for soils collected in the United States and analyzed by the USGS. The data were originally entered into the in-house PLUTO database. This is a subset of DDS-47.

Geochemical data for soils collected by USGS personnel and analyzed by the USGS. These data were originally entered into the Rock Analysis Storage System (RASS), a database that is now merged into the National Geochemistry Database.

National-scale geochemical analysis of stream sediments and soils in the US collected and analyzed under the National Uranium Resource Evaluation program.

Geochemical data for unconsolidated sediments (stream sediments, lake sediments, etc.) collected by USGS personnel and analyzed by USGS. These data were part of the Rock Analysis Storage System and are now merged into the National Geochemistry Database.

New age determinations with descriptions of sample locations and analytical details.

New geologic map to reflect mapping of late Cretaceous to Tertiary clastic sedimentary rocks, park-wide mapping of surficial deposits, and a newly revised volcanic stratigraphy.

Geologic map and associated digital databases of central Alaska. Compilation and reinterpretation of previously published and unpublished mapping at 1:250,000 scale, with limited 1:125,000 and 1:63,360 scale mapping.

Presents one of several gold and copper deposit prospect areas in west-central Afghanistan. Reproduced topology of original Soviet maps and cross sections. Original terminology and rock classification translated literally to modern English geologic usage.

Map and study intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide hazards, mineral potential, seismic velocity, and earthquake faults.

Spatial geologic map with rock type, vents, arcs, landslides, etc. provided in an ESRI geodatabase and KMZ format for Google Earth viewing. Mapsheet with accompanying descriptive pamphlet is provided as a PDF. Petrographic rock summary is also included.

Geology of the Christian quadrangle in the Porcupine Plateau, southern Brooks Range, and Yukon Flats. Includes geologic map, fossil data, location of oil shale, and geospatial data sets.

The map updates a major geologic map of the Cook Inlet region published in 1976 incorporating new and additional mapping and interpretation. This map is also a revision of areas of overlap with the geologic map completed for central Alaska.

This map, compiled from geologic mapping conducted (1985-1992) by the U.S. Geological Survey as part of the Alaska Mineral Resource Assessment Program, builds upon previous USGS work unraveling the magmatic history of the Alaska-Aleutian Range batholith.

Spatial databases for map units, strike and dip, geologic contacts, faults, dikes, in addition to a topographic base map are provided in an Esri file geodatabase. The geologic mapsheet is also provided as a PDF.

Weka Dur is the largest gold occurrence in Afghanistan. Map reproduces the topology of original Soviet maps and cross sections. Original Russian terminology and rock classification translated into modern English geologic usage as literally as possible.

Geologic map at 1:500,000 scale, digitized from USGS I-1865. Includes mines, prospects, and occurrences, permissive tracts for several mineral deposit types, and gravity anomaly contours.

Mineral resource assessment of the Venezuelan Guayana Shield, including geologic unit map

Known deposits, thickness of potash-bearing units, and permissive tracts with estimates of undiscovered resources.

The region includes a significant part of one of the world’s largest accretionary complexes and a small part of the classic magmatic arc geology of the Alaska Peninsula. The map was compiled from existing mapping augmented by available new or revised data

This metal ore deposit formed over a period of time in which its tectonic setting was changing, consequently it shows a range of characteristics typical of several different types of deposits. Rock geochemistry data are provided in tabular form.

Chemical analyses of water and sediment samples, images depicting resistivity.

Uninterpreted geophysical measurements and geochemical and mineralogical analytical data from samples collected during the summer field seasons from 2007 to 2010. Data are available in a single Geographic Information System (GIS) database.

Data from more than 660 gravity stations, 100 line-km of truck-towed magnetometer traverses, and 260 physical-property sites in this area.

Detailed bathymetry, lake-floor acoustic imaging, and sample characteristics to infer bottom sediment characteristics.

Study focusing on the effects of historical mining on Forest Service lands in this area.

Germanium and indium are used in electronics devices, flat-panel display screens, light-emitting diodes, night vision devices, optical fiber, optical lens systems, and solar power arrays.

Database of large-tonnage, generally low-grade, hydrothermal deposits related to igneous intrusions emplaced at high crustal levels. Includes tri-partite classification based on deposit type, metal commodities, and source/host pluton chemistry.

Broad areas within the United States to target acquisition of geologic mapping, geophysical data, or detailed topographic information to aid research, mineral exploration, and evaluation of critical mineral potential. Data are provided in Esri file geodatabase, shapefile, Microsoft Excel, and CSV formats..

Explains process by which data on rock type, minerals, geochemistry, and geophysics were analyzed to identify the potential for any lode type of gold deposits in Alaska. Includes descriptive information on the types of lode deposits studied and the results obtained from the analysis.

For each deposit group, a map indicates relative density and certainty of favorable data. Tables list datasets used in analysis, parameters queried, their contribution to mineral estimates and allow further user analysis. GIS files enable spatial query.

Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.

Geochemical data for stratigraphic rock sequences containing dominantly fine-grained clastic rocks with appreciable organic carbon (above 0.5 weight percent), usually known as 'black shale facies examples' but including all fine-grained clastic rocks such as argillite, mudstone, claystone, and their low-medium grade metamorphic equivalents. Data are provide in Microsoft Access and tab-delimited text formats.

Chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States and from archetypal deposits from 27 other countries. Data are provide in Microsoft Access, Microsoft Excel, and CSV formats.

Regional locations and estimates of the probable amounts of undiscovered resources of copper, platinum-group elements, and potash in selected types of mineral deposits to depths of 1 to 3 kilometers below the surface of the earth worldwide.

Includes known resources and permissive tracts with estimates of the number of undiscovered resources likely to be present in the permissive tracts.

Geologic occurrence of rare earths, including mineralogy, type of deposit or occurrence, host rocks and alteration, and any quantitative data related to size and grade from publicly available data. 3,934 locations are described, including some locations for which precise geographic coordinates are not available.

Grain size distribution, photographic, and associated chemical and mineral analysis data for 36 sediment core and alluvium samples as well as SEM analysis on select grains from magnetic and heavy mineral separates collected in this area. Data are provided in CSV and JPEG formats with microprobe analyses presented as PDF reports with TIFF images.

Steelmaking and refractory applications in metallurgy use the largest amount of produced graphite; however, emerging technology uses in large-scale fuel cell, battery, and lightweight high-strength composites promise more uses.

Phytostabilization reduces the mobility of inorganic contaminants by establishing or enhancing plant growth. For small, remote, or abandoned mines, phytostabilization may reduce potential environmental hazards, provided plants can establish and grow. We grew a widespread perennial grass in mining wastes with and without soil and microbial amendments to determine whether we could improve plant establishment and growth. Data are provided in CSV format.

A collection of geoscientific data for this area, provided in the mid-1990s using file formats in common use at that time, which are now obsolete. Much of the data is now available in formats more convenient to users of the 2020s at mrdata.usgs.gov.

Scanned correspondence documenting the work of these programs, typically including information about the geology and mineralization reported at locations for which development assistance was sought.

Overview explaining how and why six different geochemical data sets were produced, and why you might choose to use the data in any one of these instead of the others.

Geochemical analysis of mine dumps, mill tailings, mine drainage, and surface waters indicate contamination from these historic mines is generally less than that asserted or suggested by some geochemical models

Imaging spectrometer radiance data were acquired at this open-pit mine. Resulting images are provided in a binary format with associated .hdr files.

Using geophysical and remote-sensing data, previously unrecognized targets of potential mineralization were identified; this report shows those targets along with the evidence for their potential.

Reflectance, mineral predominance, and white mica wavelength position data calculated from an airborne hyperspectral imaging survey of this area using a HyMap sensor in 2014. Data are provided in a format generated by the ENVI software product, CSV, and GeoTiff.

Geochemical data for pyrite crystals and native gold from two distinct vein sets in this area to better understand paragenesis of quartz veins in orogenic gold deposits. Data are provided in CSV format.

Major assessment of the environmental effects of historical mining in the Animas River watershed with GIS data files, tables, and plates.

Geological, geochemical, hydrologic, and biological observations combined with geographic framework data, supporting a multidisciplinary assessment of the impact of historic mining in this area.

Instrument, standard, and sample data from application of in situ laser ablation-inductively coupled plasma-mass spectrometry dating of scheelite in thin section, and sample data from isotope dilution thermal ionization mass spectrometry scheelite dating. Data are provided in CSV format.

Tables containing locations and lead concentrations of 998 surface-sediment geochemical sample sites

Geochemical data from selected USGS projects from the 1960s-1980s that were previously not published as digital data. Includes geochemical analyses from 36,498 samples of various types using analytical methods and instruments that were current when those studies were carried out. Data are provided in Microsoft Access, shapefile, and CSV formats.

Approximately 400 young children have died and thousands more are affected. This study clarifies lead sources and exposure pathways, identifies other toxicants of concern and people at risk, and examines potential for similar lead poisoning globally.

Lithium, the lightest of all metals, is used in air treatment, batteries, ceramics, glass, metallurgy, pharmaceuticals, and polymers.

GeoTIFF rendition of locally enhanced ALOS image mosaics for the Haji-Gak mineral district, which has barium and limestone deposits.

Regional-scale geochemical survey designed to serve as a baseline for further analyses, and to understand effects of historical mining in the area.

Analyses of about 900 samples by ICP-MS, ICP-AES, and hydride generation-atomic absorption spectrometry. The samples collected in 2005 were also analyzed by a cold vapor-atomic absorption method for mercury.

Uranium and lead isotope ratios from (1) scheelite from ore deposits near Mallnock, Austria, (2) wolframite from the Wolfram Camp mine, Australia, and (3) scheelite from the Andrew Curtis mine near Los Angeles, California. Data are provided in CSV format.

Manganese is used to make steel, where it serves as a purifying agent in iron-ore refining and as an alloy.

Comparison of the locations reported for these mineral deposits with mapped geologic units likely to host them; information comes from three different source compilations.

This map covers the Eagle 1:250,000-scale quadrangle in the northeastern part of the Yukon-Tanana Upland in Alaska. It shows the extent of five major glacial advances, former glacial lakes, and present fragmented terrace deposits related to the advances.

This 1:100,000-scale digital geologic map details the complex early Proterozoic granitic rocks, early Proterozoic supracrustal metamorphic rocks, and Archean crystalline basement of the Black Hills.

Map includes GIS data for magnesium-rich ultramafic rocks

Geochemical analyses of silicate melt inclusions, host quartz phenocrysts, and biotite phenocrysts in samples of these rocks. Data are provided in CSV format.

Summary of data obtained from field sampling of mine tailings and waste rock and water and sediment in regional springs and tributaries that drain from the mine area into Bear Creek. Ground-water springs are also potential sources of mercury here.

Gridded data from aeroradiometric surveys of Alaska.

Initial results of a petrographic, geochemical, and isotopic study of Mesozoic intrusive rocks and spatially associated Zn-Pb-Ag-Cu-Au prospects in the area.

Mineral abundances within bulk and size-fractionated mine waste from sampled historical waste piles from this area. Data are provided in CSV format.

Locations of mines, mineral occurrences, and mining districts in this area of active gold mining, with additional information such as commodity, geology, deposit types, activity status, deposit resources, and mine production. Extent of surface workings is also included. Data are provided in Esri file geodatabase, shapefile, Microsoft Excel, and CSV formats.

Discussion of the rocks and mineral deposits in this area, including grade and tonnage estimates, with a small amount of geochemical measurements.

Summary of geology and mineral resources of the state, both current and potential. Includes data drawn from existing inventories of mines and prospects, mining related features, and abandoned mine lands.

Results of magnetic susceptibility (MS) measurements and magnetic mineralogy of sediments sampled in three cores from the south basin of Great Salt Lake

X-ray diffraction and electron microscopy analyses of drill core samples that typify the uranium-copper ore bodies of the Canyon deposit, to understand mineral deposits of this type. Data are provided in Microsoft Excel, CSV, and PDF report formats.

Geochemical and mineralogical measurements of 819 samples of heavy mineral concentrates. Data are provided in CSV format.

This report releases data for waters in which naturally occurring acid-rock drainage occurs but acid-mine drainage from historical mining continues to contribute dissolved metals further degrading preexisting water quality.

Oxidation state and bonding environment of Ge in minerals within mine waste from sampled historical waste piles from this area. Data are provided in CSV format.

Data from a combination of analytical techniques providing detailed mineralogical and chemical analysis, to understand the mechanisms controlling geologic enrichment in germanium in ores that are crucial for maintaining a sustainable supply of this critical mineral commodity. Data are provided in CSV format.

Geochemical analysis of drill core samples from this rock unit to facilitate geologic studies of sediment-hosted stratiform copper deposits. Data are provided in Microsoft Excel and CSV formats.

Geochemical data generated during mineral and environmental assessments for the Bureau of Land Management in northern Nevada, northeastern California, southeastern Oregon, and southwestern Idaho.

Geochemistry of concentrates from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are from the continental US and Alaska.

Geochemical analysis of sediment samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are of stream sediment in the continental US and Alaska.

Geochemical analysis of soil samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are from the continental US and Alaska.

National-scale geochemical analysis of stream sediments and soils in the US, from existing data, reanalysis of existing samples, and new sampling. Goal for sample density is one per 289 square km.

Gridded geophysical data in a variety of formats.

Geologic occurrence of potential sources of crushed stone and sand and gravel for use as natural aggregate. A summary of the natural aggregate industry is also included. Data are provided in Shapefile format.

Niobium and tantalum are found together in nature because they have similar physical and chemical properties. Niobium is used in high-strength steel alloys, while tantalum is used in electronic capacitors.

One hundred years of historical mining has resulted in substantial ongoing input of cadmium, lead, and zinc into the environment. This surficial-soil sampling and coring study provides information needed to support remediation efforts.

Sample locations, location descriptions, lithology, mineralogy, and geochronological relationships of drill holes that penetrated the buried Precambrian basement in this area. Detailed well log and cutting descriptions are included if available. Data are provided in Microsoft Access and tab-delimited text formats.

Describes the methods, procedures, and fundamental reference information that were used throughout the assessment.

Analytical results for Pb-concentrations and isotopic ratios from about 150 samples of soil A horizon and about 145 samples of soil C horizon collected along a 4000-km east-west transect across the USA.

Locations of known phosphate occurrences in this area, with geologic units in which such deposits may occur.

Locations of known phosphate occurrences in this area, with geologic units in which such deposits may occur.

A collection of photographs of mine sites, mining operations, and tailings taken prior to 1980 at a variety of sites throughout Colorado and Utah.

Rock density and magnetic susceptibility measurements of samples drawn from this area. Data are provided in CSV format.

The platinum-group elements (PGEs)—platinum, palladium, rhodium, ruthenium, iridium, and osmium—are metals that have similar physical and chemical properties and tend to occur together in nature. PGEs are indispensable to many industrial applications.

Study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

Delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

Geochemical analyses of rock, mine waste, sediment, and soil samples collected from this area. Data are provided in CSV format.

Geochemical analyses of rock, mine waste, sediment, soil, and water samples collected from this area. Data are provided in CSV format.

This map is intended to promote further understanding of the geology and structure in the region by serving as a basis for geophysical interpretations and by supporting geological mapping, water-resource investigations, and various topical studies.

This map portrays the geology of Early Proterozoic rocks deposited along the southern margin of the Archean Superior craton during the Penokean orogenic cycle in northern Michigan and Wisconsin.

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Description and estimated amounts of resources with supporting data for use in GIS

Water properties and water chemistry in an area containing abandoned mines where mine drainate is a concern.

Study of selenium in sample materials from these abandoned mines with mineralogical analysis as well.

GIS data that map potential for tungsten skarn mineralization in permissive tracts in the Yukon-Tanana Uplands, Eastern Alaska, along with tables listing keywords and procedures used to produce the permissive tracts and score them for mineral potential. Data are provided in Esri file geodatabase, shapefile, KML and CSV formats.

Geochemical data for stream water, sediments, and mine tailings in this area

Results from sediment cores collected during 1997-1999 oxbow lakes and beaver ponds to assess impact of historic mining and exposed mineral deposits on the quality of the water and the aquatic and riparian habitats.

Geological setting, characteristics of the deposit itself, and detailed geochemical analyses of rocks in and around the deposit.

This inventory consists of 384 REE-RM occurrences, including 160 in Kazakhstan, 75 in Kyrgyzstan, 60 in Tajikistan, 2 in Turkmenistan, and 87 in Uzbekistan with location, mineral deposit type, geology, production, resources, and development status. Data are provided in Microsoft Excel and shapefile formats.

Detailed descriptions of more than 200 mineral districts, mines, and mineral occurrences (deposits, prospects, and showings) within the United States that are reported to contain substantial enrichment of rare earth elements.

Explains the occurrence of rare earth elements in coal and coal fly ash, with notes on the potential for recovery of these elements as resources.

Because of their unusual physical and chemical properties, the REEs have diverse defense, energy, industrial, and military technology applications including glass, petroleum refining, automobiles, and magnets.

Reanalysis of existing samples provides more precise and accurate geochemical data because newer methods can be used. Stable isotopes of lead were also included. Data are provided in Microsoft Access, CSV, and shapefile formats.

New analysis of existing samples from this area, to improve precision and accuracy and consistency of the measurements with those made on newly-collected samples. Data are provided in Microsoft Access, Microsoft Excel, CSV, and shapefile formats.

Reanalysis, using modern methods, of nearly 60,000 NURE-HSSR archived samples collected over parts of Arizona, California, Idaho, Montana, Nevada, New Mexico, and Utah.

Updated bedrock geologic mapping of the area incorporating a recent airborne geophysical survey, new field work, fossils, radiometric ages, and geochemical signatures. Includes GIS data.

A geologic map constructed primarily from reconnaissance studies from the 1950s to 1990s. The rocks of the map area range from Proterozoic age metamorphic rocks of the Kanektok metamorphic complex to Quaternary age mafic volcanic rocks of Nunivak Island.

The site, on the Wind River Indian Reservation, has Eastern Shoshone and Northern Arapahoe tribes concerned about groundwater and soil contamination. This effort studies geochemical soil variation and compares concentrations with levels established by EPA

Major and trace element geochemistry for 10 rock samples whose locations are not specified, with data from Argon-Argon analysis supporting geochronological data.

Multi-chapter report combining geologic, geochemical, geophysical, and mining activity data. Downloadable data for coal resource information only.

Small regional scale geochemical mineral exploration results from field studies in Duncan Canal, Zarembo Island, and western Etolin Island.

Mine tailings here have high levels of arsenic. Experiments conducted on these sediments indicate that the arsenic can be released into the environment and become hazardous through chemical processes that occur when fine sediment is ingested by animals.

Detailed study of mine waste material and sediments from streams passing through it. Arsenic is the main contaminant of interest here.

Data from field sampling of mine tailings, wasterock, sediment, water, and biota at the mine in 2010. Results permit a preliminary assessment of the mining sources of Hg and associated chemicals that could produce elevated levels of monomethylmercury.

Rhenium is a rare metal that has an extremely high melting point and a heat-stable crystalline structure. It is used in high-temperature superalloys, to make turbine blades for jet aircraft engines and is a catalyst for petroleum refining.

Mining districts, mines, and mineral occurrences (deposits and prospects) within the United States that are reported to contain enrichments of rhenium (Re)

This study area encompasses the greatest sediment-hosted copper-cobalt province in the world, containing 152 million metric tons of copper in greater than 80 deposits.

This report describes key features; identifies tectonic-sedimentary environments; illustrates geochemical, geophysical, and geoenvironmental characteristics; evaluates deposit formation; presents exploration and assessment guides; and lists knowledge gaps

Selenium is a trace element in Earth's crust. Modern uses for selenium include energy-efficient windows that limit heat transfer and thin-film photovoltaic cells that convert solar energy into electricity.

Results from sequential extraction experiments and the quantitative mineralogy for samples of stream sediments and mine wastes collected from metal mines.

Geochemical analyses of solid mill tailings and other ore processing materials from worldwide localities, and leachates from those samples. Data are provided in CSV format.

Geochemical and mineralogical analysis of uranium-bearing sandstone in order to help understand mineral deposits of this type.

Geologic map information in GIS formats

Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format

Images of graphic drill core logs showing associated drill core information, an image of the explanation for the lithology and structure sections of the logs, the locations of the drill holes, and tabular data compiled from handwritten drill core logs. Data are provided in TIFF and CSV formats.

Analysis of stream sediments to assess the geochemistry, in particular the mercury and selenium contents, of mining-impacted sediments in the study area

New analyses of 1,075 previously collected stream sediment samples, measuring more elements with better precision. Includes arsenic, gold, palladium, and platinum and 55 major, rare earth, and trace element concentrations.

New data for 366 previously collected stream-sediment samples, because recently developed analytical methods can detect additional elements of interest and have lower detection limits than the methods used when these samples were originally analyzed.

Structural measurements taken from this area and surface traces of the structural measurements. Data are provided in shapefile format.

Sulfur isotope analyses of chalcopyrite from a base metal deposit in this area. Rock samples were collected from outcrops, and chalcopyrite was separated for analysis by hand picking. The data are provided in CSV format.

Grids representing the copper-nickel-platinum group element mineralized zone found in these intrusions. Includes elevation of the bottom and top of the zone, and measures of the thickness of the zone. Data are provided in Esri Grid and CSV formats.

Electron microprobe geochemical data to evaluate whether unconventional critical element resources may be associated with sediment-hosted copper systems in this area. Data are provided in CSV format.

Electron microprobe analyses of ore minerals from this deposit in the Upper Peninsula of Michigan. Minerals include bornite, chalcocite, native copper, native silver, and pyrite, analyzed for Ag, As, Co, Cu, Fe, Hg, Ni, Pb, S, Sb, and Zn. Data are provided in CSV format.

Tellurium is a rare element obtained as a byproduct of mining for other commodities whose main uses are in photovoltaic solar cells and as an additive to copper, lead, and steel alloys in various types of machinery.

This report is a compilation of water and sediment chemical data generated by the USGS study of indigenous, arsenic-sequestering microbial communities. A total of 9 synoptic sampling efforts conducted at specific sites are described.

Data generated by aerial sensing of radiation emanating from the earth's surface provides general estimates of the geographic distribution of Uranium, Thorium, and Potassium in surficial and bedrock units. Covers the conterminous United States, southeaste

Flight-line databases and derived grids from aeroradiometric surveys across the US carried out during the 1970s

A collection of state geological maps using the same underlying database structure. Updates the preliminary state geologic map compilation released in 2005, with corrections and seven updated state geologic maps as well as seven new state geologic maps.

Data to determine the distribution of uranium deposits, breccia pipes, and collapse features and define areas permissible for uranium-bearing breccia pipes in northern Arizona and southeast Utah. Data are provided in shapefile format.

Tin (Sn) is one of the first metals to be used by humans. Almost without exception, tin is used as an alloy. Its major uses today are for cans and containers, construction materials, transportation materials, and solder.

Titanium colors paint, paper, plastic, rubber, and wallboard. Because of its strength and corrosion resistance, titanium metal and its alloys are used in the aerospace industry as well as for welding rod coatings, biological implants, and consumer goods.

Time-domain electromagnetic (TEM) soundings were made in this area to map the location of a blue clay unit as well as suspected faults. Data are provided in CSV and shapefile formats.

Geochemical, geophysical, geological, and mineral resource data supporting an assessment of undiscovered tungsten skarn deposits in this area. Permissive tracts and other information derived from the analysis are provided in shapefile, CSV, and Esri file geodatabase formats.

<p id="sp0015">The ore-genesis model for world-class deposits of the Butte mining district, Montana, USA, is deep pre-Main Stage porphyry Cu-Mo and overlying Main Stage Ag-Zn-Cu zoned-lode deposits, both of which formed from hydrothermal fluids driven by

Geochronological analysis of radiogenic isotopes in rocks in this area to understand the history of formation of the rocks and may provide insight to mineral resource formation. Data are provided in CSV format.

Comparative LA-ICPMS U−Pb dating results for zircon and cassiterite in these deposits to help understand how critical elements, like tin, are enriched in rare-metal granites. Data are provided in CSV format.

Uranium and Thorium concentration and isotopic ratios of Uranium, Thorium, and lead in 469 cassiterite (SnO2) samples collected in the underground Sullivan Mine near Kimberley, British Columbia. These measurements improve the estimates of the timing of cassiterite ore mineralization in a classic sedimentary exhalite mineral deposit.

Radiometric age measurements on mineral components within this large but undeveloped mineral deposit, to help understand its geologic history. Data are provided in CSV format. Locations are provided in shapefile format.

Radiometric ages from zircons in this area are used to investigate changes in provenance in this region as a result of a changing hydroclimate and tectonics. Data are provided in CSV format.

The Farewell terrane is an exotic continental fragment in interior Alaska that during the early Paleozoic was the site of a passive margin. We report a ²³⁸U/²⁰⁶Pb zircon age of 432.9±3.0 Ma from a Farewell terrane ash in Mt. McKinle

Uranium-lead isotopic data and the crystallization age of zircon from a metamorphic rock from this area for geochronologic analysis. Data are provided in CSV format.

Radiometric ages determined from analysis of zircon crystals in this area where mineral deposits are found. Data are provided in CSV format.

Explains the goals of this scientific research program and the methods by which USGS carries out this research.

Improved information on deposit model (type) in records of this older USGS database describing sites that are located in California. Includes a list of additional deposit types needed to properly categorize the California locations. Data are provided in Microsoft Excel, CSV, and Esri personal geodatabase (Microsoft Access) formats.

Geochemical analysis of stream waters and sediments in mountainous areas immediately west of Denver, Colorado, to evaluate the concentration and distribution of uranium-bearing acid drainage originating from historical mines

Geochronological and geochemical data for rocks in this area. Data are provided in CSV format.

U.S. Geological Survey (USGS) scientists have completed an assessment of the mineral-resource potential of nearly 10 million acres of Federal and adjacent lands in Idaho, Montana, Nevada, Oregon, Utah, and Wyoming. The assessment of these lands, identifie

A developing national-scale geospatial database that will be an authoritative source of information on the most important mines, mineral deposits, and mineral districts of the United States.

Locations of mineral occurrences, mines, mining and mineral districts and sites of active mineral exploration within or near the Department of the Interior (DOI) Sagebrush Focal Areas in Montana, Wyoming and Utah, central Idaho, and the Oregon-Nevada-Idaho border area. Data are provided in Esri file geodatabase and shapefile formats.

Vanadium is used primarily in the production of steel alloys; as a catalyst for the chemical industry; in the making of ceramics, glasses, and pigments; and in vanadium redox-flow batteries (VRBs) for large-scale storage of electricity.

Investigates Cr and Ni geochemistry providing insight into the mobility and bioaccessibility of these toxic trace elements throughout northern California and perhaps the origin of elevated dissolved Cr(VI) concentrations in the western Sacramento Valley

X-ray diffraction data on sediment core samples collected in this area to inform aquifer sediment composition, mineralogical composition of operationally defined size fractions, and geochemical modeling. Data are provided in CSV format.

Mineralogical and geochemical analysis of samples of this industrial waste material to help understand effects on human health of exposure to these materials. Data are provided in CSV format.

Relational database describing 102 materials from the early 1800s to circa 2017 through anthropogenic cycles, their recycling and criticality properties, and on spatial scales ranging from suburbs to global. Provided as MySQL, PostgreSQL, and CSV formats.

Geochemical analyses of zircons in this area. Data are provided in CSV format.

Zirconium and hafnium are corrosion-resistant metals that are widely used in the chemical and nuclear industries. Most zirconium is consumed in the form of the main ore mineral zircon or as zirconium oxide or other zirconium chemicals.