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.

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.

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

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 of 72 water samples include pH, conductivity, water temperature, major cation and anion concentrations, trace-element concentrations, and dissolved organic-carbon concentrations.

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.

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.

The Southern High Plains (SHP) is a new and emerging U.S. uranium province. Here, uranyl vanadates form deposits in Pliocene to Pleistocene sandstone, dolomite, and limestone

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

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

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.

Regional data for pH, alkalinity, and specific conductance for stream waters and a multi-element geochemical dataset for stream sediments collected in the New England.

This map sheet with accompanying Geographic Information System (GIS) project is an update of the existing U.S. Geological Survey (USGS) Conterminous U.S. Coal Fields map compiled using data primarily from the USGS National Coal Resource Assessment (NCRA).

Geologic and mineral resource information for 1635 deposits of phosphate worldwide

Geochemical, petrographic, and geochronologic data for samples, principally those of unmineralized Tertiary volcanic rocks, from the Tonopah, Divide, and Goldfield mining districts of west-central Nevada.

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.

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

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

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.

This report makes available a large well dataset so that subsurface stratigraphic data are available in digital form for use within a GIS and in construction of three-dimensional models to address regional stratigraphic and structural questions.

This paper reports on a methodology that is used with estimates of undiscovered copper resources to evaluate the likely contribution that the predicted resources will make to mineral supplies in the foreseeable future.

Geochemical analysis of 47 elements in more than 700 soil samples that appeared to be unaffected by mineralization or anthropogenic contamination.

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.

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

Distribution of fluorine in specific age-lithologic categories, ranging from precambrian metamorphic rocks to modern soils.

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.

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.

Results of analysis in tabular form

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 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.

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.

Regional samples of rock, sediment, leachates, and water were collected in and around the TCL site and analyzed for major and minor elements and radionuclides

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.

Whole-rock geochemistry, X-ray diffraction, and electron microscopy analyses of samples collected from the uranium ore bodies of two mined-out deposits in this area to understand the formation of this type of mineral deposit. Data are provided in Microsoft Excel, CSV, and PDF reports.

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.

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

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.

Geochemical analyses of bedrock, soil, streambed sediment, and surface-water samples were collected and analyzed in three watersheds that cross the basal part of the Duluth Complex, northeastern Minnesota to document regional water quality in areas of potential base-metal mining, Data are provided in Microsoft Excel and CSV formats.

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.

Geochemical data for stream sediment, surface-water, rock, precipitate, and vegetation samples from Red Mountain

Study of sources and resulting transport of radionuclides and other dissolved constituents in the surrounding ground water.

Groundwater geochemistry data from samples that were collected in June 2011 to better understand the hydrogeologic system in the area surrounding the proposed mine site.

Water samples near this abandoned mine were analyzed for specific conductance, pH, temperature, and dissolved oxygen with handheld field meters, and metals were analyzed using inductively coupled plasma-mass spectrometry.

Chemical analyses for 46,955 samples collected in the Great Basin Tungsten assessment area, extracted from the USGS National Geochemical Database. Data are provided in Microsoft Access, Microsoft Excel, and tab-delimited text formats.

Compilation of all available chemical data (more than 2,000 samples) for igneous rocks that constitute the southern segment of the ancestral Cascades magmatic arc.

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.

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

This report presents and makes data available to ongoing petrogenetic investigations of these rocks. It develops an accurate and current portrayal of their spatial distribution in GIS format while analyzed samples are presented via Excel workbooks.

Chemical and mineralogical results of a soil study conducted in the lower Rio Grande valley, Texas. 210 samples were collected from soils formed on Holocene alluvial flood-plain and distributary channel deposits of the river valley.

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

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, geochronologic, and isotopic data for zircons and zircon-hosted melt and mineral inclusions in order to asses the genesis of the Pea Ridge iron oxide-apatite deposit and related centers in this terrane. Data are provided in Microsoft Excel 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.

Compilation of isotopic and fission track age determinations, some previously published. Data for the tephrochronology of Pleistocene volcanic ash, carbon-14, Pb-alpha, common-lead, and U-Pb determinations on uranium ore minerals are not included.

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.

Contains geologic, gravity anomaly, and aeromagnetic anomaly maps and the associated geologic and geophysical databases (ArcMap), as well as complete descriptions of the geologic map units and the structural relations in the mapped area.

Tabular presentation of mineral activities for mining and exploration in Washington during 1985 to 1997.

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.

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

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.

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.

Includes data on mineral deposit locations and geochemical analyses

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.

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.

Existing and new gravity station data and magnetometer measurements used to infer geologic structure of this area

Gravity and aeromagnetic data analysis described in a report, with a few physical property analyses

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

Gravity station data and physical property measurements used to infer subsurface geologic structure

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.

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

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.

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.

Locations of focus areas to be used for planning and collection of geophysical, geological, and topographic (lidar) data pertaining to the study of rare earth element resources in the US.

Broad areas within the United States to target acquisition of geologic mapping, geophysical data, geochemical analysis, or detailed topographic information to aid research, mineral exploration, and evaluation of critical mineral potential in these areas.

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..

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.

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.

Report with gravity station data in a spreadsheet

Report with generalized interpretation and Excel tables of gravity and physical property data including an explanations of their formats.

Gravity station data, isostatic anomaly map, and depth to basement map derived from geophysical inverse modeling.

321 observed gravity values with free-air, simple Bouguer, and complete Bouguer anomaly values; high-precision relative-gravity surveys repeated over time, useful for aquifer-storage-change monitoring; and absolute gravity values for use as base stations.

Data on the southern portion of the Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms and the Yucca Valley-Joshua Tree-Twentynine Palms area and presents the map and basin analyses.

Aerial, truck-towed, and hand-held magnetometer measurements, gravity station data, and sample density and magnetic susceptibility measures

Electromagnetic, resistivity, and magnetic surveys used to determine the extent of contamination in an abandoned mine area.

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

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.

Reconnaissance summary and survey of 1118 indium analyses of a diverse suite of minerals, including monomineralic and polymineralic ores and mineral concentrates, from 12 mineral-deposit types, principally zinc-lead deposits, from 16 countries.

Extensive commentary but minimal location information for more than 4000 mineral exploration targets worldwide, by year.

Contour map of isostatic gravity anomaly with bedrock geology, and principal facts for the gravity stations as a separate data file.

Data represent work completed when the study ended due to lack of funding. Geologic and site information on each specific deposit or occurrence are provided. Analytical and geologic data are summarized and site descriptions for samples analyzed are listed

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.

Chemical analysis of 201 samples of rocks thought to be altered or mineralized in an area containing numerous mines.

Magnetic and gravity investigations were undertaken in Mono Lake to study regional crustal structures and to aid in understanding the geologic framework, in particular regarding potential geothermal resources and volcanic hazards throughout Mono Basin.

Magnetic susceptibility measurements with statistical analysis

In-place rock magnetic susceptibility measurements for 746 sites are reported in a database. These data, collected from 1991 through 2012, are intended to help improve geophysical modeling of the Earth’s crust in the Western United States.

The purpose of this report is to release one north-south and two east-west regional magnetotelluric sounding profiles collected where drillhole data are sparse. No interpretation of the data is included.

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

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

Spreadsheets containing geochemical data for soils

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.

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.

This report contains explanatory material and summary tables for lode mineral deposits and placer districts and metallogenic belts of Northeast Asia.

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

This map displays over 1,500 records of mineral facilities throughout the continent of Asia and the countries of the Pacific Ocean. Each record represents one commodity and one facility type at a single geographic location. Facility types include mines, o

This map displays over 1,700 records of mineral facilities within the countries of Europe and western Eurasia. Each record represents one commodity and one facility type at a single geographic location. Facility types include mines, oil and gas fields, an

This map displays almost 900 records of mineral facilities within the countries that formerly constituted the Union of Soviet Socialist Republics (USSR). Each record represents one commodity and one facility type at a single geographic location. Facility

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.

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.

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.

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

Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats.

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.

Morphological data on fibrous mineral particles from an old vermiculite mine that has been a subject of environmental health investigations

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.

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.

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

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.

Density and magnetic susceptibility measurements to assist in interpretation of gravity and magnetic anomaly data

This study summarizes the identified mineral inventory of PGE in South Africa and Zimbabwe and estimates the potential amount of undiscovered PGE resources that may be present in these countries.

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.

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.

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.

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

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

Map with excel tables showing principal facts (gravity observation data).

Gravity station data from three separate surveys

Includes 2,604 (170 not previously published) gravity station measurements with calculations of free-air, simple Bouguer, complete Bouguer, and isostatic anomaly.

The purpose of the data collection was to investigate possible changes in gravity across mapped Quaternary faults and to improve regional gravity coverage, adding to the existing national gravity database.

Data collected as part of a geological and geophysical framework study

Gravity observations from 99 locations in this area, with free-air, isostatic, and complete Bouguer anomalies.

Regional tracts of land where the geology is permissive for the occurrence of undiscovered porphyry copper deposits, with probabilistic estimates of undiscovered resources, along with tables of discovered deposits and prospects.

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.

Analysis of soil samples in the Texas borderland area

This dataset contains location, geologic and mineral economic data for world rare earth mines, deposits, and occurrences. The data in this compilation were derived from published and non-published sources.

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.

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.

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

Geochemical analysis and characteristics of bauxite deposits in this area.

Measures of quality for each of 304,643 records in the Mineral Resources Data System (MRDS) database. This analysis is intended to separate records that describe those resources well and are trustworthy from those that lack fundamental information or cannot be verified easily. Data are provided in tab-delimited text, Microsoft Excel, and SQLite. PHP code used to carry out the analysis is included for reference.

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.

Currently (2011) asbestos is not mined commercially in the US. This shows where it has been found or mined in the past.

Currently (2011) asbestos is not mined commercially in the US. This data set shows occurrences and historic mines.

Map and data tables show location, mineralogy, geology, and relevant literature for each mine, prospect, or occurrence

Currently (2011) asbestos is not mined commercially in the US. This data set shows occurrences and historic mines, and includes information on talc deposits.

Location, mineralogy, host rocks, and references for 51 natural occurrences of asbestos in Washington and Oregon, using descriptions found in the geologic literature.

Site-by-site information on 876 natural occurrences of asbestos reported within the conterminous US. Includes location, mineralogy, geology, and relevant literature for each asbestos site. Data are provided in Microsoft Excel, shapefile, and CSV formats.

Currently (2011) asbestos is not mined commercially in the US. This data set describes historical mines and occurrences.

Data in this report will be used to better understand the processes that control epithermal mineral-deposit formation by attempting to relate the geochemistry of the primary structures that hosted hydrothermal fluid flow to their heat and fluid sources.

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

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

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

Data on a variety of mineral deposit types that have variable environmental effects when exposed at the ground surface by mining or natural processes.

Data for a geochronologic study of Mesoproterozoic rocks in this area. Zircon, plus one sample of titanite, from fifty samples of metaigneous rocks were dated by sensitive high resolution ion microprobe (SHRIMP). Data are provided in Microsoft Excel and CSV formats.

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.

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

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.

This data release consists of point data digitized from structural geologic orientation symbols consisting of mostly foliations and lineations from twenty-three geologic maps published between 1964 and 2009, primarily 7.5-minute, 1:24,000 scale quadrangles. Data are provided in Esri file geodatabase, shapefile, CSV, and Microsoft Excel formats.

Geochemical and mineralogical analyses of plutonic rock samples

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.

Seasonal geochemical data intended to understand formation of ferricretes and to help understand the ground-water flow system.

Geophysical modeling used to study mineral deposit geometry. Includes 227 new gravity stations.

Interpretation of aeromagnetic data, with geologic structure, to infer thickness and estimate capacity of an aquifer.

Information concerning 8- and 10-digit trade codes related to the rechargeable lithium-ion battery (LIB) supply chain for the People's Republic of China (PRC) and the European Union, and the United States as classified by Customs and Border Protection (CBP) rulings. Data are provided in Microsoft Excel 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.

<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

Data supporting a LA-ICPMS analytical procedure for dating cassiterite, a main ore mineral in tin deposits, with no need for an independently dated matrix-matched cassiterite standard. Data are provided in Microsoft Excel and CSV formats.

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

Geochronological data using several different techniques, for a multidisciplinary study of dikes, country rock, and alteration systems in which mineral deposits may form. Data are provided in Esri file geodatabase, shapefile, Microsoft Excel, and CSV formats.

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.

The report provides insight into the dependence of the United States on foreign supply to meet the country’s mineral needs. This overview highlights the importance of understanding what is happening at each point along the supply chain.

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

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

Information on VMS deposits from around the world with new grade and tonnage models for three subtypes of VMS deposits and data allowing locations of all deposits to be plotted using GIS.

This report releases data, cross section, and model information related to the identification of travel paths for groundwater supply and principal stratigraphic and structural features that serve as constraints or conduits for groundwater movement.

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

This report presents geochemical analyses for 220 mostly altered and mineralized rock samples from the Red Dog Zn-Pb-Ag district in the western Brooks Range of northern Alaska.

This report presents geochemical analyses for 210 unaltered and unmineralized rock samples of Paleozoic age in the western Brooks Range of northern Alaska.

Chemical analysis of geological materials at this EPA Superfund site located on lands of the Hopi and Navajo nations, which may contain mine waste.

The data consist of major- and trace-element whole-rock geochemical analyses and major- and trace-element analyses of sulfide minerals determined by electron microprobe and laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) techniques

Whole-rock major and trace element analyses of 51 samples of breccias, veins and thin dikes, and a variety of carbonatite, felsic, mafic, and ultramafic intrusions across the area to understand the mineralization of rare earth elements and thorium in this area. Data are provided in Microsoft Excel and CSV formats.

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.

Geochemical analysis of 74 samples for major-element oxides (SiO2, Al2O3, Fe Total, MgO, CaO, Na2O, K2O, TiO2, P2O5, and MnO) by X-ray fluorescence (XRF) conducted in the 1980s. Data are provided in Microsoft Excel, CSV, and DBF formats.