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

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.

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.

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.

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.

Identifies hydrothermally altered volcanic edifices and vulnerable areas downstream by mapping alteration on volcanoes, highlighting lahar prone watersheds using Global Digital Elevation Model data, and modeling via a lahar flow-fill modeling program

Descriptive mineral deposit model, with locations of known deposits of this type and a few site characteristics.

Electron probe data collected for apatite, rutile, and titanite to fingerprint porphyry-style mineralization near the Taurus deposit in eastern Alaska. Data are provided in CSV format.

Data from pipelines from 2012-2015, includes water chemistry of the acid mine drainage, mineralogy of pipe scale (by X-ray diffraction and chemical extractions), and laboratory experiment results. 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.

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

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.

Sulfur and carbon isotope compositions, concentrations of selected elements, and concentrations of pyrite sulfur and organic carbon in mudstone samples collected from five cores drilled in this area. Data are provided in CSV format.

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.

Descriptive mineral deposit model, with locations of known deposits of this type and a few site characteristics.

Map includes GIS data for magnesium-rich ultramafic rocks

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

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

Isotopic composition and calculated geochronology in order to date the mineralizing events in these hydrothermal systems. Data are provided in CSV format.

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

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

The report presents new maps from data collected in 2007 and the processing steps applied to that data. The maps are being used for natural resource development and to prioritize study areas of mineral distribution to assist with economic revitalization.

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.

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.

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.

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.

Map interface and data download of VMS data including KML and GIS data formats

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.