San Juan



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Automated mapping of mineral groups and green vegetation from Landsat Thematic Mapper imagery with an example from the San Juan Mountains, Colorado

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.

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Resource potential and geology of the Grand Mesa, Uncompahgre, and Gunnison (GMUG) National Forests and vicinity, Colorado

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

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Net acid production, acid neutralizing capacity, and associated geophysical, mineralogical, and geochemical characteristics of Animas River watershed rocks near Silverton, Colorado

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

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Hydrogeochemical investigations of historic mining districts, central western slope of Colorado, including influence on surface-water quality

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

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Net acid production, acid neutralizing capacity, and associated mineralogical and geochemical characteristics of Animas River watershed igneous rocks near Silverton, Colorado

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

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Temporal geochemistry data from five springs in the Cement Creek watershed, San Juan County, Colorado

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

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Radionuclide data and calculations and loss-on-ignition, X-ray fluorescence, and ICP-AES data from cores in catchments of the Animas river, Colorado

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.

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Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan mountains, Colorado

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

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Integrated investigations of environmental effects of historical mining in the Animas River watershed, San Juan county, Colorado

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

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Description and validation of an automated methodology for mapping mineralogy, vegetation, and hydrothermal alteration type from ASTER satellite imagery with examples from the San Juan Mountains, Colorado

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

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Geochemical data from waters in Prospect Gulch, San Juan County, Colorado, that span pre- and post-Lark Mine remediation

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.

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Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado

<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

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Magnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2019

Magnetotelluric station locations and data intended to help to characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and also to improve knowledge of deep geologic structures that may have been conduits for hydrothermal fluids that formed mineral deposits.

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High resolution helicopter-borne magnetic and electromagnetic survey Eureka Graben area, Colorado September 1999

Survey parameters, data acquisition and processing procedures, and products of a 1999 airborne geophysical survey of this area. Data provided in GXF format and binary formats.

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Shapefiles to accompany Colorado Mineral Belt revisited

Based on detailed information on the location of the Tertiary intrusions and mineral deposits, and on the control provided by the Proterozoic structures, all superimposed using GIS, a new outline of the Colorado Mineral Belt is proposed. Older representations are included for comparison. Data are provided in shapefile format.

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Magnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018

Magnetotelluric sounding data collected in July 2018 in the Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field to understand the geologic structure of this area.

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Digital map of iron sulfate minerals, other mineral groups, and vegetation of the San Juan Mountains, Colorado, and Four Corners Region derived from automated analysis of Landsat 8 satellite data

Multispectral remote sensing data acquired by the Landsat 8 Operational Land Imager (OLI) sensor were analyzed using a new, automated technique to generate a map of exposed mineral and vegetation groups in this area. Results are provided in ERDAS Imagine format.

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Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2019

Audiomagnetotelluric station locations and data to characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and also to improve knowledge of deep geologic structures that may have been conduits for hydrothermal fluids that formed mineral deposits.

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Global Geochemical Database for Critical Minerals in Archived Mine Samples

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.

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Hydrologic reconnaissance to identify areas of emergent groundwater, Mineral Creek, near Silverton, Colorado, June 2020

Results of a field survey of emergent groundwater in this area to help characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and to improve knowledge of shallow to deep faults and vein-structures that were conduits for hydrothermal fluids that formed mineral deposits. Data are provided in KML, CSV, and shapefile formats. Images of the locations are provided in JPEG format.

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Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019

Airborne electromagnetic and magnetic survey data were collected during 2019 along 1,467 line-kilometers in this area. The survey was flown at a mean flight height of 140 meters (m) above terrain and line spacings ranging from 150 m to 600 m. Data are provided in CSV and shapefile formats.

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Tungsten Deposits in the United States (ver. 2.0, August 2020)

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.

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U-Pb detrital zircon data for: Select Pennsylvanian-Triassic sedimentary rocks from Colorado

Geochronological data to understand the history of these rock formations. Data are provided in CSV format.

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U-Pb detrital zircon data for: lower Paleozoic sedimentary rocks near Silverton, CO USA

Laser ablation ICPMS U-Pb detrital zircon geochronology data to supports mapping and stratigraphic interpretations of this area. Data are provided in CSV format.

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Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018

Audiomagnetotelluric sounding data collected in 2018 in this area to understand subsurface geologic structure.

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