Scientific data near [39.31678,-119.63871]

Search area extends approximately 2.2 km east-west and 2.9 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Storey	county
Nevada	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Virginia City	quadrangle 1:24,000 scale
Carson City	quadrangle 1:100,000 scale
Reno	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Middle Carson	hydrologic unit
Carson	hydrologic accounting unit
Central Lahontan	hydrologic subregion
Great Basin	hydrologic region

Geology of US states

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

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Unit	State	Lithology
Older alluvium and alluvial fan deposits	NV	Pleistocene and Pliocene
Younger andesite and intermediate flows and breccias	NV	Miocene

Airborne geophysical surveys

Aerial surveys of magnetic anomaly and gamma ray emission; older surveys were analog record which have been digitized, newer surveys collected data in digital form.

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ID	Data type	Description
Comstock	M-D	Comstock 1641 line km with spacing 0.40 km over parts of NV
Reno	M/R-D	Reno 4787 line km with spacing 4.80 km over parts of NV-CA

Estimates of undiscovered mineral resources

National Mineral Resource Assessment 1998: Estimates of the number of undiscovered mineral resources of gold, silver, copper, lead, and zinc within identified permissive tracts (geographic areas in which mineral deposits may form).

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Tract	Deposit Type	Mineralization age
GB23	Epithermal vein, Comstock	Tertiary
GB18	Distal disseminated Ag-Au	Mesozoic - Tertiary
GB15	Polymetallic replacement + skarn Zn-Pb	Mesozoic - Tertiary
GB05	Skarn Au, truncated	Mesozoic - Tertiary
GB18	Distal disseminated Ag-Au	Mesozoic - Tertiary
GB02	Skarn Cu	Mesozoic - Tertiary
GB08	Porphyry Cu	Cretaceous
GB08	Porphyry Cu	Cretaceous
GB09	Porphyry Cu	Tertiary
GB10	Porphyry Cu	Jurassic
GB26	Epithermal vein, quartz-alunite	Tertiary
GB28	Hot-spring Au-Ag	Tertiary

The continental crust

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.

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Domain	Crust type	Region
Shoofly-Olds Ferry	Oceanic arc	Western Cordillera

National geochemical survey database

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.

Database Home

Sample ID	Material	Source
EQQ868	Sediment	Soil

Geochemistry of stream sediments in the US from the NURE-HSSR database

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

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Sample ID	Date collected	Sample type
5153439	1979-06-12	Soil sample sieved to less than 149 microns (-100 mesh).
5153440	1979-06-12	Soil sample sieved to less than 149 microns (-100 mesh).
5153441	1979-06-12	Soil sample sieved to greater than 149 microns (+100 mesh) but less than 1,000 microns (-18 mesh).

National Geochemical Database: Rock

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"

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Sample ID	Rock type	Rock name
D319283	igneous	HEMATITE
D319286	igneous
ERW121	igneous	intermediate
ERW206	igneous	intermediate
ERW207	igneous	intermediate
ERW218	igneous	intermediate
ERW281	igneous	intermediate
ERW303	igneous	intermediate
ERW304	igneous	intermediate
ERW305	igneous	intermediate
ERW308	igneous	intermediate
ERW309	igneous	intermediate
ERW310	igneous	intermediate
ERW311	igneous	intermediate
ERW312	igneous	intermediate
ERW313	igneous	intermediate
ERW314	igneous	intermediate
ERW315	igneous	intermediate
ERW317	igneous	intermediate
ERW318	igneous	intermediate
ERW319	igneous	intermediate
ERW328	igneous	intermediate
ERW332	igneous	intermediate
ERW333	igneous	intermediate
ERW334	igneous	intermediate
ERW335	igneous	intermediate
ERW336	igneous	intermediate
ERW337	igneous	intermediate
ERW338	igneous	intermediate
ERW339	igneous	intermediate
ERW340	igneous	intermediate
ERW341	igneous	intermediate
ERW342	igneous	intermediate

Mineral Resource Data System

MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic characteristics, production, reserves, resources, and references.

Database Home

Site name	Development	Commodities
Comstock Lode	Past Producer	AG AU CU PB ZN FE MN
C & C Shaft	Past Producer	AU AG PB CU ZN FE
Best & Belcher Mine	Past Producer	AG AU
Consolidated Virginia Mine	Past Producer	AG AU CU PB ZN FE
Sierra Nevada Mine	Past Producer	AG AU CU PB ZN FE
Union Mine	Past Producer	AG AU PB CU ZN FE
California Mine	Past Producer	AG AU CU PB ZN FE
Ophir Claim	Past Producer	AG AU PB ZN CU FE
Scarpion Shaft	Past Producer	AU AG
Best & Belcher	Prospect	AU AG
Union Shaft	Past Producer	AU CU AG
Mexican Shaft	Past Producer	AU AG
Con. Virginia Shaft	Past Producer	AU AG
Sutro Mine	Past Producer	AG CU AU
Upper Ophir Mine	Prospect	AU AG
Hardy Mine	Prospect	AU
Scorpion Shaft	Prospect	AG
C & C Shaft	Past Producer	AU AG
Sierra Nevada Shaft	Past Producer	AU CU PB AG
Browne Adit	Past Producer	AG AU
Mexican Mine	Past Producer	AG AU CU PB ZN FE
Ophir Shaft	Past Producer	AU AG
California	Past Producer	AU AG

National Geochronological Database

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.

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Sample ID	Sample source	Rock name
3268	Outcrop or artificial surface exposure	Vein
16924	Float	Granite

National Geochemical Database: Sediment

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.

Database Home

Sample ID	Sample source	Sample notes
EQQ868	stream/river	stream
EQQ887	stream/river	stream
MAG016	natural exposure/outcrop

Global assessment of undiscovered copper resources

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

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Tract name	Deposit type	Geology
Cascade Arc	porphyry copper	U.S. part of a continental margin arc that formed during subduction of the Pacific and Juan de Fuca plates beneath western North America
Great Basin Tertiary	porphyry copper	Mid-Tertiary volcanic fields associated with postsubduction extension in the Great Basin
Sierran Arc	porphyry copper	A composite island-continental margin arc that formed during subduction of the Farallon Plate beneath western North America
Western U.S. and Sonoran Desert Jurassic Arc	porphyry copper	U.S. and Mexican parts of a composite island-continental margin arc that formed during subduction of the Farallon Plate beneath western North America

Prospect- and mine-related features on USGS topographic maps

Symbols indicating mining-related features digitized from historical USGS topographic maps in the western part of the conterminous US. Includes prospect pits, mine shafts and adits, quarries, open-pit mines, tailings piles and ponds, gravel and borrow pit

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Feature ID	Feature type	Feature name
Mine Shaft	point	Ophir Shaft
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point	Sierra Nevada Mine
Mine Shaft	point
Mine Shaft	point	Scorpion Shaft
Mine Shaft	point	Union Shaft
Mine Shaft	point
Mine Shaft	point	C & C Shaft
Prospect Pit	point
Open Pit Mine	point
Open Pit Mine	point	Cedar Hill Mine
Open Pit Mine	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Mine Shaft	point	Osbiston
Mine Shaft	point	Ophir
Mine Shaft	point	Con Virginia
Mine Shaft	point	Sierra Nevada
Mine Shaft	point	Scorpion
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point	Con Calif
Mine Shaft	point	Union Shaft
Open Pit Mine or Quarry	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Adit	point
Adit	point
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon
Mine Dump	polygon