Scientific data near [38.38805,-118.94307]

Search area extends approximately 2.2 km east-west and 2.8 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Mineral	county
Nevada	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Ninemile Ranch	quadrangle 1:24,000 scale
Excelsior Mountains	quadrangle 1:100,000 scale
Walker Lake	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
East Walker	hydrologic unit
Walker	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
Alluvium, undifferentiated	NV	Holocene and Pleistocene
Younger tuffaceous sedimentary rocks	NV	Pliocene and 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
Bodie-Aurora	M-D	Bodie-Aurora 20454 line km with spacing 0.15 km over parts of NV-CA
Western Nevada - Aurora	M-Dz	Western Nevada - Aurora 1738 line km with spacing 1.60 km over parts of NV
Walker Lake	M/R-D	Walker Lake 4858 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
GB28	Hot-spring Au-Ag	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
GB09	Porphyry Cu	Tertiary
GB10	Porphyry Cu	Jurassic
GB23	Epithermal vein, Comstock	Tertiary
GB26	Epithermal vein, quartz-alunite	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

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
5167375		Wet stream sediment sample dried at 110øC and sieved to -100 mesh (less than 150 microns).
5167378		Wet stream sediment sample dried at 110øC and sieved to -100 mesh (less than 150 microns).

Geochemistry of water samples in the US from the NURE-HSSR database

National-scale geochemical analysis of water samples in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
1095406		Stream water sample filtered through a 0.45 micron membrane filter and acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.
1095407		Stream water sample filtered through a 0.45 micron membrane filter and acidified to a pH of less than or equal to 1 with reagent-grade nitric acid.

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
Gravel Pit	point