Scientific data near [39.85000,-120.99000]

Search area extends approximately 4.5 km east-west and 5.8 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Plumas	county
California	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Onion Valley	quadrangle 1:24,000 scale
Portola	quadrangle 1:100,000 scale
Chico	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Middle Fork Feather	hydrologic unit
Lower Sacramento	hydrologic accounting unit
Sacramento	hydrologic subregion
California	hydrologic region
Areas administered by US Federal agencies
Plumas National Forest	National Forest
National Forest FS	Type of land area
FS	Federal land areas administered by FS

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
Paleozoic marine rocks, undivided, unit 6 (Northwestern Sierra Nevada)	CA	Permian(?) to Jurassic(?)
Paleozoic metavolcanic rocks, unit 3 (Northwestern Sierra Nevada)	CA	Permian to Jurassic
Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range)	CA	Tertiary (2-24 Ma)
Ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains)	CA	Late Proterozoic(?) to Early Jurassic

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
Sierra Nevada '80	M-D	Sierra Nevada '80 6035 line km with spacing 0.80 km over parts of CA
Chico	M/R-D	Chico 4869 line km with spacing 4.80 km over parts of CA-NV

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
PC03	Skarn Cu	Mesozoic
PC08	Porphyry Cu	Mesozoic
PC40	Low-sulfide Au-quartz vein	Mesozoic

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
Calaveras-Baker	Accretionary wedge	Western Cordillera

Podiform chromite deposits

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.

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Record	Type	Comment
White Pine
Spot Claim
Diamond Claim
White Fir Claim

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.

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Site name	Development	Commodities
White Pine Mine	Past Producer	CR
Maurezzio Group	Past Producer	CR
Diamond Claim, Benner and Burrington Group	Past Producer	CR
White Fir Claim, Benner and Barrington Group	Past Producer	CR
Oakie Claim, Benner-Barrington Group	Occurrence	CR
Benner-Barrington Group	Occurrence	CR
Fido Claim	Occurrence	CR
Horseshoe Nos. 1, 2 Claims	Occurrence	CR
Pine Flat Nos. 1-3 Claims	Past Producer	CR
Spot Claim	Producer	CR
White Pine Chrome Mine Area	Occurrence	NI
White Pine Mine	Past Producer	CR FE
Commander	Unknown	CR
Diamond	Occurrence	CR
Spot Claim	Past Producer	CR FE
Maurezzio Group	Unknown	CR
Cough Group Nos. 1-3	Unknown	CR
Horseshoe Claims	Occurrence	CR
Fido Claim	Occurrence	CR
Benner & Barrington Group	Occurrence	CR
Pine Flat Nos 1-3	Occurrence	CR
Eddelbuttel	Occurrence	CR
Golden Horseshoe Mining Co	Unknown	AU

An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (web-accessible database)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

Database Home

Deposit name	Deposit type	Location
Cough Group	Past Producer	California, United States
Pine Flat Nos. 1-3 Claims	Past Producer	California, United States
White Pine Mine	Past Producer	California, United States
Diamond Claim, Benner and Burrington Group	Past Producer	California, United States
White Fir Claim, Benner and Barrington Group	Past Producer	California, United States
Cattle Spring Claims Nos. 1, 2	Past Producer	California, United States
Maurezzio Group	Past Producer	California, United States
Spot Claim	Producer	California, United States
Commander	unclassified	California, United States
Maurezzio Group	unclassified	California, United States
White Pine Mine	Past Producer	California, United States
Cough Group Nos. 1-3	unclassified	California, United States
Eddelbuttel Occurrence	Occurrence	California, United States
Horseshoe Nos. 1, 2 Claims	Occurrence	California, United States
Fido Claim	Occurrence	California, United States
Benner-Barrington Group	Occurrence	California, United States
Oakie Claim, Benner-Barrington Group	Occurrence	California, United States
Cattle Springs Claim No 1 & 2	Occurrence	California, United States
Horseshoe Claims	Occurrence	California, United States
Fido Claim	Occurrence	California, United States
Benner & Barrington Group	Occurrence	California, United States
Pine Flat Nos 1-3	Occurrence	California, United States
Diamond	Occurrence	California, United States
Eddelbuttel	Occurrence	California, United States
White Pine Chrome Mine Area	Occurrence	California, United States
Spot Claim	Past Producer	California, United States

National Geochemical Database: Concentrate

Geochemistry of concentrates from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are from the continental US and Alaska.

Database Home

Sample ID	Sample source	Sample notes
LGI826	stream/river	C; xcoord = 671920; ycoord = 411110; stream
LGI843	stream/river	C; xcoord = 673550; ycoord = 441211; stream
LGI963	stream/river	C; xcoord = 672000; ycoord = 411200; stream
LGI964	stream/river	C; xcoord = 672000; ycoord = 411200; stream; visible Au in C3;
LGI965	stream/river	C; xcoord = 672000; ycoord = 411200; stream
LGJ091	stream/river	C; xcoord = 673700; ycoord = 412060; stream
LGJ114	stream/river	C; xcoord = 672080; ycoord = 411390; stream
LGJ115	stream/river	C; xcoord = 671670; ycoord = 411350; stream
LGJ116	stream/river	C; xcoord = 672740; ycoord = 411765; stream
LGJ117	stream/river	C; xcoord = 671900; ycoord = 411770; stream
LGJ118	stream/river	C; xcoord = 671940; ycoord = 411785; stream
LGJ212	stream/river	C; xcoord = 671970; ycoord = 411160; stream

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
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
Mine Shaft	point
Mine Shaft	point
Open Pit Mine	point	White Pine Chrome Mine
Prospect Pit	point
Prospect Pit	point
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point
Prospect Pit	point
Open Pit Mine	point	White Pine Chrome Mine
Prospect Pit	point
Adit	point
Adit	point
Adit	point
Adit	point