Scientific data near [34.00000,-114.89000]

Search area extends approximately 4.5 km east-west and 5.4 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Riverside	county
California	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Arica Mountains	quadrangle 1:24,000 scale
Parker	quadrangle 1:100,000 scale
Needles	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Southern Mojave	hydrologic unit
Southern Mojave	hydrologic accounting unit
Southern Mojave-Salton Sea	hydrologic subregion
California	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
Quaternary alluvium and marine deposits	CA	Pleistocene to Holocene
Quaternary sand deposits, unit 2 (inland)	CA	Quaternary

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
Needles '80	M-D	Needles '80 26256 line km with spacing 0.80 km over parts of CA-AZ
Salton Sea North '81	M-D	Salton Sea North '81 1673 line km with spacing 0.80 km over parts of CA
Southeastern California	M-Dz	Southeastern California 6681 line km with spacing 4.80 km over parts of CA-NV
Maria Mountains	M-Dz	Maria Mountains 2024 line km with spacing 0.40 km over parts of CA
Needles	M/R-D	Needles 5285 line km with spacing 4.80 km over parts of CA-AZ
Salton Sea	M/R-D	Salton Sea 5449 line km with spacing 4.80 km over parts of CA-AZ

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
SB06	Porphyry Cu	Mesozoic - 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
Mojave	Lateral-extensional orogen	Central and Southwest

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.

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Sample ID	Material	Source
D-509182	Sediment	Stream, Dry
D-509187	Sediment	Stream, Dry

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
5195433	1980-03-06	Stream sediment sample from dry stream, sieved to less than 149 microns (-100 mesh), and dried (if necessary) at less than or equal to 110øC.
5195451	1980-03-07	Stream sediment sample from dry stream, sieved to less than 149 microns (-100 mesh), and dried (if necessary) at less than or equal to 110øC.

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
Randolph and Hamilton	Occurrence	CU AU CR FE
Black Canyon	Unknown	MN

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.

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Deposit name	Deposit type	Location
Randolph and Hamilton	Occurrence	California, United States

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.

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Sample ID	Sample source	Sample notes
C165942	surface
D509182	surface	NURE sample, <100 mesh fraction
D509187	surface	NURE sample, <100 mesh fraction

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
Western Sierra Madre Occidental and Laramide Central	porphyry copper	Belt of Late Cretaceous to middle Eocene (Laramide) magmatic arc rocks in the Sierra Madre Occidental, eastern Mexican Basin and Range, and the Mesa Central of north-central Mexico and extensions north in to the U.S
Southern California Batholith	porphyry copper	Jurassic-Early Cretaceous island arc(s) of western Baja California, including the western part of the Cretaceous Peninsular Ranges batholith and associated volcanic rocks
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