Usgs gold maps california

Usgs gold maps california DEFAULT
Coal fields of the conterminous United States - National Coal Resource Assessment updated version

This map sheet with accompanying Geographic Information System (GIS) project is an update of the existing U.S. Geological Survey (USGS) Conterminous U.S. Coal Fields map compiled using data primarily from the USGS National Coal Resource Assessment (NCRA).

InfoFocus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, titanium, and tungsten

Geographic areas within the US where deposits of certain critical mineral resources might be found. With state agencies and other organizations, USGS intends to conduct studies that will help locate critical mineral resources within these areas.

InfoFocus areas for data acquisition for potential domestic sources of critical minerals—Rare earth elements

Explains background, data sources, and methodology used to identify focus areas for potential domestic sources of rare earth elements in non-fuel deposit types.

InfoGIS for focus areas of potential domestic resources of 11 critical minerals: aluminum, cobalt, graphite, lithium, niobium, platinum group elements, rare earth elements, tantalum, tin, titanium, and tungsten

Geographic areas identified to target acquisition of geologic mapping, geophysical data, geochemistry, or detailed topographic information to aid research, mineral exploration, and evaluation of critical mineral potential.

InfoGIS, supplemental data table, and references for focus areas of potential domestic resources of 13 critical minerals in the United States and Puerto Rico: antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadium, and zirconium

Broad areas within the United States to target acquisition of geologic mapping, geophysical data, geochemical analysis, or detailed topographic information to aid research, mineral exploration, and evaluation of critical mineral potential in these areas.

InfoOverview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

Describes the methods, procedures, and fundamental reference information that were used throughout the assessment.

InfoUSMIN Mineral Deposit Database

A developing national-scale geospatial database that will be an authoritative source of information on the most important mines, mineral deposits, and mineral districts of the United States.

InfoCobalt Deposits in the United States

Descriptions of more than 60 mineral regions, mines, and mineral deposits within the United States and its territories that are reported to contain enrichments of cobalt.

InfoData base for undiscovered deposits of base and precious metals

Probabilistic estimates of the amounts of undiscovered gold, silver, copper, lead, and zinc in conventional types of mineral deposits in the United States.

InfoHistorical files from Federal Government mineral exploration-assistance programs, to

Scanned correspondence documenting the work of these programs, typically including information about the geology and mineralization reported at locations for which development assistance was sought.

InfoMapping the mineral resource base for mineral carbon-dioxide sequestration in the conterminous United States

Map includes GIS data for magnesium-rich ultramafic rocks

InfoMineral 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.

InfoPodiform chromite deposits

Location and characteristics of 1, individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

InfoPodiform chromite deposits--database and grade and tonnage models

Location and characteristics of 1, individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

InfoPreliminary map of tin occurrence areas in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoUSGS National Map of Surficial Mineralogy

Maps of exposed surface mineral groups derived from automated spectral analysis of satellite and airborne imaging systems; these data suggest areas that may contain mineral deposits of various types.

InfoAsbestos mines, prospects, and occurrences in the US

Location and mineralogical characteristics of former mines, prospects, and occurrences of asbestos in the continental US. No asbestos producing mines are currently active. Data here are drawn from several previously published reports.

InfoGeologic map of the Bodie Hills, California and Nevada

Spatial geologic map with rock type, vents, arcs, landslides, etc. provided in an ESRI geodatabase and KMZ format for Google Earth viewing. Mapsheet with accompanying descriptive pamphlet is provided as a PDF. Petrographic rock summary is also included.

InfoGlobal assessment of undiscovered copper resources

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

InfoHydrothermal Alteration Maps of the Central and Southern Basin and Range Province of the United States Compiled From Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Data

Maps and data showing the geographic distribution of surficial minerals likely produced by hydrothermal alteration, which may indicate areas permissive of gold and copper mineral deposits.

InfoImpact of mine and natural sources of mercury on water, sediment, and biota in Harley Gulch adjacent to the Abbott-Turkey Run mine, Lake County, California

Detailed samples around these abandoned mines will help to determine how well site remediation efforts have worked to reduce the dangerous levels of mercury that come from both natural sources here as well as the abandoned mines.

InfoMap of thorium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoMaps of hydrothermal alteration in the Basin and Range province of the US

Maps and data showing the geographic distribution of surficial minerals likely produced by hydrothermal alteration, which may indicate areas permissive of gold and copper mineral deposits.

InfoMining claim activity on Federal lands in the contiguous US and Alaska

Number and type of mine claims located on Federal lands and registered with the Bureau of Land Management, by year from through

InfoPetrographic and geochemical data for Cenozoic volcanic rocks of the Bodie Hills, California and Nevada

The purpose of this report is to present available petrographic and geochemical data for unmineralized rock samples, principally volcanic rocks and to make those data available to ongoing petrogenetic investigations of these rocks.

InfoPreliminary map of aluminum provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of chromite provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of cobalt occurrences in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of columbium (niobium) and tantalum provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of copper provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of fluorine provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of gold provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of iron provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of lead provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of manganese provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of mercury provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of nickel provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of phosphorous provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of platinum and platinum-group metal provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of rare-earth provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of the uranium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of titanium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of tungsten provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of vanadium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of zinc provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoProspect- 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

InfoRare earth element occurrences in the United States

Detailed descriptions of more than mineral districts, mines, and mineral occurrences (deposits, prospects, and showings) within the United States that are reported to contain substantial enrichment of rare earth elements.

InfoReported historic asbestos mines, historic asbestos prospects, and other natural occurrences of asbestos in California

Currently () asbestos is not mined commercially in the US. This data set shows occurrences and historic mines, and includes information on talc deposits.

Info
Sours: https://mrdata.usgs.gov/catalog/combine.php?term=&with=1-fUS06
USGS National Map of Surficial Mineralogy

Maps of exposed surface mineral groups derived from automated spectral analysis of satellite and airborne imaging systems; these data suggest areas that may contain mineral deposits of various types.

InfoCoal fields of the conterminous United States - National Coal Resource Assessment updated version

This map sheet with accompanying Geographic Information System (GIS) project is an update of the existing U.S. Geological Survey (USGS) Conterminous U.S. Coal Fields map compiled using data primarily from the USGS National Coal Resource Assessment (NCRA).

InfoWeathering and transport of chromium and nickel from serpentinite in the Coast Range ophiolite to the Sacramento Valley, California, USA

Investigates Cr and Ni geochemistry providing insight into the mobility and bioaccessibility of these toxic trace elements throughout northern California and perhaps the origin of elevated dissolved Cr(VI) concentrations in the western Sacramento Valley

InfoAlteration, slope-classified alteration, and potential lahar inundation maps of volcanoes for the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Volcano Archive

Identifies hydrothermally altered volcanic edifices and vulnerable areas downstream by mapping alteration on volcanoes, highlighting lahar prone watersheds using Global Digital Elevation Model data, and modeling via a lahar flow-fill modeling program

InfoPetrographic and geochemical data for Cenozoic volcanic rocks of the Bodie Hills, California and Nevada

The purpose of this report is to present available petrographic and geochemical data for unmineralized rock samples, principally volcanic rocks and to make those data available to ongoing petrogenetic investigations of these rocks.

InfoGeochemical, modal, and geochronologic data for Ga A-type granitoid intrusions of the conterminous United States

This report presents and makes data available to ongoing petrogenetic investigations of these rocks. It develops an accurate and current portrayal of their spatial distribution in GIS format while analyzed samples are presented via Excel workbooks.

InfoGeochemical and mineralogical data for soils of the conterminous United States

Systematic geochemical and mineralogical survey of soil horizons analyzed using a consistent set of methods, sample spacing 1 per 1, sq km.

InfoGeochemical and mineralogical data for soils of the conterminous United States

Systematic geochemical and mineralogical survey of soil horizons analyzed using a consistent set of methods, sample spacing 1 per 1, sq km.

InfoGeochronology of Cenozoic rocks in the Bodie Hills, California and Nevada

Presents data for mineral deposits and unaltered and hydrothermally altered volcanic rocks. Data presented were acquired in three USGS labs by three different geochronologists. Analytical methods and data derived from each lab are presented separately.

InfoGeologic map of the Bodie Hills, California and Nevada

Spatial geologic map with rock type, vents, arcs, landslides, etc. provided in an ESRI geodatabase and KMZ format for Google Earth viewing. Mapsheet with accompanying descriptive pamphlet is provided as a PDF. Petrographic rock summary is also included.

InfoAirborne electromagnetic data and processing within Leach Lake Basin, Fort Irwin, California

Releases airborne survey data, resistivity cross-sections and depth slices derived from data inversion. Resulting resistivity models confirm geologic framework, constrain hydrostratigraphy and depth to basement, and reveal fault and fold distribution.

InfoGravity survey and interpretation of Fort Irwin and vicinity, Mojave Desert, California

Provides a view of alluvial basins, shapes, areal extents, and approximate thicknesses of alluvial fill. Gravity field is separated into density variations in the basement complex and distribution of Cenozoic fill with its 3-D thickness representation.

InfoAeromagnetic data, processing, and maps of Fort Irwin and vicinity, California

Aeromagnetic data help provide the underpinnings of a hydrogeologic framework for Fort Irwin by locating inferred structural features or grain that influence groundwater flow. Magnetization boundaries defined by horizontal-gradient analyses coincide lo

InfoTime-domain electromagnetic surveys at Fort Irwin, San Bernardino County, California,

Describes electromagnetic sounding locations, data acquisition, calibration, and modeling; compares data to borehole data, correlating model results; and summarizes the applications and limitations of the TEM method. Examples of models are provided.

InfoDigital tabulation of stratigraphic data from oil and gas wells in the Santa Maria Basin and surrounding areas, central California coast

This report makes available a large well dataset so that subsurface stratigraphic data are available in digital form for use within a GIS and in construction of three-dimensional models to address regional stratigraphic and structural questions.

InfoPreliminary Aeromagnetic Map of Joshua Tree National Park and Vicinity, Southern California

This map is intended to promote further understanding of the geology and structure in the region by serving as a basis for geophysical interpretations and by supporting geological mapping, water-resource investigations, and various topical studies.

InfoMineral and Vegetation Maps of the Bodie Hills, Sweetwater Mountains, and Wassuk Range, California/Nevada, Generated from ASTER Satellite Data

Analyzed remote sensing data identify and map minerals, vegetation groups, and volatiles. Four maps show: 1) mineral groups, 2) iron bearing minerals, vegetation, water, 3) clay, sulfate, mica, carbonate, Mg-OH, hydrous quartz and 4) quartz abundance.

InfoGeochemical and mineralogical maps for soils of the conterminous United States

Geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS

InfoMagnetic and gravity studies of Mono Lake, east-central, California

Magnetic and gravity investigations were undertaken in Mono Lake to study regional crustal structures and to aid in understanding the geologic framework, in particular regarding potential geothermal resources and volcanic hazards throughout Mono Basin.

InfoMagnetic susceptibility data for some exposed bedrock in the western conterminous United States

In-place rock magnetic susceptibility measurements for sites are reported in a database. These data, collected from through , are intended to help improve geophysical modeling of the Earth’s crust in the Western United States.

InfoPrincipal facts and an approach to collecting gravity data using near-real-time observations in the vicinity of Barstow, California

The purpose of the data collection was to investigate possible changes in gravity across mapped Quaternary faults and to improve regional gravity coverage, adding to the existing national gravity database.

InfoGeochemical and mineral maps from soils of the conterminous United States: interactive web site

Interactive web site showing geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS

InfoBasement domain map of the conterminous United States and Alaska

Seventy-seven major components of the North American continent were delineated at a general scale (,,); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

InfoBasement domain map of the conterminous US and Alaska

Seventy-seven major components of the North American continent were delineated at a general scale (,,); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

InfoAirborne geophysical surveys

Airborne surveys measuring the earth's magnetic field, resistivity or other electomagnetic properties, or gamma ray emission over parts of North America.

InfoState geologic map compilation

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

InfoMining claim activity on Federal lands in the contiguous US and Alaska

Number and type of mine claims located on Federal lands and registered with the Bureau of Land Management, by year from through

InfoPreliminary integrated geologic map databases for the United States: California, Nevada, Arizona, Washington, Oregon, Idaho, and Utah

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

InfoPreliminary aeromagnetic anomaly map of California

Map showing magnetic anomaly of California composed by merging and editing data from distinct surveys conducted previously.

InfoHistory and evaluation of national-scale geochemical data sets for the United States

Overview explaining how and why six different geochemical data sets were produced, and why you might choose to use the data in any one of these instead of the others.

InfoGeophysical terranes of the Great Basin and parts of surrounding provinces

A set of geophysical maps with anomalies that are labeled and keyed to tables containing information on each anomaly and its source.

InfoGeochemistry of sediments in the US from the PLUTO database

Geochemical data for unconsolidated sediments (stream sediments, lake sediments, etc.) collected in the US and analyzed by the USGS. These data were originally entered in the PLUTO database, which is now merged into the National Geochemistry Database.

InfoData base for undiscovered deposits of base and precious metals

Probabilistic estimates of the amounts of undiscovered gold, silver, copper, lead, and zinc in conventional types of mineral deposits in the United States.

InfoDigital Aeromagnetic Datasets for the Conterminous United States and Hawaii - A Companion to the North American Magnetic Anomaly Map

Digital and analog archives comprising more than 1, surveys, covering approximately 8,, line-km of data, flown at various flight heights and line spacings

InfoPan-American Center for Earth and Environmental Studies (PACES) gravity data portal

Terrain-corrected US gravity station data using NAD83 and NGVD88 downloadable from a map interface.

InfoDigitized Aeromagnetic Datasets for the Conterminous United States, Hawaii, and Puerto Rico

Aeromagnetic anomaly values digitized from older surveys

InfoChemical analyses of soils and other surficial materials of the conterminous US

Geochemistry of soils and other regoliths collected and analyzed by Hans Shacklette and colleagues from until about

InfoPrecambrian basement structure map of the continental United States-an interpretation of geologic and aeromagnetic data

Principal basement structures formed during the Precambrian in the continental United States based on interpretation of regional aeromagnetic anomaly data of North America.

InfoGeological map data

Characteristics of bedrock and surficial geologic terranes and structural features at various levels of detail. The information provided here are intended for use in the synoptic study of large areas, and are likely not suitable for detailed study of geog

InfoCalifornia geologic map data

A GIS database of geologic units and structural features in California, with lithology, age, data structure, and format written and arranged just like the other states.

InfoMapping the mineral resource base for mineral carbon-dioxide sequestration in the conterminous United States

Map includes GIS data for magnesium-rich ultramafic rocks

InfoGeochemical database for igneous rocks of the ancestral Cascades Arc--southern segment, California and Nevada

Compilation of all available chemical data (more than 2, samples) for igneous rocks that constitute the southern segment of the ancestral Cascades magmatic arc.

InfoDigital map of major bedrock lithologic units for the Pacific Northwest: a contribution to the Interior Columbia Basin Ecosystem Management ProjectInfoA preliminary full spectrum magnetic anomaly grid of the United States with improved long wavelengths for studying continental dynamics

The long-wavelength (, km) content of the regional magnetic anomaly compilation was improved by utilizing a nearly homogeneous a nearly homogeneous set of NURE magnetic surveys flown from to

InfoGeochemistry 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.

InfoGeochemistry 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.

InfoAsbestos mines, prospects, and occurrences in the US

Location and mineralogical characteristics of former mines, prospects, and occurrences of asbestos in the continental US. No asbestos producing mines are currently active. Data here are drawn from several previously published reports.

InfoReported historic asbestos mines, historic asbestos prospects, and other natural occurrences of asbestos in California

Currently () asbestos is not mined commercially in the US. This data set shows occurrences and historic mines, and includes information on talc deposits.

InfoPb-concentrations and Pb-isotope ratios in soils collected along an east-west transect across the United States

Analytical results for Pb-concentrations and isotopic ratios from about samples of soil A horizon and about samples of soil C horizon collected along a km east-west transect across the USA.

InfoNational 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 correcting locations and providing the data in more convenient formats.

InfoNational 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 correcting locations and providing the data in more convenient formats.

InfoGeochemistry of soils in the US from the PLUTO database

Geochemical data for soils collected in the United States and analyzed by the USGS. The data were originally entered into the in-house PLUTO database. This is a subset of DDS

InfoActive mines and mineral plants in the US

Mine plants and operations for commodities monitored by the National Minerals Information Center of the USGS. Operations included are those considered active in and surveyed by the USGS.

InfoNational 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"

InfoMineral 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.

InfoNational 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 square km.

InfoPodiform chromite deposits--database and grade and tonnage models

Location and characteristics of 1, individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

InfoPodiform chromite deposits

Location and characteristics of 1, individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

InfoNational 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.

InfoGravity and magnetic studies of the eastern Mojave Desert, California and Nevada

Report with generalized interpretation and Excel tables of gravity and physical property data including an explanations of their formats.

InfoHistorical files from Federal Government mineral exploration-assistance programs, to

Scanned correspondence documenting the work of these programs, typically including information about the geology and mineralization reported at locations for which development assistance was sought.

InfoNational Geochemical Database: Soil

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

InfoNational Geochemical Database: Concentrate

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

InfoGlobal assessment of undiscovered copper resources

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

InfoProspect- 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

InfoPreliminary map of phosphorous provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of platinum and platinum-group metal provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of tungsten provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of copper provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of nickel provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of mercury provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of fluorine provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of iron provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of vanadium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of cobalt occurrences in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of titanium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of tin occurrence areas in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of aluminum provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of columbium (niobium) and tantalum provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of manganese provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of lead provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of zinc provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of chromite provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of gold provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of rare-earth provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoMap of thorium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoPreliminary map of the uranium provinces in the conterminous United States

Scanned image of map drawn at ,, scale, projection probably Lambert Conformal Conic, monochrome.

InfoGravity anomaly grids for the conterminous US

Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. Includes the isostatic and Bouguer anomalies for the conterminous US.

InfoThe State Geologic Map Compilation (SGMC) Geodatabase of the Conterminous United States

A collection of state geological maps using the same underlying database structure. Updates the preliminary state geologic map compilation released in , with corrections and seven updated state geologic maps as well as seven new state geologic maps.

InfoGIS for focus areas of potential domestic resources of 11 critical minerals: aluminum, cobalt, graphite, lithium, niobium, platinum group elements, rare earth elements, tantalum, tin, titanium, and tungsten

Geographic areas identified to target acquisition of geologic mapping, geophysical data, geochemistry, or detailed topographic information to aid research, mineral exploration, and evaluation of critical mineral potential.

InfoCobalt Deposits in the United States

Descriptions of more than 60 mineral regions, mines, and mineral deposits within the United States and its territories that are reported to contain enrichments of cobalt.

InfoReanalysis of Selected Archived NURE-HSSR Sediment and Soil Samples from Arizona, California, Idaho, Montana, Nevada, New Mexico, and Utah (ver. , October )

Reanalysis, using modern methods, of nearly 60, NURE-HSSR archived samples collected over parts of Arizona, California, Idaho, Montana, Nevada, New Mexico, and Utah.

InfoDigital maps of hydrothermal alteration type, key mineral groups, and green vegetation of the western United States derived from automated analysis of ASTER satellite data

Mineral groups identified through automated analysis of remote sensing data acquired by the ASTER system were used to map the type and spatial distribution of hydrothermal alteration, other exposed mineral groups, and green vegetation.

InfoLarge-area material maps of the conterminous United States

Maps of exposed surface mineral groups derived from automated spectral analysis of Landsat 7 ETM+ and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data.

InfoFocus areas for data acquisition for potential domestic sources of critical minerals—Rare earth elements

Explains background, data sources, and methodology used to identify focus areas for potential domestic sources of rare earth elements in non-fuel deposit types.

InfoAirborne radiometric maps of Mountain Pass, California

Geophysical investigations of Mountain Pass and vicinity were begun as part of an effort to study regional crustal structures as an aid to understanding the geologic framework and mineral resources of the eastern Mojave Desert. The study area encompasses

InfoGeochemical and mineralogical maps, with interpretation, for soils of the conterminous United States

Between and , the U.S. Geological Survey conducted a low-density (1 site per 1, square kilometers, 4, sites) geochemical and mineralogical survey of soils in the conterminous United States. The sampling protocol for the national-scale surve

InfoIsostatic gravity map of Mountain Pass and vicinity, California and Nevada

Gravity investigations of Mountain Pass and vicinity were begun as part of an effort to study regional crustal structures as an aid to understanding the geologic framework and mineral resources of the eastern Mojave Desert. The study area, which straddles

InfoGeophysical and geologic maps of Mountain Pass and vicinity, California and Nevada

U.S. Geological Survey Scientific Investigations Map is a series of products that consists of geophysical and geologic maps of Mountain Pass and vicinity, California. Maps A and B (red outline in above map image) are gravity and aeromagnetic maps, re

InfoUSMIN Mineral Deposit Database

A developing national-scale geospatial database that will be an authoritative source of information on the most important mines, mineral deposits, and mineral districts of the United States.

InfoFocus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, titanium, and tungsten

Geographic areas within the US where deposits of certain critical mineral resources might be found. With state agencies and other organizations, USGS intends to conduct studies that will help locate critical mineral resources within these areas.

InfoGIS, supplemental data table, and references for focus areas of potential domestic resources of 13 critical minerals in the United States and Puerto Rico: antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadium, and zirconium

Broad areas within the United States to target acquisition of geologic mapping, geophysical data, geochemical analysis, or detailed topographic information to aid research, mineral exploration, and evaluation of critical mineral potential in these areas.

InfoHydrothermal Alteration Maps of the Central and Southern Basin and Range Province of the United States Compiled From Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Data

Maps and data showing the geographic distribution of surficial minerals likely produced by hydrothermal alteration, which may indicate areas permissive of gold and copper mineral deposits.

InfoMaps of hydrothermal alteration in the Basin and Range province of the US

Maps and data showing the geographic distribution of surficial minerals likely produced by hydrothermal alteration, which may indicate areas permissive of gold and copper mineral deposits.

InfoMajor- and trace-element concentrations in soils from northern California: Results from the Geochemical Landscapes project pilot study

Regional-scale geochemical survey designed to serve as a baseline for further analyses, and to understand effects of historical mining in the area.

InfoA compilation of K-Ar-ages for southern California

Conventional K-Ar ages for granitic, volcanic, and metamorphic rocks collected in this area.

InfoAnalytical Results and Sample Locality Map for Rock, Stream-Sediment, and Soil Samples, Northern and Eastern Colorado Desert BLM Resource Area, Imperial, Riverside, and San Bernardino Counties, California

A geochemical survey of the Bureau of Land Management's million-acre Northern and Eastern Colorado Desert Resource Area

InfoIsostatic gravity map of the Las Vegas 30'x60' quadrangle, California and Nevada

Includes principal facts (gravity observations) for 2, stations.

InfoGeologic and geophysical maps of the Death Valley ground-water model area, Nevada and California

Maps and geospatial data for (a) geology; (b) tectonics; (c) isostatic gravity anomaly; (d) aeromagnetic anomaly; (e) depth to pre-Cenozoic basement.

InfoGravity and ground magnetic data from selected traverses in the Amargosa desert and vicinity, Nevada and California

Maps of aeromagnetic data and a table of gravity station data now available for download

InfoGround-magnetic studies of the Amargosa desert region, California and Nevada

Hand-held magnetometer and sample magnetic susceptibility measurements used to help interpret complex patterns in the magnetic anomaly of this area.

InfoAeromagnetic expression of buried basaltic volcanoes near Yucca Mountain, Nevada

Mathematical modeling and analysis of aeromagnetic anomaly data (gridded data provide in another report).

InfoSix aeromagnetic surveys in Nevada and California

Gridded data for aeromagnetic surveys with contractors' reports describing the data collection

InfoDigital geologic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California, revision 4

GIS data for geologic units and structural features, with aeromagnetic and gravity maps in PDF

InfoAeromagnetic survey of the Amargosa desert, Nevada and California

Grid data files along with maps in PDF and PostScript accompany this report

InfoSummary of geophysical investigations of the Death Valley regional water-flow modeling project, Nevada and California

Magnetic and gravity anomaly and structure contour data

InfoReview of samples of tailings, soils and stream sediment adjacent to and downstream from the Ruth Mine, Inyo County, California

Detailed study of mine waste material and sediments from streams passing through it. Arsenic is the main contaminant of interest here.

InfoPhysical, chemical, and mineralogical data from surficial deposits, groundwater levels, and water composition in the area of Franklin Lake playa and Ash Meadows, California and Nevada

Presents data and describes the methods used to determine the physical attributes, as well as the chemical and mineralogical composition of surficial deposits; groundwater levels; and water composition in this area.

InfoAeromagnetic survey map of the central California coast ranges

Intended to promote further understanding of the geology and structure in the central California Coast Ranges, includes downloadable gridded point database.

InfoReview of samples of sediment, tailings, and waters adjacent to the Cactus Queen gold mine, Kern County, California

Mine tailings here have high levels of arsenic. Experiments conducted on these sediments indicate that the arsenic can be released into the environment and become hazardous through chemical processes that occur when fine sediment is ingested by animals.

InfoPreliminary isostatic residual gravity anomaly map of Paso Robles 30 x 60 minute quadrangle, California

Includes 2, ( not previously published) gravity station measurements with calculations of free-air, simple Bouguer, complete Bouguer, and isostatic anomaly.

InfoPrincipal facts for gravity stations in the Dry Valley area, West-Central Nevada and east-central California

Gravity measurements used for determining geologic structure to aid in understanding ground-water flow

InfoGravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California

Report with gravity station data in a spreadsheet

InfoMultielement geochemical dataset of surficial materials for the northern Great Basin

Geochemical data generated during mineral and environmental assessments for the Bureau of Land Management in northern Nevada, northeastern California, southeastern Oregon, and southwestern Idaho.

InfoGeophysical studies in the vicinity of the Warner Mountains and Surprise Valley, northeast California, northwest Nevada, and southern Oregon

Gravity station data and physical property measurements used to infer subsurface geologic structure

InfoOverview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

Describes the methods, procedures, and fundamental reference information that were used throughout the assessment.

InfoGround magnetic data from within the Long Valley Caldera, California

Results of a detailed ground magnetic survey

InfoTemporal Chemical Data for Sediment, Water, and Biological Samples from the Lava Cap Mine Superfund Site, Nevada County, California

This report is a compilation of water and sediment chemical data generated by the USGS study of indigenous, arsenic-sequestering microbial communities. A total of 9 synoptic sampling efforts conducted at specific sites are described.

InfoPreliminary isostatic gravity map of Joshua Tree National Park and vicinity, southern California

Map with excel tables showing principal facts (gravity observation data).

InfoSix aeromagnetic surveys in California, Nevada, and Arizona

Grid and flight-line data files provided to USGS by contract geophysical surveyors

InfoIsostatic gravity map with geology of the Santa Ana 30'x60' quadrangle, southern California

Contour map of isostatic gravity anomaly with bedrock geology, and principal facts for the gravity stations as a separate data file.

InfoHigh-resolution gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California

These data were acquired to determine the thickness of valley-fill deposits and to delineate geologic structures that might influence groundwater flow beneath this area.

InfoRare earth element occurrences in the United States

Detailed descriptions of more than mineral districts, mines, and mineral occurrences (deposits, prospects, and showings) within the United States that are reported to contain substantial enrichment of rare earth elements.

InfoPrincipal facts for gravity stations in the vicinity of San Bernardino, southern California

Gravity measurements collected to help define the characteristics of the Rialto-Colton fault, with rock properties such as lithology, magnetic susceptibility and density.

InfoGravity map and data of the eastern half of the Big Bear Lake, , scale quadrangle, California, and analysis of the depths of several basins

Data on the southern portion of the Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms and the Yucca Valley-Joshua Tree-Twentynine Palms area and presents the map and basin analyses.

InfoGravity and magnetic investigations of the Mojave National Preserve and adjacent areas, California and Nevada

Gravity station and rock physical property data used to infer geologic structure of the area

InfoGeochemical data generated by projects funded by the USGS Earth Mapping Resources Initiative

Includes all geochemical data generated by each project partnership funded through Earth MRI and will be updated periodically as additional geochemical data from these projects becomes available.

InfoAirborne magnetic and radiometric survey of the southeast Mojave Desert, California and Nevada

Digital flight-line aeromagnetic and aeroradiometric survey data over of the southeast Mojave Desert, parts of California and Nevada. Data files are provided in CSV as well as Geosoft binary database and grid exchange format (GXF).

InfoCharacterization of major lithologic units underlying the lower American River using water-borne continuous resistivity profiling, Sacramento, California, June

Geophysical study of the sediment under a river intended to help assess the susceptibility of this material to scour and the erosion of levees adjacent to the river.

InfoPreliminary gravity and magnetic data of the Lake Pillsbury northern Coast Ranges, California

Report with excel tables showing principal facts (gravity observation data) and ground magnetic data.

InfoEnvironmental impact of the Helen, Research, and Chicago mercury mines on water, sediment, and biota in the Upper Dry Creek watershed, Lake County, California

Data from field sampling of tailings, waste rock, sediment, and water at the mines, along with water, sediment, and biota in a pond and tributaries that drain from the mine area, to help assess the chemical hazards due to historic mining.

InfoGeologic map of the Bartlett Springs Fault Zone in the vicinity of Lake Pillsbury and adjacent areas of Mendocino, Lake, and Glenn Counties, California

Map and study intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide hazards, mineral potential, seismic velocity, and earthquake faults.

InfoImpact of mine and natural sources of mercury on water, sediment, and biota in Harley Gulch adjacent to the Abbott-Turkey Run mine, Lake County, California

Detailed samples around these abandoned mines will help to determine how well site remediation efforts have worked to reduce the dangerous levels of mercury that come from both natural sources here as well as the abandoned mines.

InfoSeven aeromagnetic surveys in California and Nevada

Grid and flight-line data files provided by the geophysical survey contractors.

InfoPrincipal facts for gravity data along the Hayward fault and vicinity, San Francisco Bay area, northern California

Data and associated physical property measurements were collected as part of on-going studies to help determine the earthquake hazard potential of major faults within the San Francisco Bay region

InfoPreliminary isostatic gravity map of the Sonoma Volcanic field and vicinity, Sonoma and Napa counties, California

Gravity station data from three separate surveys

InfoMercury release from the Rathburn Mine, Petray Mine, and Bear Valley saline springs, Colusa County, California

Summary of data obtained from field sampling of mine tailings and waste rock and water and sediment in regional springs and tributaries that drain from the mine area into Bear Creek. Ground-water springs are also potential sources of mercury here.

InfoGeologic and geophysical maps of the eastern three-fourths of the Cambria 30 x 60 degree quadrangle, central California Coast Ranges

Contains geologic, gravity anomaly, and aeromagnetic anomaly maps and the associated geologic and geophysical databases (ArcMap), as well as complete descriptions of the geologic map units and the structural relations in the mapped area.

InfoIsostatic gravity map of the Monterey 30x60 minute quadrangle and adjacent areas, California

Gravity measurements to support regional mapping and hydrologic studies

InfoIsostatic gravity map of the Point Sur 30 x 60 quadrangle and adjacent areas, California

Includes gravity station measurements with isostatic, free-air, simple and complete Bouguer anomalies, and terrain correction.

InfoReview of samples of water, sediment, tailings, and biota at the Little Bonanza mercury mine, San Luis Obispo County, California

Data from field sampling of mine tailings, wasterock, sediment, water, and biota at the mine in Results permit a preliminary assessment of the mining sources of Hg and associated chemicals that could produce elevated levels of monomethylmercury.

InfoMagnetic map of the Irish Hills and surrounding areas, San Luis Obispo County, central California

Database includes new helicopter aeromagnetic data, point locations of the local maximum horizontal gradient derived from the aeromagnetic data, and physical property data.

InfoIsostatic gravity map with simplified geology of the Los Angeles 30x60 minute Quadrangle

Includes detailed point measurements of gravity

InfoPreliminary potential-field constraints on the geometry of the San Fernando basin, southern California

Results of mathematical modeling of gravity and magnetic anomaly data to infer the geologic structure of the area

InfoGravity data along LARSE (Los Angeles Regional Seismic Experiment) line 2, southern California

Data taken across the San Fernando Basin and Transverse Ranges to help characterize the structure underlying this area

InfoAeromagnetic and aeromagnetic-based geologic maps of the Coastal Belt, Franciscan Complex, northern California

New aeromagnetic point observation data with grids as well

InfoGeologic and geophysical framework of the Santa Rosa ' quadrangle, Sonoma county, California

Geologic units, structural features, magnetic and gravity anomaly contours and radiometric ages of this area

InfoEnvironmental impact of the Contact and Sonoma mercury mines on water, sediment, and biota in Anna Belcher and Little Sulphur Creek watersheds, Sonoma County, California

Data from field sampling of tailings, waste rock, sediment, and water at the mines, along with water, sediment, and biota in a pond and tributaries that drain from the mine area, to help assess the chemical hazards due to historic mining.

InfoMercury geochemistry of gold placer tailings, sediments, bedrock, and waters in the lower Clear Creek area, Shasta County, California; report of investigations,

Total mercury and methylmercury measured in sediments, tailings, and water in an area where historical gold mining has occurred; proposed habitat restoration work may release some of the mercury that is currently buried there.

Info
Sours: https://mrdata.usgs.gov/catalog/science.php?thcode=1&term=fUS06
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More than a third of the gold produced by the United States was mined in California. The bulk of this gold was recovered from the western slope of the northern half of the Sierra Nevada between the Merced River in the south and the Feather River to the north, a distance of about mi. Gold was first discovered, in this region, on the American River at Coloma in , triggering the famed California gold rush. Mining was continuously active, somewhere in the area, from the discovery of gold until World War II when mining was legally prohibited. Dramatic increases in gold prices in the past decade coupled with recent advances in extractive techniques have revitalized prospecting, and major deposits are currently being explored and developed.

Gold has been found in a variety of geologic environments in the region. In addition to production from the complex vein systems of the historically famous Mother Lode and associated East Gold Belt and West Gold Belt, large amounts of gold have also been recovered from the Grass Valley-Nevada City and other isolated lode districts and from Tertiary river channels and Quaternary alluvium.

This oblique map illustrates the relation of the different gold-bearing environments to each other and to the general terrain of the northern Sierra Nevada. The map was derived from the U.S. Geological Survey ,scale topographic map of California and the U.S. Geological Survey ,scale topographic map of Nevada, using an isometrograph, a mechanical instrument that produces an oblique framework by tracing individual contours. Form lines sketched over this framework graphically portray the physiographic configuration of the region. Relief on the oblique map has a vertical exaggeration and appears as if viewed from a 30° angle above the horizon.

Locations of lode gold prospects and mines shown on the map were obtained from the U.S. Geological Survey's Mineral Resource Data System (MRDS), a computerized mineral-resource information file, and plotted in their respective locations (D.F. Huber, written commun., ). Some locations from two northern counties, missing from the MRDS retrival, were added. The twenty lode mines believed to be the most productive are cited in table 1. A total of nearly 4, sites, including both prospects and mines, were initially plotted, but about a third of those were obscured by topography on the oblique map. Locations of Tertiary river channels and gold-dredging fields were taken from published general references modified by examining specific sources and by cursory field examination. Seven of the major dredge fields are identified in table 2.

Sours: https://pubs.er.usgs.gov/publication/mf

Where to Find Gold in California

With over 22, historical mine locations in the USGS MRDS database of mines, California has more gold mines that the next top four gold states combined. California was also the largest gold producing state up to with over million ounces produced.

In recent decades other states have overtaken California in total gold production, mostly as a product of open-pit mines or byproduct of copper mining. However, California remains the premier state for the independent miner looking to find gold by placer mining methods or by metal detecting.

California gold regions

WMH Gold Maps for Google Earth Pro are designed to locate areas with high potential for finding placer gold. The California Gold Map will be used in this article to analyze regions of high gold potential by looking at PLSS townships that contain both historical gold mines and active placer mining claims, indicators that gold is being actively mined in these areas in modern times.

Townships that contain both active placer claims and historical gold mine records are shaded in one of the following colors based on how many active placer claims are in the township: 1 – 10 claims: blue; 10 – 50 claims: yellow; 50 – claims: orange; More than claims: red

Additional images in this article will contain more data points. Yellow circles are gold mines, hexagonal markers are PLSS sections that contain active placer mining claims, and blue markers with pick axes are district locations.

Township PLSS numbers cited in this article are in the same format used in the BLM MLRS application, and can be copied and pasted directly into the MLRS search form.

Related:Researching Mining Claims with the BLM MLRS

California can be divided into three primary regions for gold analysis &#; Northern (Klamath Mountains), Central (Sierra Nevada), and Southern.

This article will explore California gold regions from a broad perspective. Subsequent articles will look more closely at the state&#;s gold regions individually.

Sierra Nevada Region

California&#;s Sierra Nevada Mountain Range is by far the top gold region in the state. With well over 10, gold mines and thousands of active placer claims, this region has the state&#;s largest historical gold production totals and the most active modern placer mining districts.

This gold belt trends north to south for over a hundred miles with the greatest concentration of gold mines in Sierra, Nevada, and Placer, and Plumas counties. These counties rank 1st, 2nd, 4th and 6th in our Top Ten Gold Counties in the United States list.

Sierra Nevada Gold Region

1. Downieville and Alleghany Districts (Sierra County)

Downieville was one of the first areas mined during the California Gold Rush. It is also one of the richest placer mining districts in the state. Today the Downieville district is still one of the most active placer mining areas in California.

Gold mining around Downieville, California

Downieville is in PLSS township 21 N E which ranks third in the state for placer claim density. Four neighboring townships are also in the top ten.

The Alleghany district could be the center of gold activity in the entire state. Township 21 N E has the highest placer claim density in California with claims. Just to the north, township 21 N E is second in the state with placer claims and an incredible historical gold mine records.

Gold mines and placer claims in the Alleghany district

2. La Porte &#; Poker Flat &#; Rich Bar (Plumas and Sierra Counties)

Placer mining first occurred in this area in the s with hydraulic mining starting in the s. The gold output from these districts was enormous during the first few decades, with over $60 million credited to the La Porte district, over $14 million from the Poker Flat district, and over $9 million from the Rich Bar district.

La Porte - Gibsonville - Rich Bar gold areas

Today this area has many of the top gold producing townships in the state. Township 21 N E ranks 5th for placer claim density with claims, 21 N E 7th with claims, and 21 N E 8th with claims.

3. North Bloomfield &#; Washington &#; Lowell Hill (Nevada County)

The North Bloomfield and Washington districts contained some of the largest hydraulic gold mines in California during the period from the mid s to the early s. The famous Malakoff mine was once the largest hydraulic mining operation in the world.

The mines in these districts produced tens of millions of dollars in gold before Much gold remains however as illustrated by the high density of placer mining claims throughout the area.

North Bloomfield - Washington - Lowell Hill gold mining areas

The Lowell Hill district may have been less notable than the other districts mentioned in this section, but today it is the center of a very active placer mining area. Township 21 N E ranks 4th in the state for placer claim density with claims and 21 N E ranks 6th with claims.

4. Foresthill &#; Michigan Bluff &#; Duncan Peak (Placer County)

Similar to the districts previously mentioned in this article, the Foresthill, Michigan Bluff, and Duncan Peak districts were originally worked in the s and transitioned to hydraulic mining by the s. The Foresthill district was particularly rich, producing over $25 million in gold.

Foresthill - Michigan Bluff - Duncan Peak god districts

The block of eight townships shown in the image above are all among California&#;s top gold producing areas. Townships 21 N E and 21 N E have particularly high densities of placer mining claims allowing them to rank 14th and 16th in the state.

5. Butt Valley and Quincy Districts (Plumas County)

The Butt Valley district (not a typo) is located on the North Fork of the Feather River in Plumas County. The district location is described as &#;an extensive area that lies between Lake Almanor on the north and the Virgilia-Twain area on the south and southwest.&#;

Butt Valley and Quincy gold districts - Plumas County California

The Feather River and its tributaries were mined for &#;vast amounts of placer gold&#; during the Gold Rush years starting in the s.

The center of the Butt Valley district is the once prosperous gold mining town of Seneca in township 21 N E (69 placer claims, 18th place). Seneca is now a ghost town but this area remains an active placer mining center.

The Quincy district is centered on the town of Quincy, county seat of Plumas County. Township 21 N E ranks 27th with 48 placer claims.

The image above illustrates that many of the townships around the Quincy and Butt Valley districts are areas of high placer claim density.

Klamath Mountains Region

The Klamath Mountains in northwestern California is the second most important gold region in California. The principal gold districts are in Shasta, Siskiyou, and Trinity Counties.

Siskiyou County ranks 9th our Top Ten Gold Counties in the United States list.

Klamath Mountains Gold Region of Northern California

1. Klamath River Districts

The top spot was difficult to choose as the number one gold township in the Klamath Mountains is in the Salmon River area. However, the gold districts along the Klamath River form a placer mining area that stretches along Highway 96 from Interstate Five to the town of Orleans, a distance of approximately miles. This area is one of California&#;s most extensive gold regions.

Top gold townships in the Klamath River region of Northern California

This region was originally mined in the s, and continues to be an active placer mining area. Thirteen of the state&#;s top gold townships are located on the Klamath River, with additional townships on gold-bearing tributaries.

Township 21 N W is the location of the Humbug District on Humbug Creek, a tributary of the Klamath River. This was an extremely rich placer mining area in the mid s and is credited with over $15 million in gold production. Today the township ranks second for placer claim density in the Klamath Mountains region with 53 claims.

2. Salmon River Districts

The Salmon River is located in some of California&#;s wildest mountains, and continues to be an active placer mining area. The publication Gold Districts of California gives a good synopsis of the Salmon River districts:

This river is not as long as the Klamath or Trinity Rivers, but it flows through several rich and famous placer-mining districts. The most productive districts have been at Snowden and Sawyer&#;s Bar on the North Fork, Cecilville and Knownothing on the South Fork, and Forks of Salmon at the junction of the North and South Forks.

Probably the richest portion of the river was the mile stretch of the North Fork between Sawyer&#;s Bar and Forks of Salmon, a segment that had an estimated gold production of $25 million. Eddy&#;s Gulch, just south of Sawyer&#;s Bar, yielded $4 million.

Mines and claims of the Sawyers Bar, California area

Modern placer claim density corresponds with the details given in the description above. Township 21 N W, which is in the segment of river west of Sawyer&#;s Bar that reportedly produced $25 million in gold, is the top gold township in the Klamath Mountains with 63 claims.

3. Trinity River Districts

The various districts along the Trinity River are collectively credited with over $35 million dollars in gold production since the s. Much of this production came from hydraulic mines and gold dredges.

Trinity River placer gold mining areas

Modern day placer mining is concentrated west of Weaverville on the Trinity River, primarily in the Helena-East Fork and Big Bar districts. Canyon Creek, a tributary of the Trinity River, is also a location with many placer claims.

Township 21 N W, location of the Helena-East Fork district, is ranks number 3 in the Klamath Mountains for placer claim density with 50 claims.

Interestingly the most productive historical mining areas, many of which were dredged, have few active placer claims today. It seems the dredges did a thorough job of extracting gold from large areas of rich ground.

Southern California

The gold districts of Southern California are spread throughout a vast area that is largely desert but includes mountainous areas known as the transverse and peninsular ranges.

Click here to view a map of California&#;s geomorphic provinces to get a better idea of the geography of the gold districts in the southern part of the state.

Gold mining regions in Southern California

While Southern California has produced far less gold than the Sierra or Klamath mountains, it nonetheless has a long history of gold production and many districts are still active placer mining areas.

The desert regions of Southern California have large surface mining operations for commodities like borax and potash. These areas will have large land areas covered in placer claims, in some cases having over in a single township. Some of these townships happen to have a small number of gold mines adjacent to the modern surface mines, so by the methodology used to create the WMH Gold Maps, these townships are identified as areas of high gold potential when they are likely not.

Due to this complication with modern industrial surface mines, more care is needed in identifying and researching active gold mining areas. Whereas the previous regions were analyzed by looking first at claim density and then adding detail from the historical records of the corresponding mining districts, with Southern California we start mining districts that are known prospecting areas and look at the claim density as a secondary attribute.

With less emphasis on analysis of claims density, the Southern California gold districts are listed here in no particular order and without being ranked.

Known Placer Gold Areas of Southern California

Randsburg &#; The Rand district is Southern California&#;s largest historical gold producer. Today the area is popular with prospectors and prospecting clubs own claims that can be used by members.

Holcomb Valley and Baldwin Lake &#; Holcomb Valley and Baldwin Lake districts are on the north side of the San Bernardino Mountains near Big Bear.

Acton &#; The Acton district is just south of Lancaster. Townships 27 N W (10 placer claims) and 27 N W (15 placer claims) are the center of gold activity today.

Frazier Mountain &#; The Frazier Mountain district is in the northeast comer of Ventura County in the general vicinity of Frazier Mountain. With over 50 historical gold mines, this is one of Southern California&#;s more significant gold districts.

Julian &#; The Julian-Banner district was one of Southern California&#;s premier lode gold areas. Gold prospecting continues in this district today with over 10 active placer claims in township 27 S E.

Keyesville &#; The Keyesville and Kern River districts are located northeast of Bakersfield. This section of the Kern River was the site of a gold rush in the s. Today roughly 20 miles of the river between Keyesville and Bakersfield has active placer claims.

Kern River gold district

Lytle Creek &#; The Lytle Creek district is northwest of San Bernardino in the San Gabriel Mountains. With 34 placer claims, township 27 N W is one of Southern California&#;s most active modern placer mining areas.

Conclusion

California contains an incredible number of historical mines and mining districts spread over vast areas of mountain and desert terrain. Summarizing the state&#;s gold areas in a single article is almost an impossible task.

While this guide gives an overview of California&#;s top placer gold areas, it barely scratches the surface of what is actually out there. Future articles will take a closer look at many of the areas mentioned here, and explore areas that were not included.

In the meantime gold districts, mines, and placer claims can be researched for the entire state with the WMH Gold Maps for Google Earth Pro.

Notes on the Data Used in this Analysis

Claim counts were created using BLM active placer claim data distributed on August 1,

Gold mine numbers cited for each township are the number of USGS records, some of which are duplicates.

More From the Where to Find Gold Series

Where to Find Gold in Arizona

Where to Find Gold in Idaho

Where to Find Gold in Oregon

Where to Find Gold in Washington

Categories Where To Find GoldSours: https://westernmininghistory.com//where-to-find-gold-in-california/

Maps usgs california gold

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Where Can I Find Gold In South Dakota (USGS Gold Maps)

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