Counties, states, countries, continents, or oceans | |
Placer | county |
California | state |
United States | country |
North America | continent |
Land | continent |
Map quadrangles, from USGS or Canadian NTS | |
Foresthill | quadrangle 1:24,000 scale |
Truckee | quadrangle 1:100,000 scale |
Chico | quadrangle 1:250,000 scale |
Watershed boundaries (USGS hydrologic units) | |
North Fork American | hydrologic unit |
Lower Sacramento | hydrologic accounting unit |
Sacramento | hydrologic subregion |
California | hydrologic region |
Unit | State | Lithology |
---|---|---|
Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada) | CA | Ordovician to Triassic |
Ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains) | CA | Late Proterozoic(?) to Early Jurassic |
ID | Data type | Description |
---|---|---|
North Sierra Foothills | M-D | North Sierra Foothills 8481 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 |
Tract | Deposit Type | Mineralization age |
---|---|---|
PC03 | Skarn Cu | Mesozoic |
PC08 | Porphyry Cu | Mesozoic |
PC40 | Low-sulfide Au-quartz vein | Mesozoic |
Domain | Crust type | Region |
---|---|---|
Calaveras-Baker | Accretionary wedge | Western Cordillera |
Site name | Development | Commodities |
---|---|---|
Marigold Occurrence | Occurrence | CR |
West Quartz | Past Producer | AU |
Doherty | Past Producer | AU |
Doherty Prospect | Occurrence | AU |
Doherty | Occurrence | AU |
Deposit name | Deposit type | Location |
---|---|---|
Spanish Mines Consolidated | Producer | California, United States |
Poco Tiempo Quartz Mine | Past Producer | California, United States |
Spanish Mines Cons | Past Producer | California, United States |
Marigold Occurrence | Occurrence | California, United States |
Duffey Lease | Past Producer | California, United States |
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 |
Feature ID | Feature type | Feature name |
---|---|---|
Prospect Pit | point | |
Adit | point | |
Prospect Pit | point | |
Adit | point |