Mine detail: Mammoth

Previously called 'AndersonGillespieSheridanMayflower'

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Location

Lat / long: 40.76098, -122.45473

Resource(B)

Primary: Sulfur, Silver, Zinc, Copper
Secondary: Cadmium, Gold, Lead
Tertiary: Iron
Ore: Pyrite, Chalcopyrite, Sphalerite, Galena, Tetrahedrite, Tennantite, Arsenopyrite, Bornite, Idaite, Digenite, Covellite, Chalcocite, Quartz, Sericite, Calcite, Chlorite
Orebody form: Lens
Discovery year: 1880

Production

Operation type: Underground
Deposit type: Stratabound exhalative
Development status: Past Producer

Geology

Host rock:Balaklala Rhyolite
Host type:Volcanic Rock (Aphanitic),Rhyolite,Volcanic Breccia (Agglomerate),Tuff
Associated rock:Mule Mountain stock, Copley Greenstone
Associated type:Trondhjemite,Basalt,Andesite
Structure:California Fault, Eureka Fault, Yolo Fault, 313 Fault, 12 Drift Fault, and Gossan Fault. All are post-ore normal faults that offset the orebodies., None identified
Tectonic:Back-arc marginal basin
Alteration processes:Sericitic; quartz, sericite, pyrite, chlorite Hematitic (gossan); hematite Gossan and minor supergene enrichment are present locally. Oxidation is known to extend up to 150 feet in from the present erosion surface. Throughout the district, hydrothermal alteration, pervasive below the ore zone and absent above, developed a quartz-sericite-pyrite+/-chlorite assemblage (Kistler and others, 1985 and Reed, 1984).

References

DEP10310642
Reference{Deposit:: Albers, J.P. and Bain, J.H.C., 1985, Regional setting and new information on some critical geologic features of the West Shasta District, California: Economic Geology, v. 80, p. 2072-2091.}{Deposit:: Averill, C.V., 1939, Mineral resources of Shasta County: California Journal of Mines and Geology, v. 35, no. 2, p. 108-191.}{Deposit:: Bence, A.E. and Taylor, B.E., 1985, Rare earth element systematics of West Shasta metavolcanics rocks: petrogenesis and hydrothermal alteration: Economic Geology, v. 80, p. 2164-2176.}{Deposit:: Brown, G.C., 1915, The counties of Shasta, Siskiyou, Trinity: California State Mining Bureau 14th Report of the State Mineralogist, p. 767-769.}{Deposit:: Doe, B.R. and others, 1985, The plumbotectonics of the West Shasta Mining District, California: Economic Geology, v. 80, p. 2136-2148.}{Deposit:: Fraticelli, L.A. and others, 1987, Geologic map of the Redding 1 x 2 degree quadrangle: Shasta, Tehama, Humboldt, and Trinity counties, California: U.S. Geological Survey Open-File Report 87-257, scale 1:250,000.}{Deposit:: Guilbert, J.M. and Park, C.F., Jr., 1986, The geology of ore deposits: W.H. Freeman and Company, New York, p. 589-595.}{Deposit:: Hassemer, J.R., 1983, Some preliminary findings of a reconnaissance geochemistry study, West Shasta District, California: U.S. Geological Survey Open-File Report 83-57, 16 p.}{Deposit:: Horton, R.J. and others, 1985, Electrical geophysical investigations of massive sulfide deposits and their host rocks, West Shasta Copper-Zinc District: Economic Geology, v. 80, p. 2213-2229.}{Deposit:: Howe, S.S., 1985, Mineralogy, textures, and relative age relationships of massive sulfide ore in the West Shasta District, California: Economic Geology, v. 80, p 2114-2127.}{Deposit:: Huston, D.L., and others, 1996, Productivity of volcanic-hosted massive sulfide districts: New constraints from the d18O of quartz phenocrysts in cogenetic felsic rocks: Geology, v. 24, P. 459-462.}{Deposit:: Hutchinson, R.W. and Albers, J.P., 1992, Metallogenic evolution of the Cordilleran region of the western United States, in Burchfiel, B.C. and others, editors, The Cordilleran Orogen: Conterminous U.S.: Geological Society of America, The Geology of North America, v. G-3. p. 629-652.}{Deposit:: Irwin, W.P., 1981, Tectonic accretion of the Klamath Mountains, in Ernst, W.G., editor, The geotectonic development of California: Prentice-Hall, Englewood Cliffs, New Jersey, p. 29-49.}{Deposit:: Irwin, W.P., 1994, Geologic map of the Klamath Mountains, California and Oregon: U.S. Geological Survey MIS Map I-2148, scale 1:500,000.}{Deposit:: Irwin, W.P. and Mankinen, E.A., 1998, Rotational and accretionary evolution of the Klamath Mountains, California and Oregon, from Devonian to present time: U.S. Geological Survey Open-File Report 98-114.}{Deposit:: Jenkins, O.P., 1948, Copper in California: California Division of Mines Bulletin 144, p. 334.}{Deposit:: Kinkel, A.R., Jr. and Hall, W.E., 1952, Geology of the Mammoth Mine, Shasta County, California: California Division of Mines Special Report 28, 16 p.}{Deposit:: Kinkel, A.R., Jr. and others, 1956, Geology and base-metal deposits of West Shasta Copper-Zinc District, Shasta County, California: U.S. Geological Survey Professional Paper 285, 156 p.}{Deposit:: Kinkel, A.R. and Kinkel, A.R., Jr., 1966, Copper, in Albers, J.P., editor, Mineral resources of California: California Division of Mines and Geology Bulletin 191, p.141-150.}{Deposit:: Kistler, R.W. and others, 1985, A reconnaissance Rb-Sr, Sm-Nb, U-Pb, and K-Ar study of some host rocks and ore minerals in the West Shasta Cu-Zn District, California: Economic Geology, v. 80, p. 2128-2135.}{Deposit:: Lapierre, H. and others, 1985, Geodynamic setting of early Devonian Kuroko-type sulfide deposits in the eastern Klamath Mountains (Northern California) inferred by the petrological and geochemical characteristics of the associated island-arc volcanic rocks: Economic Geology, v. 80, p. 2100-2113.}{Deposit:: Lindberg, P.A., 1985, A volcanogenic interpretation for massive sulfide origin, West Shasta District, California: Economic Geology, v. 80, p. 2240-2254.}{Deposit:: Lydon, P.A. and O?Brien, J.C., 1974, Mines and mineral resources of Shasta County, California: California Division of Mines and Geology County Report 6, 154 p.}{Deposit:: Miller, E.L. and others, 1992, Late Paleozoic paleogeographic and tectonic evolution of the western U.S. Cordillera, in Burchfiel, B.C. and others, editors, The Cordilleran Orogen: Conterminous U.S.: Geological Society of America, The Geology of North America, v. G-3. p. 57-106.}{Deposit:: O?Brien, J.C., 1957, Copper, in Wright, L.A., editor, Mineral commodities of California: California Division of Mines Bulletin 176, p.169-182.}{Deposit:: Poole, F.G. and others, 1992, Latest Precambrian to latest Devonian time; Development of a continental margin, in Burchfiel, B.C. and others, editors, The Cordilleran Orogen: Conterminous U.S.: Geological Society of America, The Geology of North America, v. G-3. p. 9-56.}{Deposit:: Potter, A.W. and others, 1990, Early Paleozoic stratigraphic, paleogeographic, and biogeographic relations of the eastern Klamath belt, northern California, in Harwood, D.S. and Miller, M.M., editors, Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes: Geological Society of America Special Paper 255, p. 57-74.}{Deposit:: Raines, G.L. and others, 1985, Near-infrared spectra of West Shasta gossans compared with true and false gossans from Australia and Saudi Arabia: Economic Geology, v. 80, p. 2230-2239.}{Deposit:: Reed, M.H., 1984, Geology, wall-rock alteration, and massive sulfide mineralization in a portion of the West Shasta District, California: Economic Geology, v. 79, p. 1299-1318.}{Deposit:: Saleeby, J.B., 1992, Petrotectonic and paleogeographic settings of U.S. Cordilleran ophiolites, in Burchfiel, B. C. and others, editors, The Cordilleran Orogen: Conterminous U.S.: Geological Society of America, The Geology of North America, v. G-3. p. 653-682.}{Deposit:: Singer, D.A., 1986, Descriptive model of Kuroko massive sulfide, in Cox, D.P. and Singer, D.A., editors, Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 189-190.}{Deposit:: Stevens, C.H. and others, 1990, Significance of the provincial signature of Early Permian fauna of the eastern Klamath terrane, in Harwood, D.S. and Miller, M.M., editors, Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes: Geological Society of America Special Paper 255, p. 201-218.}{Deposit:: Strand, R.G., 1962, Geologic atlas of California: Redding Sheet: California Division of Mines and Geology GAM 011, scale 1:250,000.}{Deposit:: Taylor, B.E. and South, B.C., 1985, Regional stable isotope systematics of hydrothermal alteration and massive sulfide deposition in the West Shasta District, California: Economic Geology, v. 80, p. 2149-2163.}{Deposit:: Tucker, W.B., 1926, Shasta County: California State Mining Bureau 22nd Report of the State Mineralogist, p. 121-216.}{Deposit:: Watkins, R. and Stensrud, H.L., 1983, Age of sulfide ores in the West Shasta and East Shasta Districts, Klamath Mountains, California: Economic Geology, v. 78, p. 340-343.}{Deposit:: Brown, G.C., 1913, Field report on Mammoth Mine (File Number 322-5690, CDMG Mineral Resources Files, Sacramento).}
ReporterFuller, Michael S. (Higgins, Chris T.), Schruben, Paul G.