Mammoth

The Mammoth is a copper and zinc mine located in Shasta county, California at an elevation of 2,500 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Mammoth
Secondary: Anderson
Secondary: Mayflower
Secondary: Sheridan
Secondary: Gillispie

Commodity

Primary: Copper
Primary: Zinc
Secondary: Silver
Secondary: Gold

Location

State: California
County: Shasta
District: West Shasta Copper - Zinc

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Year: 1915
Time Period: 1914 - 1915
Material type: ZN
Description: Cp_Grade: ^21.1 % Zn, 2.4 % Cu, 5.79 Oz/Ton Ag, .078 Oz/Ton Au.
Year: 1925
Time Period: 1905 - 1925
Material type: CU
Description: Cp_Grade: ^40.4 % S, 34.3 % Fe, 4.2 % Zn, 3.99 % Cu, 2.24 Oz/Ton Ag, .038 Oz/Ton Au.

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: L

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Klamath Mountains

Mineral Deposit Model

Model Name: Massive sulfide, kuroko

Orebody

Form: TABULAR

Structure

Type: L
Description: Folds And Faults, The Principal Faults Are The California, The 12 - Drift, The Schoolhouse, The Gossan, The Friday And The Clark. All These Faults, The North Or East Side Has Moved Down Relative To The South Or West. The Horizontal Component Is Only Known For The California, It Is 250 Ft.

Alterations

Not available

Rocks

Name: Rhyolite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Devonian

Name: Rhyolite
Role: Host
Age Type: Host Rock
Age Young: Late Devonian

Analytical Data

Not available

Materials

Ore: Pyrite

Comments

Comment (Commodity): PYRITE IS MAJOR ORE COMPONENT

Comment (Deposit): ORE FORMED BY REPLACEMENT OF ROCKS IN THE UPPERMOST PART OF THE MIDDLE UNIT OF THE BALAKLALA RHYOLITE.

Comment (Workings): MINE AREA WAS EXTENSIVELY DEVELOPED BY THOUSANDS OF FEET OF WORKINGS APPENDED TO NINE PRINCIPAL ADITS

Comment (Geology): GEOL.DESC: BALAKLALA RHYOLITE IN MINED AREA CONSISTS OF PORPHYRITIC AND NONPORPHYRITIC RHYOLITE FLOWS AND INTERCALATED COARSE AND FINE RHYOLITIC PYROCLASTIC MATERIAL. ORE ZONE IS IN THE UPPERMOST PART OF THE MIDDLE UNIT, IMMEDIATELY UNDER THE BASE OF THE UPPER UNIT. LOWER UNIT CONSISTS MAINLY OF LIGHT - GRAY TO LIGHT - GREEN NONPORPHYRITIC RHYOLITE AND RHYOLITIC TUFF AND VOLCANIC BRECCIA. THE MIDDLE UNIT RANGES IN THICKNESS FROM 150 - 300 FT. IT CONSISTS OF LIGHT GRAY TO GREEN PORPHYRITIC RHYOLITE FLOWS AND PYROCLASTIC ROCKS. THE UPPER UNIT IS COARSE PORPHYRITIC RHYOLITE CONTAINING QUARTZ AND FELDSPAR PHENOCRYSTS, IT IS 1400 FT. THICK AT MAMMOTH BUTTE BUT THINS RAPIDLY TOWARD THE EAST. THE UPPER UNIT FORMS THE "CUPROCK" FOR THE ORE DEPOSITS.

References

Reference (Production): KINKEL ET AL, 1956 , PG. 133, (SEE REF.)

Reference (Deposit): KINKEL, A. R., HALL, W. E., AND ALBERS, J. P., 1956 , GEOLOGY AND BASE - METAL DEPOSITS OF WEST SHASTA COPPER - ZINC DISTRICT SHASTA COUNTY, CALIF.; GEOLOGICAL SURVEY PROFESSIONAL PAPER 285 , PG. 133 - 138

California Gold

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.