Mammoth Cons.

The Mammoth Cons. is a silver and gold mine located in Mono county, California at an elevation of 9,199 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 Cons.
Secondary: Crystal Craig
Secondary: Mammoth

Commodity

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

Location

State: California
County: Mono
District: Mammoth Lakes

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: 1881
Time Period: 1878 - 1881
Year: 1941
Time Period: 1939 - 1941

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: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada

Mineral Deposit Model

Not available

Orebody

Form: PINCH-SWELL

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrrhotite
Ore: Sphalerite
Ore: Galena
Ore: Silver
Ore: Gold
Ore: Pyrite
Gangue: Calcite
Gangue: Quartz

Comments

Comment (Commodity): AU BULLION REPORTEDLY VALUED AT $7 - $16/OZ. GRADE OF ORE EST. AT $9 - $15/TON.

Comment (Workings): II BY THE AMERICAN METALS CO. FOUND NO ADDITIONAL ORE AND THE MINE WAS CLOSED AFTER 1956.

Comment (Geology): META-LATITE IS DECOMPOSED. ; GEOL.DESC: MINERALIZATION, CONFINED TO 500 FT. WIDE BELT IN CRYSTALLINE ROCKS

Comment (Deposit): COMPRISES 27 CLAIMS. ; INFO.SRC : 1 PUB LIT

Comment (Workings): PRINCIPAL DEVELOPMENT CONSISTS OF TWO TUNNELS. UPPER TUNNEL IS A CROSSCUT DRIVEN EAST 65 FT. TO THE VEIN; DRIFT NORTH 250 FT., 200 FT. OF WHICH IS REPORTED TO BE IN ORE. WHERE CROSSCUT CUTS THE VEIN, THERE IS A RAISE FROM THE LOWER TUNNEL WHICH HAS BEEN DRIVEN 25 FT. ABOVE THE UPPER TUNNEL. AT ONE PLACE IN THIS TUNNEL, CROSSCUTS INDICATE A MINERALIZED WIDTH OF 25 FT. THE LOWER TUNNEL, APPROXIMATELY 100 FT. BELOW THE UPPER ONE, IS A CROSSCUT EAST 40 FT. TO THE VEIN; DRIFT SOUTHEAST 480 FT. AT 280 FT. FROM CROSSCUT THERE IS ANOTHER CROSSCUT NORTHEAST 50 FT. AND ANOTHER CROSSCUT NORTHEAST 20 FT. AT 180 FT. AT 360 FT. FROM THE MAIN CROSSCUT THERE IS A RAISE CONNECTING WITH UPPER TUNNEL. ABOUT 280 FT. NORTHEAST OF THIS VEIN IS THE DOME VEIN ROUGHLY PARALLEL, WHICH SHOWS ON SURFACE UP TO 20 FT. IN WIDTH. NO WORK HAS BEEN DONE HERE. ON THE ARGOSY GROUP, ABOUT 3000 FT. SOUTH OF THE ABOVE DESCRIBED WORKINGS AND JUST NORTH OF MAMMOTH CREEK FALLS, A TUNNEL HAS BEEN DRIVEN 150 FT. ON A

Comment (Workings): VEIN 6 FT. TO 8 FT. WIDE. ON THE WEST SIDE OF THE CREEK, TWO CROSSCUTS 50 FT. AND 75 FT., ARE REPORTED TO CARRY VALUES THROUGHOUT. DEFINITE AVERAGE VALUES WERE NOT OBTAINABLE. THE MAMMOTH MINE IS DEVELOPED BY FOUR TUNNELS. THE LOWER TUNNEL (NO. 4), AT AN ELEVATION OF 8900 FT., WAS DRIVEN N 35 DEG. W., 1650 FT. AT 465 FT., THERE IS A CROSSCUT S 55 DEG. W., 87 FT. SAID TO BE ALL IN QUARTZ, WITHOUT HAVING REACHED THE FOOTWALL. AT 1105 FT., THERE IS A CROSSCUT S 55 DEG. W., 50 FT. THERE ARE OTHER WORKINGS IN THIS TUNNEL (WHICH IS INACCESSIBLE), DESCRIPTION OF WHICH IS NOT AVAILABLE. TUNNEL NO. 3, AT AN ELEVATION OF 9275 FT. HAS BEEN DRIVEN 1250 FT. WITH A 50-FT. CROSSCUT AT ABOUT 470 FT. FROM THE PORTAL. TUNNEL NO. 2 AT 9475 FT. ELEVATION IS 600 FT. LONG. TUNNEL NO. 1, ELEVATION 9600 FT., IS ABOUT 300 FT. LONG AND SOME 600 FT. BELOW THE TOP OF THE MOUNTAIN. THESE WORKINGS ARE ALL INACCESSIBLE AND FIGURES ARE TAKEN FROM OLE REPORTS AND MAPS. ADDITIONAL WORKINGS AFTER WORLD WAR

Comment (Location): UTM ACC. S 1/2 SW 1/4 15

Comment (Production): NO OTHER PRODUCTION RECORDS FOUND.

Comment (Deposit): FRACTURE ZONES AND VEINS - AVG. 15 FT. THICK.

References

Reference (Deposit): RINEHART, C. D., AND ROSS, D. C., 1964 , GEOLOGY AND MINERAL DEPOSITS OF THE MOUNT MORRISON QUADRANGLE, SIERRA NEVADA, CALIFORNIA; US GEOLOGICAL SURVEY PROFESSIONAL PAPER NO. 385 , P. 98 - 99 .

Reference (Production): TUCKER & SAMPSON ( 1940 ), RINEHART AND ROSS ( 1964 )

Reference (Deposit): TUCKER, W. B., AND SAMPSON, R. J., 1940 , MINERAL RESOURCES OF MONO COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 36 , NO. 2 , P. 127 - 128 , PL. 1 .

Reference (Deposit): TUCKER, W. B., 1934 , CURRENT MINING ACTIVITY IN SOUTHERN CALIFORNIA; MONO COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 30 , NO. 4 , P. 320 .

Reference (Deposit): GOODWIN, J. G., 1957 , LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 53 , NOS. 3 & 4 , P. 563 - 564 .

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.