Mine detail: Mammoth Mine

Previously called 'Claims: MammothIron CrossHeclaGold LeafKeynote'

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Location

Lat / long:

48.75315, -120.71509

Resource(M)

Primary:	Gold, Silver
Tertiary:	Lead, Zinc, Arsenic
Ore:	Chalcopyrite, Galena, Gold, Pyrite, Sphalerite
Gangue:	Quartz
Orebody form:	VEINS
Discovery year:	1895

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1898
Last production ended:	1942

Geology

Host rock:	Harts Pass Group, Harts Pass Formation;Harts Pass Group, Harts Pass Formation
Host type:	Sandstone
Structure:	Jur-Cret Fold And Thrust Belt, Faults (N45-60w, 40-55ne) Offset Vein As Much As 25 Ft
Tectonic:	Cascade Volcanic Arc
Alteration processes:	Oxidation

References

MRDS	M700062
DEP	10047782
Reference	{Deposit:: MOEN, W.S., 1969, MINES AND MINERAL DEPOSITS OF WHATCOM COUNTY, WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 57, P. 112.}{Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 178.}{Deposit:: DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 561.}{Deposit:: STOFFEL, K.L., AND MCGRODER, M.F., 1990, GEOLOGIC MAP OF THE ROBINSON MTN. 1:100,000 QUADRANGLE, WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-5, SCALE 1:100,000.}{Production:: MOEN, W.S., 1969, P. 111; HUNTTING, M.T., 1956, P. 178; GRANT, 1976, P. 29}
Reporter	Caress, Mary E. (Evarts, Russ), Peterson, Jocelyn A.