Mine detail: Defense Mine

Previously called 'Cold Spring MineNBMG Sample Site 2973Cold Springs'

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Location

Lat / long:

41.86431, -118.68795

Resource(M)

Primary:	Tungsten
Tertiary:	Copper
Ore:	Scheelite
Gangue:	Actinolite, Epidote, Garnet, Quartz
Orebody form:	TABULAR
Discovery year:	1942

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer

Geology

Host type:	Hornfels,Slate,Quartzite,Marble,Phyllite,Mica Schist
Associated type:	Gneiss
Structure:	Faults Striking Ne, Dipping Steeply Nw
Alteration processes:	Contact

References

MRDS	D011068
DEP	10014338
Reference	{Deposit:: QUADE, JACK, 1984, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS: NBMG UNPUBLISHED (TINGLEY) FILE.}{Deposit:: WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT COUNTY, NEVADA: NBMG BULL. 59.}{Deposit:: STAGER, H. K. AND TINGY, J. V., 1988, TUNGSTEN DEPOSITS IN NEVADA: NBMG BULL. 105, P. 96.}{Deposit:: STAGER, H.K., IN PREP}{Production:: STAGER AND TINGLEY}
Reporter	Blaskowski, Michael J. (Elliott, James E.), La Pointe, D.D. (Tingley, J.V.), Phinisey, J. D. (Marcus, S.), Humphries, S. E. (Marcus, S.), Li, Zhiping (Peters, S.)