Mine detail: Steen Mtn.

Previously called 'Stephanson and Bradley'

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Location

Lat / long: 42.57348, -118.55102

Resource(M)

Primary: Mercury
Ore: Cinnabar, Limonite
Gangue: Clay
Discovery year: 1938

Production

Operation type: Unknown
Production size: Small
Development status: Past Producer
Production years: 1941 - 1942, 1961

Geology

Host rock:Pike Creek Formation
Host type:Rhyolite
Alteration processes:Silicification, Clay Alteration

References

MRDSM054972
DEP10040269
Reference{Deposit:: BROOKS, H. C., 1963, QUICKSILVER IN OREGON: OREGON DEPT. OF GEOLOGY AND MINERAL INDUSTRIES, BULL. 55, 223 P.}{Deposit:: BAILEY, E. H., USGS, PERSONAL FILES}{Deposit:: MERCURY IN OREGON, 1965, USBM IC 8252}{Deposit:: FREDERICK, F., 1945, STATE OF OREGON MAP SHOWING LOCATION OF QUICKSILVER DEPOSITS: OREGON DEPT. OF GEOL. AND MIN. INDUSTRIES, SCALE 1:1,000,000}{Deposit:: 5) ROSS, C.P., 1942, QUICKSILVER DEPOSITS}
ReporterFerns, Mark L. (Brooks, Howard C.), Gray, Jerry J., Li, Zhiping (Peters, S.), Peterson, Jocelyn A.