Mine detail: Steen Mtn.

Previously called 'Stephanson and Bradley'

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Location: Harney County, Oregon, United States, North America
Lat / long: 42.57348, -118.55102
dep_id: 10040269
mrds_id: M054972
Commodity type: metallic
Major mineral: Mercury
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Cinnabar, Limonite
gangue: Clay
work_type: Surface/Underground
model: 177: Hot-spring Hg
alteration: Silicification, Clay Alteration
conc_proc: Hydrothermal Solutions
ore_ctrl: Two Sets Of Fractures
Reporter: Ferns, Mark L. (Brooks, Howard C.), Gray, Jerry J., Li, Zhiping (Peters, S.), Peterson, Jocelyn A.
hrock_unit: Pike Creek Formation
hrock_type: Rhyolite
disc_yr: 1938
prod_yrs: 1941 - 1942, 1961
discr: Glenn Stephenson, Bert Roark
References:
  • 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
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