Mine detail: Bonanza Mine

Previously called ''

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Location

Lat / long:

43.39425, -123.18366

Resource(M)

Primary:	Mercury
Ore:	Cinnabar, Mercury, Metacinnabar
Gangue:	Calcite, Chalcedony, Marcasite, Pyrite, Quartz, Siderite
Orebody form:	IRREGULAR LENSES
Discovery year:	1868

Production

Operation type:	Unknown
Production size:	Medium
Development status:	Past Producer
Production years:	1887 , 1937 - 1949 , 1951 - 1960
First production started:	1937
Last production ended:	1960

Geology

Host rock:	Umpqua;Umpqua;Umpqua
Host type:	Siltstone,Sandstone
Structure:	Ore Zone Is On The East Flank Of A Broad Anticline Striking N 25 E And Dipping 45 Se, Sandstone-Shale Contact
Alteration processes:	Silica, Carbonate And Clay Alteration And Impregnation Of Host Rocks

References

MRDS	M055187
DEP	10040416
Reference	{Deposit:: SCHUTTE, C. N., 1938, QUICKSILVER IN OREGON: ODGMI BULL. 4, P. 130-137}{Deposit:: BAILEY, E. H., USGS, PERSONAL FILES.}{Deposit:: BROOKS, H. C., 1963 , QUICKSILVER IN OREGON: ODGMI, BULL. 55 , 223 P.}{Deposit:: BROWN, R. E. AND WATERS, A. C., 1951 , QUICKSILVER DEPOSITS OF THE BONANZA - NONPAREIL DISTRICT, DOUGLAS COUNTY, OREGON: USGS BULL. 955 - F.}
Reporter	Bergquist, Joel R., Ferns, Mark L. (Brooks, Howard C.), Gray, Jerry J.