Mine detail: Riddle Mine

Previously called 'Nickel Mountain'

<< Back to the map

Location

Lat / long: 42.96371, -123.44338

Resource(M)

Primary: Nickel, Iron, Cobalt
Discovery year: 1864

Production

Operation type: Unknown
Production size: Yes
Development status: Producer
First production started: 1954
Last production ended: 1983

Geology

Host type:Peridotite,Serpentinite
Structure:Tropical Weathering Of Ultramafic Rocks
Tectonic:Orogenic Belt
Alteration processes:Laterization

References

MRDSISM0232
DEP10024510
Reference{Deposit:: GUSTAFSON, J.R., 1958, THE RIDDLE NICKEL PROJECT: PAPER PRESENTED AT AMERICAN INSTITUTE OF MINING, METALLURGICAL -AND PETROLEUM ENGINEERS SOUTHERN CALIFORNIA SECTION MEETING. -(RR1)}{Deposit:: ROWE, W.A., MEJIA, V.M., CUMBERLIDGE, J.T., AND MATTSON, L.A., 1976, GEOLOGY OF THE NICKEL MOUNTAIN MINE, RIDDLE, -OREGON, IN WEISS, ALFRED. ED., WORLD MINING AND METALS TECHNOL-OGY, PROCEEDINGS OF THE JOINT MMIJ-AIME MEETING, DENVER, COLO.-, P. 25-46.}{Deposit:: CHACE, F.M., CUMBERLIDGE, J.T., CAMERON, S.L., AND VAN NORT, S.D., 1969, APPLIED GEOLOGY AT THE NICKEL MOUNTAIN MI-NE, RIDDLE, OREGON: ECONOMIC GEOLOGY, V. 64, NO. 1, P. 1-16.}{Deposit:: U.S. BUREAU OF MINES, 1955-1981, MINERALS YEARBOOK (NICKEL CHAPTER): WASHINGTON, D.C., U.S. GOVERNMENT PRINTING OF-FICE. (A2-PA4, PC1)}{Deposit:: SIBLEY, S.F., 1983, NICKEL, IN U.S. BUREAU OF MINES, MINERAL COMMODITY SUMMARIES--1982, P. 106-107. (PA1, PC1)}{Deposit:: PETERS, H., 1984, HANNA NICKEL TRIES AGAIN: METAL BULLETIN MONTHLY, NO. 161 [MAY], P. 51-59. (PA8)}{Production:: PA1: RF5, P. 107; PA2-PA4: RF4, 1972-81; PA8: RF6. PC1: RF4, 1955-1981; RF5, P. 107.}
ReporterFoose, Michael P.