Mine detail: Oregon Chrome Mine

Previously called 'Robertson'

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Location

Lat / long: 42.34454, -123.7756

Resource(M)

Primary: Chromium
Tertiary: Platinum, Palladium, Ruthenium, Rhodium, Iridium
Ore: Chromite
Gangue: Olivine, Serpentine
Orebody form: TABULAR
Discovery year: 1917

Production

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

Geology

Host rock:Pearsoll Peak Ophiolite
Host type:Dunite
Structure:Near Axis Of A Southwest-Plunging Syncline, Shearing And Stretching Of Original Layer
Tectonic:Klamath Mountains Accreted Terrane
Alteration processes:Serpentinization

References

MRDSM060541
DEP10042661
Reference{Deposit:: RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 52, P. 50-53.}{Deposit:: THAYER, T.P., 1974, U.S. GEOLOGICAL SURVEY, UNPUB. DATA.}{Deposit:: PAGE, N.J, JOHNSON, M.G., HAFFTY, JOSEPH, AND RAMP, LEN, 1975, OCCURRENCE OF PLATINUM GROUP METALS IN ULTRAMAFIC ROCKS OF THE MEDFORD-COOS BAY 2 DEGREE QUADRANGLE, SOUTHWESTERN OREGON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-694, SCALE 1:250,000.}{Deposit:: RAMP, LEN, AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 100, TABLE 7.}{Deposit:: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES, 1952, OREGON METAL MINES HANDBOOK, SOUTHWESTERN OREGON--JOSEPHINE COUNTY (2D ED.): OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 14-C, V. 2, SEC. 1, P. 139-140.}{Deposit:: CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.}{Production:: STATISTICS PREPARED BY MRS. WM. ROBERTSON; THAYER RECORDS AGREE}
ReporterJohnson, Maureen G., Ferns, Mark L. (Brooks, Howard C.), Peterson, Jocelyn A.