Commodities
PrimaryChromium
TertiaryPlatinum, Palladium, Iridium, Ruthenium, Rhodium
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
Orebody formMASSIVE AND DISSEMINATED. IRREGULAR LENSES AND KIDNEYS
Ore controlMagmatic Segregation
Materials
Ore mineralsChromite
GangueAntigorite, Uvarovite
Geology
Host rockDunite · Canyon Mountain Complex
Associated rockPeridotite · Sedimentary Rocks;Canyon Mountain Complex
StructureProminent Jointing Gives Rocks A Platy Character
Tectonic settingOchoco-Blue Mountains
AlterationSerpentinization. Dunite Is Cut By Serpentine Stringers
Economic & production
Development statusPast Producer
First production1918
Identification
Deposit ID10033039
MRDS IDM014921
RegionNA
Data scoreB
Coordinates44.35096, -118.81467
References
ALLEN, J.E., 1941, CHROMITE DEPOSITS OF OREGON (REVISED ED.): OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 9, P. 60-62.OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES, 1941, OREGON METAL MINES HANDBOOK, NORTHEASTERN OREGON--WEST HALF: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 14-B, P. 21-22.WESTGATE, L.G., 1921, DEPOSITS OF CHROMITE IN EASTERN OREGON, IN CONTRIBUTIONS TO ECONOMIC GEOLOGY 1920: U.S. GEOLOGICAL SURVEY BULLETIN 725, P. 47.HUNDHAUSEN, R.J., BANNING, L.H., HARRIS, H.M., AND KELLY, H.J., 1956, EXPLORATION AND UTILIZATION STUDIES, JOHN DAY CHROMITES, OREGON: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 5238, P. 9-14.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.THAYER, T.P., 1940, CHROMITE DEPOSITS OF GRANT COUNTY, OREGON: U.S. GEOLOGICAL SURVEY BULLETIN 922-D, P. 96-98.