The Twin Cedars Claims is a chromium mine located in Josephine county, Oregon at an elevation of 2,549 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 2,549 Feet (777 Meters)
Commodity: Chromium
Lat, Long: 42.29194, -123.80833
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Twin Cedars Claims MRDS details
Site Name
Primary: Twin Cedars Claims
Commodity
Primary: Chromium
Tertiary: Platinum
Tertiary: Palladium
Tertiary: Iridium
Tertiary: Ruthenium
Tertiary: Rhodium
Location
State: Oregon
County: Josephine
District: Pearsoll Peak Area
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Siskiyou National Forest
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Mc Caleb, Mrs. B. A.
Years: 1956 -
Production
Year: 1957
Material type: ORE
Description: Ap_Grade: ^44% Cr2o3 (Weighted Average Grade)
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Klamath Mountains
Mineral Deposit Model
Model Name: Podiform chromite (minor)
Orebody
Form: NARROW STRINGERS
Structure
Not available
Alterations
Not available
Rocks
Name: Dunite
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Name: Dunite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Jurassic
Analytical Data
Analytical Data: RH=<5 PPB.
Analytical Data: RU=<100 PPB
Analytical Data: IR=<20 PPB
Analytical Data: PD=8 PPB
Analytical Data: PANNED CONCENTRATE OF SAMPLE GAVE 40.3% CR2O3, 2.19 CR:FE. SAMPLE OF MASSIVE ORE GAVE 24.7% CR2O3, 9.10% FE, 12.1% SIO2. ANOTHER PANNED CONCENTRATE YIELDED 41.94% CR2O3, 23.32% FE. 1 PGE ANALYSIS: PT=<10 PPB
Analytical Data: ABOUT 25% CR2O3
Materials
Ore: Chromite
Gangue: Uvarovite
Gangue: Talc
Comments
Comment (Production): IN 1958 3 TONS OF LOW-GRADE ORE PILED NEAR CUTS.
Comment (Deposit): MOST NOT IN PLACE; ORE ON DUMPS. ODGMI'S MILOC FILE INDICATES THAT MASSIVE AND DISSEMINATED ORE ARE PRESENT
Comment (Workings): SEVERAL OPEN CUTS
Comment (Location): LOCATION GIVEN IS FOR PGE SAMPLE SITE LOCATION. TOPO MAP DOES NOT SHOW A PROSPECT IN AREA.
Comment (Commodity): 2 DEPOSIT - UPPER AND LOWER; LOW GRADE; AL>MG
References
Reference (Deposit): THAYER, T.P., 1974, U.S. GEOLOGICAL SURVEY, UNPUB. DATA.
Reference (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.
Reference (Deposit): RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 52, P. 42.
Reference (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.
Oregon Gold
"Where to Find Gold in Oregon" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Oregon. Read more: Where to Find Gold in Oregon.
