The Sour Dough is a chromium mine located in Curry county, Oregon at an elevation of 1,499 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: 1,499 Feet (457 Meters)
Commodity: Chromium
Lat, Long: 42.04083, -123.94917
Map: View on Google Maps
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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.
Sour Dough MRDS details
Site Name
Primary: Sour Dough
Secondary: Baldface
Commodity
Primary: Chromium
Location
State: Oregon
County: Curry
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
Not available
Production
Year: 1958
Time Period: 1918-1958
Material type: ORE
Description: Cp_Grade: ^44% Cr2o3 To 52% Cr2o3 Conc. And Ore
Year: 1918
Material type: ORE
Description: Ap_Grade: ^40. % Cr2o3 - 42. % Cr2o3, Prob. From 625 T. Mined
Year: 1941
Material type: ORE
Description: Ap_Grade: ^45. % Cr2o3
Year: 1942
Material type: ORE
Description: Ap_Grade: ^42. % Cr2o3 - 47. % Cr2o3, 2.8 Cr - 2.9 Cr, Fe
Year: 1944
Material type: ORE
Description: Ap_Grade: ^38. % Cr2o3 - 46. % Cr2o3, 2.6 Cr - 3.0 Cr, Fe
Year: 1918
Material type: ORE
Description: Ap_Grade: ^50. % Cr2o3, From 500 T. Mined.
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Klamath Mountains
Mineral Deposit Model
Not available
Orebody
Form: LENS, LAYER
Structure
Type: L
Description: East Limb Of Northwest - Plunging Anticline; Faults And Shear Zones
Alterations
Not available
Rocks
Name: Dunite
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Not available
Materials
Ore: Chromite
Comments
Comment (Production): RAMP SAYS .312 TONS OF 50% CR2O3 W/2.7 CR:FE & .100 TONS OF 48% CR2O3 W/3.0 CR:FE (LUMP ORE)
Comment (Deposit): CONTINUITY DISRUPTED BY SHEARING, FAULTING
Comment (Deposit): RECORD NUMBERS (M013198) AND (W017046) HAVE BEEN MERGED WITH THIS RECORD AND DELETED FROM THE OREGON FILE.
Comment (Geology): DISSEMINATED AND BANDED CHROMITE OCCUR IN A NARROW DUNITE ZONE IN HARZBURGITE.
References
Reference (Deposit): THAYER, T. P., 1974, UNPUBL. DATA
Reference (Deposit): RAMP, L. AND OTHERS, 1977, GEOLOGY, MINERAL RESOURCES AND ROCK MATERIAL OF CURRY COUNTY, OREGON; ODGMI BULL. 93, P.31
Reference (Production): THAYER FILES & RAMP
Reference (Deposit): WELLS, F.G. AND OTHERS, 1940, CHROMITE DEPOSITS IN THE SOURDOUGH AREA, CURRY COUNTY AND THE BRIGGS CREEK AREA, JOSEPHINE COUNTY, OREGON; USGS BULL. 922-P, P.475
Reference (Deposit): RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPT. GEOLOGY AND MINERAL IND. BULL. 52, 169 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.
