The Calpella is a iridium, platinum, gold, and osmium mine located in Mendocino county, California at an elevation of 876 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: 876 Feet (267 Meters)
Commodity: Iridium, Platinum, Gold, Osmium
Lat, Long: 39.2225, -123.21028
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.
Calpella MRDS details
Site Name
Primary: Calpella
Commodity
Primary: Iridium
Primary: Platinum
Primary: Gold
Primary: Osmium
Location
State: California
County: Mendocino
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Stream Placer
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: California Coast Ranges
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Form: TERRACE
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: ANOTHER 190 GR AU AND 160 GR PT.
Analytical Data: ANALYSIS OF OSMIRIDIUM GRAIN YIELDED 49% IR, 32% OS, 10% PT. ONE PAN SHOWED 2 OZ PT
Materials
Not available
Comments
Comment (Location): PARTLY UNSURVEYED. LOCATION SHOWN IS ABOUT 0.5 MI UPSTREAM FROM MOUTH OF GULCH AT RUSSIAN RIVER. DEPOSIT IS PROBABLY IN HILLS THROUGH WHICH THIS STREAM DRAINS BASED ON DESCRIPTIONS IN LOGAN. INFO FROM LAND.ST :01?
Comment (Deposit): DEPOSIT IS SAID TO BE A DOWNSTREAM EQUIVALENT OF MENDOCINO MINING AND MILLING PROPERTY (M045326), EMPLACED DURING A TIME WHEN THE ANCESTRAL RUSSIAN RIVER FLOWED NORTH
Comment (Workings): HAND MINING
Comment (Geology): MODERN PLACER DEPOSITS ARE IN GULCH EMPTYING EASTWARD INTO RIVER FROM GRAVEL HILLS SOUTH OF CALPELLA
Comment (Deposit): RECORD M010033 HAS BEEN MERGED AND DELETED. SEE ALSO: MRDS M045326.
Comment (Production): SPENCER FOUND NO PGE BUT CONFIRMED PRODUCTION OF SEVERAL MILLIGRAMS.
References
Reference (Deposit): LOGAN, C.A., 1919, PLATINUM AND ALLIED METALS IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 85, P. 46-47.
Reference (Deposit): SPENCER, C.H., JR., 1971, STATISTICAL CORRELATION OF PLATINUM METALS WITH HEAVY MINERALS IN STREAM SEDIMENTS OF THE KLAMATH MOUNTAINS, CALIFORNIA: SAN JOSE, CALIFORNIA STATE UNIVERSITY, M.S. THESIS, P. 32.
California Gold
"Where to Find Gold in California" 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 California. Read more: Where to Find Gold in California.
