The Holst-Weeks Prospect is a mine located in Sonoma county, California.
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
Holst-Weeks Prospect MRDS details
Site Name
Primary: Holst-Weeks Prospect
Secondary: Holst
Secondary: Weeks
Commodity
Tertiary: Manganese
Location
State: California
County: Sonoma
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: ASSAY 39.7 PERCENT SILICA, 2.0 PERCENT IRON OXIDES, 31.4 PERCENT MANESE.
Materials
Not available
Comments
Comment (Location): LOCATED IN N. CENTER SECTION 1
Comment (Geology): GEOL.DESC: 5 TO 7 FT. THICK MASS OF METAMORPHOSED CHERT IS MOSTLY BRIGHT YELLOW, AND ALTERS TO EARTHY LIMONITIC MATERIAL. WITHIN THE CHERT ARE IRREGULAR MASSES OF RESINOUS, BROWN TO RED AND DULL BUFF MATERIAL EVIDENTLY A RESULT OF METAMORPHISM OF MANGANIFEROUS OPAL AND SILICEOUS CARBONATE. GREENSTONE IS FOUND 10 YARDS AWAY, IN PLACE. BLACK MANGANESE OXIDES ARE FOUND IN JOINTS IN MANGANESE BEARING MATERIAL.
References
Reference (Deposit): D.O.M. BULL. 152 1950 P. 284
Reference (Deposit): D.O.M. BULL. 125 1943 P. 187
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.
