The Hearst Ranch - Marmelejo Creek Deposit is a manganese mine located in San Luis Obispo 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
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.
Hearst Ranch - Marmelejo Creek Deposit MRDS details
Site Name
Primary: Hearst Ranch - Marmelejo Creek Deposit
Commodity
Primary: Manganese
Location
State: California
County: San Luis Obispo
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: AVERAGE ABOUT 30 PERCENT MANGANESE
Materials
Ore: Rhodochrosite
Comments
Comment (Geology): GEOL.DESC: ORE OCCURS AS LARGE BOULDERS IN CREEK BOTTOM. ONLY ORE IN PLACE IS AT CONTACT OF THE SANDSTONE AND SERPENTINE, BUT LANDSLIDING HAS MADE RELATIONSHIPS OBSCURE. BOULDERS UP TO 15 FT. IN DIAMETER CONSIST OF MANGANESE OXIDE AND CALCITE, WITH MANY SMALL RHODOCHROSITE VEINS CUTTING THE ORE.
Comment (Deposit): ORE OCCURS AS LARGE BOULDERS IN CREEK BOTTOM. ONLY ORE IN PLACE IS AT CONTACT OF THE SANDSTONE AND SERPENTINE, BUT LANDSLIDING HAS MADE RELATIONSHIPS OBSCURE. BOULDERS UP TO 15 FT. IN DIAMETER CONSIST OF MANGANESE OXIDE AND CALCITE, WITH MANY SMALL RHODOCHROSITE VEINS CUTTING THE ORE.
Comment (Location): LOCATED IN S. CENTER OF SEC. 1; LATITUDE-LONGITUDE VALUES CALCULATED FROM TOWNSHIP, RANGE, SECTION.
References
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 230 - 231
Reference (Deposit): D.O.M. BULL. 125 1943 P. 168
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.
