The Mazza Mazza Ranch is a mine located in Marin 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.
Mazza Mazza Ranch MRDS details
Site Name
Primary: Mazza Mazza Ranch
Commodity
Tertiary: Manganese
Location
State: California
County: Marin
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Francis A. Mazza
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Discovery Year: 1915
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
Not available
Materials
Gangue: Pyrite
Gangue: Cinnabar
Comments
Comment (Location): LOCATED IN SW 1/4 SECTION 28; LATITUDE-LONGITUDE VALUES CALCULATED FROM TOWNSHIP, RANGE, SECTION.
Comment (Production): DEVELOPED BY M. VONSEN DURING WWI BUT NO SHIPMENTS WERE MADE. IDLE AND PIT IS NEARLY FILLED WITH MATERIAL BULLDOZED FROM A NEARBY TRAIL.
Comment (Workings): PIT ABOUT 30 FT. IN DIAMETER.
Comment (Geology): GEOL.DESC: ORE BODY LIES PARALLEL TO ENCLOSING CHERT, STRIKES N 25 E, DIPPING 60 SE. THE HANGING WALL IS SOFT BROWN IRON STAINED CHERT AND THE FOOTWALL IS COVERED BY ALLUVIUM. THE ORE BODY IS 15 FT. THICK, AND IS GRAY AND PINK CARBONATE WITH A PROGRESSIVE SILICA CONTENT TOWARD THE FOOTWALL. QUARTZ VEINS CUT THE ORE, AND MASSES OF PYRITE AND SPECKS OF CINNABAR ARE PRESENT. A SMALL AMOUNT OF OXIDE IS FOUND ALONG HANGING WALL.
Comment (Deposit): THE PROPORTION OF SILICA IS SO HIGH THAT THE PRODUCTION OF MANGANESE ORE SEEMS UNLIKELY.
Comment (Deposit): Discovery Year: WWI
References
Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 51, NO. 3, JULY 1955, P. 262, 282, PL. 4
Reference (Deposit): DOM BULL. 125, P. 131
Reference (Deposit): D.O.M. BULL. 152 1950 P. 106
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.
