The Madrid Mine True Blue is a chromium mine located in Calaveras 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.
Madrid Mine True Blue MRDS details
Site Name
Primary: Madrid Mine True Blue
Commodity
Primary: Chromium
Location
State: California
County: Calaveras
District: Murphy Area
Land Status
Land ownership: Private
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.
Holdings
Not available
Workings
Not available
Ownership
Owner Name: M. S. Shepard
Home Office: C/O S. Murphy, San Mateo, Ca.
Years: 1975 -
Owner Name: Genochio, A.
Years: 1943 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chromite
Comments
Comment (Production): 1039 LONG TONS OF 30% CHROMIC OXIDE. IDLE SINCE 1943.
Comment (Workings): OPEN PIT AND INCLINED SHAFT. CONSIDERABLE ORE SAID TO REMAIN IN THE BOTTOM OF THE WORKINGS.
Comment (Geology): GEOL.DESC: IRREGULAR, BROKEN LENS OF NEARLY MASSIVE AND MEDIUM-GRADE DISSEMINATED CHROMITE, STRIKE N. 80 DEG. W., DIP 65 DEG. SW; MAXIMUM THICKNESS OF 12'; COUNTRY ROCK IS A SCHISTOSE, ALTERED SERPENTINE. SAID TO BE SOME ASBESTOS IN SEC. 2 (CDM BULL. 195)
References
Reference (Deposit): CALIF. B. 134, PT. III, CH. 2, P. 56-57 AND PL. 5
Reference (Deposit): CALIF. B. 76, P. 123; REPT. 21, P. 165; SP. REPT. 40, P. 21 AND PL. 1 AND 2; CALIF. COUNTY REPT. NO. 2, P. 22, 129 AND PL. D
Reference (Deposit): USGS MAP GQ-222; CDM BULL. 195, P. 18
Reference (Deposit): STINSON, M.C., 1975, CDMG MINERAL PROP. REPT., UNBB.
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.
