The Chocolate Drop Group is a manganese mine located in Imperial 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
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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.
Chocolate Drop Group MRDS details
Site Name
Primary: Chocolate Drop Group
Secondary: Big Bear
Secondary: Black Jack
Secondary: Black Queen: Ebony Group.
Commodity
Primary: Manganese
Location
State: California
County: Imperial
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Psilomelane
Gangue: Calcite
Comments
Comment (Commodity): ECONOMIC POSSIBILITIES NOT PROMISING BECAUSE OF LOW AVERAGE GRADE OF ORE.
Comment (Location): GROUP COMPRISES 4 CLAIMS; CHOCOLATE DROP, BLACK QUEEN, BLACK JACK, AND BIG BEAR. THE EBONY GROUP IS THE OLD NAME FOR THE DEPOSITS.; LATITUDE-LONGITUDE VALUES CALCULATED FROM TOWNSHIP, RANGE, SECTION.
Comment (Geology): GEOL.DESC: THE GROUP CONSISTS OF FISSURE DEPOSITS OF MANGANESE OXIDES (MAINLY HARD, BOTRYOIDAL PSILOMELANE) OCCURRING IN TERTIARY FANGLOMERATE AND, IN ONE PLACE (BLACK JACK) IN ANDESITE. THE FISSURES OCCUR OVER AN AREA HALF A MILE WIDE, STRIKE CLOSE TO NORTH, AND ARE VERTICAL OR STEEPLY DIPPING. BRECCIATED ZONES ALONG THE FISSURES ARE CEMENTED WITH AND PARTIALLY REPLACED BY MANGANESE OXIDE. VEINLETS OF MANGANESE OXIDE AND OF LATER CALCITE CUT FISSURE ZONES. ALTERNATE BANDS OF SOFT BLACK CRYSTALLINE OXIDE ARE PYROLUSITE OR POSSIBLY MANGANITE. THE BLACK JACK CLAIM OCCURS IN ANDESITE WHICH UNDERLIES THE FANGLOMERATE OF THE CHOCOLATE DROP AND BIG BEAR CLAIMS.
References
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 75 - 76
Reference (Deposit): D.O.M. BULL. 125 1943 P. 118
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.
