Brandon

The Brandon is a chromium mine located in El Dorado county, California at an elevation of 719 feet.

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

Name: Brandon  

State:  California

County:  El Dorado

Elevation: 719 Feet (219 Meters)

Commodity: Chromium

Lat, Long: 38.56583, -120.93417

Map: View on Google Maps

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.


Satelite image of the Brandon

Brandon MRDS details

Site Name

Primary: Brandon


Commodity

Primary: Chromium
Tertiary: Platinum
Tertiary: Palladium
Tertiary: Iridium
Tertiary: Ruthenium
Tertiary: Rhodium


Location

State: California
County: El Dorado


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Owner Name: Robert D. Domecq, Et Al.


Production

Year: 1918
Material type: ORE
Description: Ap_Grade: ^45% Cr2o3


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1918
Year Last Production: 1918
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada


Mineral Deposit Model

Model Name: Podiform chromite (minor)


Orebody

Form: PODS


Structure

Type: L
Description: Shearing


Alterations

Alteration Type: L
Alteration Text: Ultramafic Rocks Are Serpentinized


Rocks

Name: Peridotite
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic

Name: Peridotite
Role: Associated
Age Type: Associated Rock
Age Young: Late Jurassic

Name: Peridotite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Jurassic


Analytical Data

Analytical Data: RH=7 PPB.
Analytical Data: RU=230 PPB
Analytical Data: IR=200 PPB
Analytical Data: PD=186 PPB
Analytical Data: 1 PGE ANALYSIS: PT=130 PPB


Materials

Ore: Chromite


Comments

Comment (Workings): 3 OPEN CUTS, 10-25 FT LONG.

Comment (Location): ON RIDGE BETWEEN HUNGRY HOLLOW AND INDIAN CREEKS. NO MINE SHOWN ON TOPO MAP; LOCATION GIVEN IS FOR PGE SAMPLE SITE LOCATION

Comment (Development): OPERATED BY BRANDON BROTHERS DURING WWI

Comment (Deposit): CONTACT OF CHROMITE PODS AND DUNITE IS SHEARED

Comment (Production): 4 CARLOADS WERE PRODUCED IN 1918. MINE HAS BEEN IDLE SINCE THEN AND WORKINGS ARE CAVED. A SMALL AMOUNT OF CHROMITE REMAINS IN DEEPEST PIT


References

Reference (Deposit): CLARK, W.B., AND CARLSON, D.W., 1956, MINES AND MINERAL RESOURCES OF EL DORADO COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY V. 52, NO. 4, P. 465.

Reference (Deposit): LINDGREN, WALDEMAR, 1894, SACRAMENTO FOLIO, CALIFORNIA: U.S. GEOLOGICAL SURVEY GEOLOGIC ATLAS OF THE UNITED STATES, FOLIO 5, SCALE 1:125,000.

Reference (Deposit): BRADLEY, W.W., HUGUENIN, EMILE, LOGAN, C.A., TUCKER, W.B., AND WARING, C.A., 1918, MANGANESE AND CHROMIUM IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 76, P. 132.

Reference (Deposit): CATER, F.W., JR., RYNEARSON, G.A., AND DOW, D.H., 1951, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 3, CH. 4, P. 122-123, 164, PL. 8.

Reference (Deposit): CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.


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