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Dart and Braden Capco Leases

Past Producer in Placer county in California, United States with commodity Chromium
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Geologic information

Identification information

Deposit ID 10043566
MRDS ID M100350
Record type Site
Current site name Dart and Braden Capco Leases
Alternate or previous names Claims: Port Wine, Horseshoe

Geographic coordinates

Geographic coordinates: -120.7777, 39.10239 (WGS84)
Location accuracy 1000(meters)
Relative position Assumed Spot Center Sw Of Ne, 31
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Geographic areas

Country State County
United States California Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 015N;015N 011E;011E 30;31 E2 (30); SW OF NE (31) California

Commodities

Commodity Importance
Chromium Primary

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Nearby scientific data

(1) -120.7777, 39.10239
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Ore body information

  • General form LENSE
  • General form LENSE

Comments on the geologic information

  • DEPOSIT OCCURS IN THE EASTERNMOST OF 3 SUBPARALLEL BELTS OF ULTRAMAFIC ROCKS THAT TREND NORTHWARD ACROSS THE COUNTY

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Forest Hill Divide Area

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Knudsen, R. N.
  • Type Owner
    Owner Drone, L. E., E. D. And J. W.

Production statistics

  • Year 1942
    Material CON CR
    Accuracy Accurate
    Description Ap_Grade: ^47.39% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 47wt-pct

Comments on the workings information

  • WORKINGS CONSISTED OF AN IRREGULAR OPEN CUT AND SEVERAL PITS.

Comments on development

  • A SMALL WASHING PLANT WAS OPERATED ON THE HORESESHOE CLAIM IN NE OF NE, SECT. 30.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M100350

Bibliographic references

  • Deposit

    RYNEARSON, G.A., 1953, CDMG BULL 134, PT. 3, CHAPT. 5, P. 200, 217, 308

  • Production

    CDMG BULL 134, PT. 3, CHAPT. 5, P. 200, 217.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-83 Oster, Karel L. (Albers, John P.) U.S. Geological Survey