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Black Otter Claim

Producer in Josephine county in Oregon, United States with commodity Chromium
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Geologic information

Identification information

Deposit ID 10043113
MRDS ID M061610
Record type Site
Current site name Black Otter Claim
Related records 10249721

Geographic coordinates

Geographic coordinates: -123.77949, 42.33204 (WGS84)
Elevation 335
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Geographic areas

Country State County
United States Oregon Josephine

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 037S 009W 20 Oregon

Commodities

Commodity Importance
Chromium Primary

Materials information

Materials Type of material
Chromite Ore
Actinolite Gangue
Antigorite Gangue
Talc Gangue

Analytical data

Result CHROMITE LAYER - LOWER GRADE - ASSAYED 37% CR2O3, 12% FE, NEARLY 9% SIO2
Result MORE MASSIVE CHROMITE ASSAYED 44.9% CR2O3, 14.3% FE.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Josephine Peridotite
    Rock description Josephine Peridotite

Nearby scientific data

(1) -123.77949, 42.33204
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Geologic structures

Type of structure Local
Structure description Shearing, Landslide

Ore body information

  • General form LENS, LAYER
    Strike N 30 E
    Dip 45 SE

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1954

Mining district

District name Illinois River

Land status

Ownership category National Forest
Area name Siskiyou National Forest

Production statistics

  • Year 1954
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^52. % Cr2o3, 11.3 % Fe
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 52wt-pct
    Ore Iron Iron 11wt-pct

Comments on the production information

  • MOSTLY FROM SLIDE AREA IN SHEAR ZONE

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M061610
U.S. Bureau of Mines Minerals Availability System MAS 0410330485

Bibliographic references

  • Deposit

    RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPT. GEOLOGY AND MINERAL IND. BULL. 52, 169 P.

  • Deposit

    RAMP, L. AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON; ODGMI BULL. 100, 45P

General comments

Subject category Comment text
Deposit 2 OCCURRENCES - SLIDE & LAYER
Deposit RECORD NUMBER (M015261) HAS BEEN MERGED WITH THIS RECORD AND DELETED FROM THE OREGON FILE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1978 Unknown U.S. Geological Survey
Updater 01-FEB-1981 Ferns, Mark L. (Brooks, Howard C.) U.S. Geological Survey
Updater 01-AUG-1993 Gray, Jerry J. Oregon Department of Geology and Mineral Industries