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Dark Star

Producer in Josephine county in Oregon, United States with commodity Chromium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10109707
MRDS ID M061579
Record type Site
Current site name Dark Star
Related records 10201416

Geographic coordinates

Geographic coordinates: -123.81755, 42.3201 (WGS84)
Elevation 927

Site location context

Political divisions (FIPS codes)

Josephine(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pearsoll Peak(quadrangle 1:24,000 scale)

Grants Pass(quadrangle 1:100,000 scale)

Medford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Illinois(hydrologic unit)

Southern Oregon Coastal(hydrologic accounting unit)

Oregon-Washington Coastal(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Rogue River-Siskiyou National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Oregon Josephine

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 037S 010W 25 Oregon

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Serpentine Gangue
Talc Gangue

Analytical data

Result ASSAYS SHOW 48-50% CR2O3 WITH 11-13% FE

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite
    Rock unit name Josephine Peridotite
    Rock description Josephine Peridotite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic

Economic information

Geologic structures

Type of structure Local
Structure description Landslide - Ore Is Badly Scrambled

Ore body information

  • General form FLOAT
    Thickness 0.61M

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

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: ^49. % Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Cr2O3 Ore Chromium Chromium 49wt-pct

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    THAYER, T. P., 1974, UNPUBL. DATA

  • Deposit

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

General comments

Subject category Comment text
Deposit RECORD NUMBER (M015305) HAS BEEN MERGED WITH THIS RECORD AND DELETED FROM THE OREGON FILE.
Deposit LANDSLIDE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1977 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

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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