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Salt Rock

Occurrence in Josephine county in Oregon, United States with commodities Chromium, Palladium, Rhodium, Platinum, Iridium, Ruthenium
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10042774
MRDS ID M060792
Record type Site
Current site name Salt Rock
Related records 10201886

Geographic coordinates

Geographic coordinates: -123.56422, 42.47093 (WGS84)
Elevation 878
Relative position 3 MI NORTHEAST OF ONION MOUNTAIN

Site location context

Political divisions (FIPS codes)

Josephine(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Onion Mountain(quadrangle 1:24,000 scale)

Grants Pass(quadrangle 1:100,000 scale)

Medford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Rogue(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 036S 007W 06 SE4 OF NE4 Oregon

Comments on the location information

  • LOCATION GIVEN IS FOR PGE SAMPLE SITE LOCATION. TOPO MAP DOES NOT SHOW ANY PROSPECTS IN THE AREA

Commodities

Commodity Importance
Chromium Critical Primary
Palladium Critical Tertiary
Rhodium Critical Tertiary
Platinum Critical Tertiary
Iridium Critical Tertiary
Ruthenium Critical Tertiary

Materials information

Materials Type of material
Chromite Ore
Serpentine Gangue

Alteration

  • (Local) Serpentinization

Analytical data

Result 56.04% CR2O3, 11.70% FE
Result 1 PGE ANALYSIS: PT=850 PPB
Result PD=4 PPB
Result IR=900 PPB
Result RU=1,600 PPB
Result RH=91 PPB.

Mineral occurrence model information

Model code 15
USGS model code 8a
Deposit model name Podiform chromite (minor)
Mark3 model number none

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Pearsoll Peak Ophiolite
    Rock description Pearsoll Peak Ophiolite

Nearby scientific data

(1) -123.56422, 42.47093
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Northeast-Trending Shear Zone

Ore body information

  • General form LENS, PODS
    Strike NE
    Dip SE
    Length 0.61M
    Width 0.3M

Controls for ore emplacement

  • Magmatic Segregation

Comments on the geologic information

  • SERPENTINE COUNTRY ROCK

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discoverer John E. Hamlin

Land status

Ownership category National Forest
Area name Siskiyou National Forest

Ownership information

  • Type Owner
    Owner Arnot, Pat
    First year 1951

Production statistics

  • Year 1952
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^51% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Cr2O3 Chromium Chromium 51wt-pct
  • Year 1957
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^45% Cr2o3, 2.7 Cr:Fe
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Cr2O3 Chromium Chromium 45wt-pct

Comments on the production information

  • 25 TONS PRODUCED BEFORE SOMETIME IN 1951. PRODUCED UP TO 1958

Comments on the workings information

  • SMALL CUTS

Comments on development

  • 3 UNPATENTED CLAIMS IN 1951

Reference information

Bibliographic references

  • Deposit

    RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 52, P. 132.

  • Deposit

    THAYER, T.P., 1974, U.S. GEOLOGICAL SURVEY, UNPUB. DATA.

  • Deposit

    PAGE, N.J, JOHNSON, M.G., HAFFTY, JOSEPH, AND RAMP, LEN, 1975, OCCURRENCE OF PLATINUM GROUP METALS IN ULTRAMAFIC ROCKS OF THE MEDFORD-COOS BAY 2 DEGREE QUADRANGLE, SOUTHWESTERN OREGON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-694, SCALE 1:250,000.

  • Deposit

    RAMP, LEN, AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 100, TABLE 1.

  • 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.

  • Production

    RAMP, 1961, ESTIMATE OF 80 TONS; THAYER FILES INCOMPLETE

General comments

Subject category Comment text
Deposit VERY SMALL SIZE; DISCONNECTED, ALONG FAULT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Johnson, Maureen G. U.S. Geological Survey
Updater 01-APR-1981 Ferns, Mark L. (Brooks, Howard C.) Oregon Department of Geology and Mineral Industries
Updater 01-MAY-1989 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

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

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