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Arsenic - Cobalt Occurrence

Occurrence in Sanders county in Montana, United States with commodities Arsenic, Cobalt, Copper
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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. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10091634
MRDS ID DC08385
Record type Site
Current site name Arsenic - Cobalt Occurrence

Geographic coordinates

Geographic coordinates: -114.78987, 47.3471 (WGS84)
Elevation 853
Relative position 3 MI S OF PARADISE

Site location context

Political divisions (FIPS codes)

Sanders(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Quinns Hot Springs(quadrangle 1:24,000 scale)

Plains(quadrangle 1:100,000 scale)

Wallace(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Clark Fork(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Lolo National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Montana Sanders

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 018N 025W 04 Montana

Comments on the location information

  • ON WEST BANK OF CLARK FORK RIVER

Commodities

Commodity Importance
Arsenic Critical Primary
Cobalt Critical Tertiary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrrhotite Ore
Pyrite Gangue
Quartzite Gangue

Analytical data

Result HIGH ARSENOPYRITE SAMPLE ASSAYED 16.55% AS AND 0.055% CO

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -114.78987, 47.3471
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Economic information

Geologic structures

Type of structure Local
Structure description Gabbro Occurs As A Sill.

Ore body information

  • General form POD/LENS
    Width 0.18M

Comments on the geologic information

  • ARSENOPYRITE IS EUHEDRAL AND IS SPARSELY SCATTERED THROUGHOUT THE SILL. VEINS OF QUARTZ CONTAINING PYRITE AND CHALCOPYRITE CUT THE ARSENOPYRITE ; GEOL.DESC: SELECTED SAMPLE, 16.55% AS, 0.055% CO

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Plains District

Land status

Ownership category National Forest

Comments on development

  • OCCURRENCE DOES NOT APPEAR TO HAVE MUCH ECONOMIC SIGNIFICANCE

Reference information

Bibliographic references

  • Analytical Data

    SRC.REF: CROWLEY, F. A., 1963 : MONTANA BUREAU OF MINES AND GEOLOGY BULL. 34 , P. 25 .

  • Deposit

    CROWLEY, F. A., 1963 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS) SANDERS COUNTY MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 34 , P. 24-25 .

  • Deposit

    CONSV. DIV. COMP. DATE, 06-13-1963

General comments

Subject category Comment text
Deposit DEPOSIT APPEARS TO BE ASSOCIATED WITH QUARTZ VEINS WITHIN THE GABBROIC SILL. MINERALIZATION IS MOST APPARENT NEAR THE PRICHARD-INTRUSIVE CONTACT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-APR-1979 Rojstaczer, Stuart 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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