1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

O'Brien Mine

Occurrence in Granite county in Montana, United States with commodities Silver, Gold, Lead, Chromium, Antimony
Map
XML
JSON
KML
B
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. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10013232
MRDS ID D009419
Record type Site
Current site name O'Brien Mine
Alternate or previous names Hidden Lead

Geographic coordinates

Geographic coordinates: -113.66064, 46.00461 (WGS84)
Relative position 6.0 KM E OF FISH LAKE.

Site location context

Political divisions (FIPS codes)

Granite(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Whetstone Ridge(quadrangle 1:24,000 scale)

Philipsburg(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Flint-Rock(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Beaverhead-Deerlodge 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 Granite

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 003N 017W 13 Montana

Comments on the location information

  • 5.5 KM SSW OF GREEN CANYON LAKE. ON HILL SE OF FROG POND BASIN. ; INFO FROM LAND.ST :(1978)

Commodities

Commodity Importance
Silver Primary
Gold Primary
Lead Secondary
Chromium Critical Tertiary
Antimony Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Idaho Batholith
    Rock description Idaho Batholith
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock
    Rock unit name Belt Group
    Rock description Belt Group

Nearby scientific data

(1) -113.66064, 46.00461
ListMap

Economic information

Ore body information

  • Strike N 40 E
    Dip 83 NW

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1925
Discoverer Tim O'Brien

Mining district

District name Frog Pond Basin District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner F. H. Burton

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 161.7 g/mt Silver Major 1979
    Gold Au 0.311 g/mt Gold Major 1979
  • Type Tailings
    Estimate year 1979
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 21.7 g/mt Silver Major 1979
    Gold Au 0.311 g/mt Gold Major 1979

Workings at the site

  • Type of workings Surface/Underground
    Length 91.44M
    Overall depth 7.62M

Comments on the workings information

  • 3 LOCATIONS: MAIN O'BRIEN HAS A CAVED SHAFT, 50-60 FT DEEP AND 2 CAVED ADITS; O'BRIEN WEST HAS 7 PITS, 1 TRENCH CAVED ADIT, 2 CAVED SHAFTS; O'BRIEN NW HAS 15 PITS, 2 TRENCHES CAVED ADIT, AND A 20 FT SHAFT.

Reference information

Bibliographic references

  • Deposit

    FS FIELD REPORT

General comments

Subject category Comment text
Deposit VEIN CONTAINS BOXWORK STRUCTURES, DRUSY QUARTZ, EPIDOTE, SOME METALLIC BANDING.
Deposit DISTURBED AREA 0.5 ACRES ; INFO.SRC : 3 FIELD OBSERV

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1982 Bishop, Blaskowski, Michael J. (Elliott, James E.) U.S. Geological Survey
Updater 01-JAN-1982 Wise, Kristine K. (Elliott, James E.) U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site