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Bobcat Gulch Prospect

Prospect in Lemhi county in Idaho, United States with commodities Copper, Molybdenum, Gold
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10096858
MRDS ID D011328
MAS/MILS ID 0160590865
Record type Deposit
Current site name Bobcat Gulch Prospect
Alternate or previous names Napolean Ridge

Geographic coordinates

Geographic coordinates: -113.99452, 45.35629 (WGS84)
Elevation 1902
Location accuracy 1000(meters)
Relative position 4.0 MI 55E OF NORTH FORK

Site location context

Political divisions (FIPS codes)

Lemhi(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bird Creek(quadrangle 1:24,000 scale)

Salmon(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Salmon-Panther(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Salmon-Challis 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 Idaho Lemhi

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 023N 021E 04, 05 Idaho

Comments on the location information

  • HEADWATERS OF BOBCAT GULCH ; INFO FROM LAND.ST :1978

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Gold Tertiary

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Molybdenite Ore
Gold Ore
Pyrite Gangue

Mineral occurrence model information

Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Bobcat Gulch Pluton;Granodiorite
    Rock description Bobcat Gulch Pluton;Granodiorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Yellowjacket Formation
    Rock description Yellowjacket

Nearby scientific data

(1) -113.99452, 45.35629
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Cannivan-White Cloud Mo Belt

Comments on the geologic information

  • 2 CENTERS OF INTRUSION AND MINERALIZATION. MO-RICH AREA ASSOCIATED WITH MORE SILICIC ROCKS.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1977

Comments on exploration

  • Drilling 1979-1981 indicated two distinct porphyry copper stocks The majority of work centered on a the eastern stock, on which a resource of 60,000,000 tons of .5% Cu was reported. Exploration of the western stock has identified a chalcocite enrichment zone that encompasses an area of at least 2,500 by 4,500 ft. BHP Minerals was exploring the property in 1994 an believed it has potential mostly for gold. The property adjoins on the northeast the Beartrack deposit with reserves of 36.9 million tons averaging .055 opt gold

Mining district

District name Eureka District

Land status

Ownership category National Forest
Area name Salmon National Forest

Ownership information

  • Type Owner
    Owner Cominco American, Inc.
    Home office Garrison, Mt. 59731

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Total resources 54000000mt ore
    Remarks Drilling estimate of eastern stock. \nUSGS OFR 2004-1038.
    Commodity Subtype Grade units Group Importance Year
    Copper 0.5 wt-pct Copper Primary 1981

Comments on development

  • 5 DRILL HOLES TOTALLING 5549 FT (1981)

Reference information

Bibliographic references

  • Deposit

    BUNNING AND BURNET, 1981 CU-MO MINERALIZATION IN THE BOBCAT GULCH PORPHYRY SYSTEM, LEMHI CO, ID: NW MINING CONVENTION PAPER, II P.

  • Deposit

    PETERS, D.W., 1980, FOREST SERVICE FILES, SALMON IDAHO.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1984 Loen, Jeffrey S. (Pearson, Robert C.) U.S. Geological Survey
Reporter 17-DEC-1987 Lowe, Nathan T. U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site