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Crater Mountain

Prospect in Park county in Wyoming, United States with commodities Copper, Molybdenum, Silver, Lead, Zinc, Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Reserves and resources
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10400361
Record type Deposit
Current site name Crater Mountain
Alternate or previous names Needle Creek Porphyry

Geographic coordinates

Geographic coordinates: -109.6381, 44.0318 (WGS84)

Site location context

Political divisions (FIPS codes)

Park(county)

Wyoming(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fall Creek(quadrangle 1:24,000 scale)

Carter Mountain(quadrangle 1:100,000 scale)

Cody(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Shoshone(hydrologic unit)

Big Horn(hydrologic accounting unit)

Big Horn(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Shoshone National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Washakie Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Wyoming Park

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Silver Secondary
Lead Secondary
Zinc Critical Secondary
Gold Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Galena Ore
Sphalerite Ore
Tetrahedrite Ore
Arsenopyrite Ore
Biotite Gangue
Calcite Gangue
Dolomite Gangue
Epidote Gangue
Muscovite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) POTASSIC (SECONDARY BIOTITE), PHYLLIC THEN PROPYLITIC

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Rock type qualifier fine-to medium-grained light-to dark-gray phaneritic rocks ranging in composition from diorite to granodiorite.
    Rock unit name Needle Mountain Granodiorite
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Rock type qualifier porphyritic light-to medium-gray rhyodacite and dacite
    Rock unit name Crater Mountain Dacite
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock type qualifier andesitic to dacite in composition and porphyritic andesite to rhyodacite
    Rock unit name dikes
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (oldest) Eocene

Nearby scientific data

(1) -109.6381, 44.0318
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name NORTHEAST AND NORTHWEST FRACTURES

Ore body information

  • General form HYDROTHERMAL STOCK, DISSEMINATED; HYDROTHERMAL VEIN; SUPERGENE ENRICHMENT
    Length 1524M
    Width 1066.8M

Controls for ore emplacement

  • INTERSECTION NW-NE FRACTURE CONTROLLED INTRUSIVE CENTER

Comments on the geologic information

  • The following is from Fisher, 1972:
    In the Stinkingwater region at least three periods of Tertiary intrusive emplacement took place. Intrusive rocks all cut the layered rock of the region and include two stocks named the Needle Mountain Granodiorite and the Crater Mountain Dacite, and numerous dikes and some sills.
    The Needle Mountain Granodiorite, the oldest and largest, intrudes the Trout Peak Trachyandesite and the Wiggins Formation. It is well exposed on both Needle and Crater Mountains. The stock is composed primarily of fine-to medium-grained light-to dark-gray phaneritic rocks ranging in composition from diorite to granodiorite.
    The Crater Mountain Dacite is exposed in two seperate stocks, on Needle and Crater Mountains. Both stocks have been emplaced largely within the Needle Mountain Granodiorite. These stocks are porphyritic light-to medium-gray rhyodacite and dacite.
    Many dikes that are related to the Needle Mountain Granodiorite, form a radial pattern around it. Most of these dikes are andesitic to dacite in composition. Other dikes in the area which may be related to the Crater Mountain Dacite are most random and range from porphyritic andesite to rhyodacite. A third group, crosscut all other intrusive units, and are mainly hornblende andesite and pyroxine andesite.

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Significant Yes
Discovery year 1893

Mining district

District name Stinkingwater

Reserves and resources

  • Type In-situ
    Estimate year 1982
    Total resources 65000000mt ore
    Remarks drilling results from Timberline Minerals, Inc.
    Commodity Subtype Grade units Group Importance Year
    Copper 0.35 wt-pct Copper Primary 1982
  • Type In-situ
    Estimate year 1980
    Total resources 61000000mt ore
    Remarks drilling results from Bear Creek Mining Co. Newkirk (1980)
    Commodity Subtype Grade units Group Importance Year
    Copper 0.31 wt-pct Copper Primary 1980
  • Type In-situ
    Estimate year 1969
    Total resources 96378267mt ore
    Remarks Phelps Dodge drilling results
    Commodity Subtype Grade units Group Importance Year
    Copper 0.35 wt-pct Copper Primary 1969

Comments on the workings information

  • NUMEROUS PROSPECT ADITS SHAFTS ON VEIN DEPOSITS

Reference information

Bibliographic references

  • Deposit

    FISHER, F.S., 1972, USGS BULLETIN 1332-C

  • Geology

    Hausel, W. D., 1997, Copper, Lead, Zinc, Molybdenum, and Associated Metal Deposits of Wyoming: Wyoming State Geological Survey, Bull 70, 229 p.

  • Deposit

    Lukanuski, J.N., 1969, Progress report on the Needle Creek property, Park County, Wyoming: Phelps Dodge Corporation report, Geological Survey of Wyoming mineral files. 62 p.

  • Deposit

    Hausel, W. Dan, Miller, David R., Sutherland, Wayne M., 2000, Economic Diversification Through Mineral Resources, in Classical Wyoming Geology in the New Millennium; 51st Field Conference Guidebook, 2000 Pages 209-225.

General comments

Subject category Comment text
Deposit DISSEMINATED PORPHYRY STYLE MINERALIZATION IS SURROUNDED BY QUARTZ VEIN AND SHEAR ZONE HOSTED CU-PB-ZN-AG DEPOSITS. VEINS ARE USUALLY 1-2 IN BUT MAY BE UP TO 1 FT THICK. CLASSIC PORPHYRY ZONING WITH POTASSIC (SECONDARY BIOTITE) SURROUNDED BY PHYLLIC THEN PROPYLITIC ALTERATION.

DISSEMINATED MINERALIZATION IN PORPHYITIC NEEDLE MOUNTAIN GRANODIORITE SURROUNDED BY VEINS AT PERIPHRY. POTASSIC ZONE PATCHY IN THE DISSEMINATED ZONE. WELL DEVELOPED RADIAL DACITE DIKES

Reporter information

Type Date Name Affiliation Comment
Reporter 20-MAY-10 W. D. Heran U.S. Geological Survey

Beyond USGS

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

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