Ammann Prospect

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10000864
MRDS ID A011517
Record type Site
Current site name Ammann Prospect

Geographic coordinates

Geographic coordinates: -144.06865, 61.67548 (WGS84)
Location accuracy 2000(meters)
Relative position ON DIVIDE BETWEEN COPPER CREEK AND SMALL TRIB. FROM SW
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • BEST LOCATION: USGS BULL 947, PLATE 30, LOC. 1; PLOTTED JUST W OF MULLEN PROSPECT. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Covellite Ore
Malachite Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Analytical data

Result NO DATA

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Chitistone Limestone;Nikolai Greenstone
    Rock description Chitistone Limestone;Nikolai Greenstone

Nearby scientific data

(1) -144.06865, 61.67548

Geologic structures

Type of structure Local
Structure description Main Adit Is On Nose Of Small Anticline In Limestone

Ore body information

  • Strike E-W}
    Dip 45 S}
    Thickness 0.01M
    Width 0.15M

Comments on the geologic information

  • GEOL.COM: DEPOSIT NEAR LIMESTONE-GREENSTONE CONTACT

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Workings at the site

  • Type of workings Underground
    Length 184.4M

Comments on the workings information

  • EXPLORED BY TWO ADITS; UPPER ADIT DRIVEN S 5 E FOR 25 FT, LOWER ADIT DRIVEN S 32 W FOR 473 FT, THEN S 17 E FOR 111 FT; PRESENT CONDITIONSUNKNOWN

Comments on development

  • PROSPECTING DID NOT REVEAL AN ORE BODY

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011517

Bibliographic references

  • Deposit

    USGS BULL 947-G, P. 125-126

  • Deposit

    USGS MF-438, LOC. 70

  • Deposit

    USGS OFR 80-892B, LOC. 57

  • Other Database

    BAG-OFR-80-892B-57

General comments

Subject category Comment text
Deposit SEE ALSO: MULLEN, PEACOCK, CAVE ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Deposit SHEAR ZONE 2 TO 6 IN WIDE MINERALIZED WITH PYRITE, BORNITE, CHALCOPYRITE, CHALCOCITE, COVELLITE, MALACHITE AND AZURITE; LIMESTONE COUNTRYROCK CUT BY DISCONTINUOUS MALACHITE-AZURITE-CALCITE VEINS UP TO 1/4 IN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1985 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 14-APR-1995 Waller, Nichelle (Mosier, Dan) U.S. Geological Survey PUT DIMENSION DATA INTO THE ORE BODY AND WORKINGS FIELDS FROM THE COMMENTS FIELD