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Unnamed (northeast of the head of Quartz Creek)

Occurrence in Alaska, United States with commodities Gold, Silver, Lead, Zinc
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Geologic information

Identification information

Deposit ID 10307481
Record type Site
Current site name Unnamed (northeast of the head of Quartz Creek)

Geographic coordinates

Geographic coordinates: -144.02263, 62.79968 (WGS84)
Relative position This occurrence is an altered-sulfidized area more than one-mile long and about one-quarter mile across. It trends east-northeast across the ridge that divides Ahtell and Porcupine Creeks, northeast of the head of Quartz Creek. The center of the area is about 1,000 feet west of the center of section 24, T. 12 N., R. 7 E., Copper River Meridian.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Zinc Secondary

Comments on the commodity information

  • Gangue = Carbonate minerals

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Silicification; formation of silica-carbonate rock in intermediate volcanics; local sulfidation.

Nearby scientific data

(1) -144.02263, 62.79968
ListMap

Comments on the geologic information

  • Geologic Description = The country rocks are mainly Pennsylvanian to Permian volcanic rocks with lesser sedimentary rocks (Richter, 1966; Richter and Matson, 1968). They have been silicified, converted to silica-carbonate rocks, and locally sulfidized along a east-northeast to northeast trending zone more than one mile long (WGM Inc., 1980). A soil sample collected in approximately the center of the zone contained more than 500 ppb gold. Rock samples collected from the altered zone locally contained more than 2,000 ppb gold, 20 ppm silver, and 5,000 ppm lead and zinc (Bull, Freeman, and Schneider, 1999).
  • Age = Possibly related to a nearby Jurassic diorite intrusion.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = Only reconnaissance mapping and sampling of natural exposures.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF GU022

Bibliographic references

  • Deposit

    Richter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 2l, 36b p., 3 sheets, scale 1:63,360.

  • Deposit

    Richter, D.H., and Matson, N.A., 1968, Distribution of gold and some base metals in the Slana area, eastern Alaska Range, Alaska: U.S. Geological Survey Circular 593, 20 p.

  • Deposit

    WGM Inc., 1980, 1979 Summary report of gold potential, Slana District, Ahtna project: WGM Inc., 10 p., 1:63,360-scale map. (Report held by Ahtna Mineral Co., Anchorage, Alaska).

  • Deposit

    Bull, Katharine, Freeman, Larry, and Schneider, Craig, 1999, Slana property summary report for Homestake Mining Company: 11 p. and analytical appendices. (Report available, Ahtna Minerals Co., Anchorage, Alaska).

Comments on the references

  • Primary Reference = WGM Inc., 1980, and Bull, Freeman and Schneider, 1999

General comments

Subject category Comment text
Deposit Model Name = Gold porphyry
Deposit Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Reporter information

Type Date Name Affiliation Comment
Reporter 08-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 08-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 08-DEC-00 W.J. Nokleberg U.S. Geological Survey