Unnamed (near Dartmouth Glacier)

Occurrence in Alaska, United States with commodities Silver, Arsenic, Gold

Geologic information

Identification information

Deposit ID 10003438
MRDS ID A106195
Record type Site
Current site name Unnamed (near Dartmouth Glacier)

Geographic coordinates

Geographic coordinates: -147.66259, 61.16957 (WGS84)
Relative position On slope 1 mile north-northeast from terminus of Dartmouth Glacier. Accurate within 3,000 ft. Locality A-16 of Jansons and others (1984).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Arsenic Primary
Gold Primary

Materials information

Materials Type of material
Arsenopyrite Ore
Galena Ore
Pyrite Ore
Quartz Gangue

Mineral occurrence model information

Model code 274
USGS model code 36a.1
Deposit model name Low-sulfide Au-quartz vein, Chugach-type
Mark3 model number 26

Nearby scientific data

(1) -147.66259, 61.16957

Comments on the geologic information

  • Geologic Description = Jansons and others (1984) reported several sub-parallel quartz veins in shear zones in and along margin of a small granitic stock. The veins are 2 to 12 inches wide and contain disseminated grains and massive pods of arsenopyrite and lesser disseminated galena and pyrite. The granitic stock intrudes metasedimentary rocks of the Late Cretaceous Valdez Group. ? Three chip samples averaged 0.15 oz/ton Au and 0.37 oz/ton Ag. Three grab samples contained traces of gold and up to 0.03 oz/ton Ag (Jansons and others, 1984).
  • Age = Late Cretaceous or younger; shear zones and veins cut a small granitic stock which intrudes metasedimentary rocks of the Late Cretaceous Valdez Group.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Prince William Sound

Comments on the workings information

  • Workings / Exploration = Three chip samples averaged 0.15 oz/ton Au and 0.37 oz/ton Ag. Three grab samples contained traces of gold and up to 0.03 oz/ton Ag. This location has moderate mineral development potential (Jansons and others, 1984).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106195
USGS Alaska Resource Data File ARDF AN140

Bibliographic references

  • Deposit

    Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

Comments on the references

  • Primary Reference = Jansons and others, 1984

General comments

Subject category Comment text
Deposit Model Name = Chugach-type low-sulfide Au-quartz veins (Bliss, 1992; model 36a.1 ?) or Epithermal Au vein ?

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey
Reporter 30-JUL-1998 S.W. Huss U.S. Geological Survey