Origin

Prospect in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10308152
Record type Site
Current site name Origin

Geographic coordinates

Geographic coordinates: -160.66741, 55.18923 (WGS84)
Relative position The map site of the Origin prospect is at an elevation of 400 feet, near the north end of the boundary between secs. 3 and 4, T. 58 S., R. 75 W., Seward Meridian. The location is accurate to within 1,200 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) The host rocks are silicified and propylitized.

Nearby scientific data

(1) -160.66741, 55.18923

Comments on the geologic information

  • Geologic Description = The Origin prospect consists of a knob of silicified and propylitized andesite on the trace of the Aquila linear (Peterson and others, 1982, figure 11). The andesite, which contains as much as 5 percent disseminated pyrite, is part of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). Trenches exposed a 70-foot-wide quartz-clay vein comprising 80 percent quartz and 20 percent clay. No trench sample of the vein contained more than 0.138 ppm gold, and most contained no detectable gold. Combined copper, lead, and zinc values ranged from 80 to 100 ppm. The samples contained as much as 500 ppm arsenic and 0.45 ppm mercury. One drill hole intersected a 25-foot zone averaging 0.171 ppm gold.
  • Age = Eocene or younger.

Economic information

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = During the period 1979 to 1982 Resource Associates of Alaska and UNC Teton Exploration Drilling Company mapped and sampled the prospect, drilled one 577-foot core hole, and cut four trenches for a total of 805 feet (Peterson and others, 1982). The 145 trench samples were essentially barren of base and precious metals. The drill hole intersected a 25-foot zone averaging 0.171 ppm gold.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PM087

Bibliographic references

  • Deposit

    Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Peterson and others, 1982

General comments

Subject category Comment text
Deposit Other Comments = This site is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-01 S.H. Pilcher U.S. Geological Survey