Prospect in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10307669
Record type Site
Current site name Julian

Geographic coordinates

Geographic coordinates: -131.74176, 55.15974 (WGS84)
Relative position This prospect is known only from U.S. Bureau of Mines (1977) claim records. Its approximate location is at or near sea level, on the north side of the entrance to Dall Bay. The site is in section 29, T. 77 S., R. 91 E., of the Copper River Meridian. It corresponds to loc. 128 in Elliott and others (1978). The location probably is accurate within 0.3 mile.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary

Nearby scientific data

(1) -131.74176, 55.15974

Comments on the geologic information

  • Geologic Description = The country rocks in the area of this prospect consist of an assemblage of undivided Silurian or Ordovician metamorphosed bedded and intrusive rocks that are intruded by stocks and dikes of Silurian trondhjemite (Berg, 1973; Berg and others, 1988), the rocks are cut by a complex system of high-angle faults that mainly strike NE and NW. Locally, they also are permeated by finely disseminated hydrothermal hematite, giving them (especially the trondhjemite) a pink or red hue commonly mistaken for potassium feldspar. . According to U.S. Bureau of Mines claim records (1977), this prospect, which appears to be in complexly faulted and hydrothermally altered trondhjemite and/or metamorphic rocks, was staked for copper. No other information about it has been made public.

Economic information

Economic information about the deposit and operations

Development status Prospect

Mining district

District name Ketchikan

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF KC131

Bibliographic references

  • Deposit

    U.S. Bureau of Mines, 1977, Claim map, Ketchikan quadrangle: U.S. Bureau of Mines Map 120, scale 1:250,000.

  • Deposit

    Berg, H.C., 1973, Geology of Gravina Island Alaska: U.S. Geological Survey Bulletin 1373, 41 p.

  • Deposit

    Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.

  • Deposit

    Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.

Comments on the references

  • Primary Reference = Berg, 1973; Elliott and others, 1978

Reporter information

Type Date Name Affiliation Comment
Reporter 05-JUL-99 H.C. Berg U.S. Geological Survey