Prospect in Alaska, United States with commodities Copper, Zinc

Geologic information

Identification information

Deposit ID 10307657
Record type Site
Current site name Sharon

Geographic coordinates

Geographic coordinates: -131.51977, 55.33074 (WGS84)
Relative position This prospect is known only from U.S. Bureau of Mines (1977) claim records. Its approximate location is at an elevation of about 100 feet on Whitman Creek, about 0.3 mile north of the mouth of Herring Bay. The site is in section 25, T. 75 S., R. 91 E., of the Copper River Meridian. It corresponds to loc. 75 in Elliott and others (1978). The location is accurate within about 0.2 mile.
(click for info)

Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary
Zinc Primary

Nearby scientific data

(1) -131.51977, 55.33074

Comments on the geologic information

  • Geologic Description = The country rocks in this part of Revillagigedo Island are mainly marine, andesitic or basaltic metavolcanic rocks and interbedded pelitic metasedimentary rocks that are intruded by Cretaceous sills and dikes of feldspar-porphyritic granodiorite, and by a stock of Tertiary gabbro (Berg and others, 1988). The strata and some of the granodiorite were regionally metamorphosed to greenschist grade in Late Cretaceous time, and subsequently remetamorphosed to hornblende hornfels near the contacts of the gabbro stock. The premetamorphic age of the strata is uncertain. Berg and others (1988) note that they closely resemble Upper Jurassic to mid-Cretaceous flysch and volcanic rocks nearby on Gravina Island. . According to U.S. Bureau of Mines claim records (1977), this prospect, which appears to be in metasedimentary rocks near the contact of the gabbro stock, was staked for copper and zinc. 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 KC078

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

    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 = Elliott and others, 1978; Berg and others, 1988

Reporter information

Type Date Name Affiliation Comment
Reporter 03-JUL-99 H.C. Berg U.S. Geological Survey