Alaska Resource Data File 

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic code. Any use 

of trade, product, or firm names is for descriptive purposes only and does not imply 

endorsement by the U.S. Government. 

OPEN-FILE REPORT 00-030 

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Distribution of mineral occurrences in the Gareloi Island

1:250,000-scale quadrangle, Aleutian Islands, Alaska

 This and related reports are accessible through the USGS World Wide Web site 

http://ardf.wr.usgs.gov. Comments or information regarding corrections or missing 

data, or requests for digital retrievals should be directed to: Frederic Wilson, USGS, 4200 

University Dr., Anchorage, AK 99508-4667, e-mail fwilson@usgs.gov, telephone (907) 

786-7448. This compilation is authored by:

 Steven H. Pilcher

 Anchorage, AK

Gareloi Island quadrangle

 Descriptions of the mineral occurrences shown on the accompanying figure follow. 

See U.S. Geological Survey (1996) for a description of the information content of each field 

in the records. The data presented here are maintained as part of a statewide database 

on mines, prospects and mineral occurrences throughout Alaska.
Alaska Resource Data File 

Page 2 

Site name(s): Unnamed (on Gareloi Island) 

Site type: Occurrence 

ARDF no.: GI001 

Latitude: 51.76 Quadrangle: GI 

Longitude: 178.77 

Location description and accuracy:

 This site is located near the southeast coast of Gareoli Island approximately 1 1/2 miles 

east of triangulation point Gareoli. Site is accurate to within 2 miles. 

Commodities: 

 Main: Cu 

 Other: 

Ore minerals: Atacamite, paratacamite 

Gangue minerals: 

Geologic description:

 Copper sublimate occurs on the scoriaceous surface of a lava flow (Coats, 1951). This 

material was found to be a mixture of atacamite and paratacamite. 

Alteration:

 

Age of mineralization:

 

Deposit model:

 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

 

Production Status: None 

Site Status: Inactive 

Workings/exploration:

 The U.S. Geological Survey mapped this area in the 1950's (Coats, 1951). 

Production notes:

 

GI001 
Alaska Resource Data File 

Page 3 

Reserves:

 

Additional comments:

 This site is located in the Aleutian Maritime Wildlife Refuge. 

References:

Coats, 1951; Fraser and Barnett, 1959. 

Primary reference: Coats, 1951 

Reporter(s): S.H. Pilcher (Anchorage) 

Last report date: 1/20/00 

GI001 
Alaska Resource Data File 

Page 4 

 References

Coats, R.R., 1951, Geologic reconnaissance of Gareloi Island, Alaska: U.S. Geological Survey Bulletin 1028-J, 7 

p. 1 map sheet, scale 1 inch equals 3/4 mile. 

Fraser, G.D., and Barnett, F.H., 1959, Geology of the Delarof and westernmost Andreanof Islands, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-I, 37 p., 4 map sheets, scale 1:250,000 and 

1:25,000. 

Herzog, D.A., 1988, References to coastal mineral occurrences of Alaska: U.S. Bureau of Mines Open-File Report 29-88, 308 p. 

Ransome, A.L., and Kerns, W.H.,1954, Names and definitions of regions, districts, and subdistricts in Alaska: U.

S. Bureau of Mines Information Circular 7679, 91 p. 

References