Unnamed (west of Chirikof Point)

Occurrence in Alaska, United States with commodities Iron, Copper, Lead

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Materials information
Alteration
Nearby scientific data
Economic information about the deposit and operations
Mining district
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10307227
Record type	Site
Current site name	Unnamed (west of Chirikof Point)

Geographic coordinates

Geographic coordinates:	-173.42237, 52.81897 (WGS84)
Relative position	This site is located west of Chirikof Point on Attu Island. Its specific location is not known. The map site is probably accurate to within 3 miles.

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

USGS map quadrangles

Seguam NW(quadrangle 1:250,000 scale)

Geographic areas

Country	State
United States	Alaska

Commodities

Commodity	Importance
Iron	Primary
Copper	Secondary
Lead	Secondary

Materials information

Materials	Type of material
Chalcopyrite	Ore
Galena	Ore
Pyrite	Ore

Alteration

(Local) The altered rocks contain silica, albite, epidote, chlorite, and iron-oxides.

Nearby scientific data

(1)	-173.42237, 52.81897	ListMap

Economic information

Comments on the geologic information

Geologic Description = On Attu Island partly oxidized zones of pyrite occur in many rock types, including basalt and andesite flows and pyroclastics (Gates and others, 1971). The zones range in size from small isolated pods a few feet in diameter to broad areas 2 to 3 miles long and one mile wide. Many elongate zones or small, isolated patches trend or are aligned east-west. At Chirikof Point pyritic mineralization is associated with flows and hornblende-bearing dikes and shows evidence of silicification and albitization with accompanying epidote and chlorite. The mineralized zones carry traces of copper and lead.
Age = Tertiary or younger.

Economic information about the deposit and operations

Development status	Occurrence

Comments on exploration

Status = Inactive

Mining district

District name	Aleutian Islands

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Alaska Resource Data File	ARDF	AT002

Bibliographic references

Deposit

Gates, O., Powers, H.A., and Wilcox, R.E., 1971, Geology of the Near Islands, Alaska: U.S. Geological Survey Bulletin 1028-U, 113 p., 3 map sheets, scale 1:63,360.

Comments on the references

Primary Reference = Gates and others, 1971

General comments

Subject category	Comment text
Deposit	Other Comments = Site is located within Aleutian Maritime Wildlife Refuge.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	22-JAN-00	S.H. Pilcher	U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.