Maiyumerak Mtn. Occurrence

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID	10003136
MRDS ID	A015669
Record type	Site
Current site name	Maiyumerak Mtn. Occurrence

Geographic coordinates

Geographic coordinates:	-162.03699, 67.78278 (WGS84)
Location accuracy	2000(meters)
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Geographic areas

Country	State
United States	Alaska

Commodities

Commodity	Importance
Copper	Tertiary

Materials information

Materials	Type of material
Chalcopyrite	Ore
Pyrite	Gangue

Nearby scientific data

(1)	-162.03699, 67.78278	ListMap

Comments on the geologic information

THE MAIYUMERAK MOUNTAINS ARE CONSIDERED TO BE PART OF THE ASIK MOUNTAIN PLUTON. SERPENTINE AND DARK GREEN TO BLACK BASALT WITH AMYGDULES FILLED WITH CALCITE AND EPIDOTE APPEAR TO BE THE MOST COMMON ROCK TYPES. THE SERPENTINE COMMONLY CONTAINS SMALL AMOUNTS OF FINE-GRAINED PYRITE AS DISSEMINATIONS AND FRACTURE FILLINGS. THE WEATHERING OF PYRITE PRODUCES LARGE ORANGE TO RED STAINED AREAS ON OUTCROPS AND ALONG STREAMS.

Economic information

Economic information about the deposit and operations

Development status	Occurrence
Commodity type	Metallic
Deposit size	Small
Significant	No

Mining district

District name	Noatak

Land status

Ownership category	National Park

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	A015669

Bibliographic references

Deposit

USBM OF 103-78, P. 241-249, 491.
Deposit

USGS OF 81-767B, P. B13.

General comments

Subject category	Comment text
Deposit	MINOR AMOUNTS OF PYRITE AND CHALCOPYRITE IN SERPENTINE AND BASALT.
Deposit	THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-AUG-1987	Powers, M.T. (Huber, D.F.)	U.S. Geological Survey