Unnamed (head of Ursus Cove) (ARDF #IL026) Cu

Unnamed (head of Ursus Cove)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Cu
Ore minerals	copper sulfides

Geographic location

Quadrangle map, 1:250,000-scale	IL
Quadrangle map, 1:63,360-scale	C-3
Latitude	59.5289
Longitude	-153.7978
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The location of this occurrence at the head of Ursus Cove is uncertain. Detterman and Cobb (1972, no. 15) reported a copper occurrence about in the SW1/4 NE1/4 sec. 1, T. 8 S., R. 27 W., Seward Meridian, and cite Detterman and Reed (1964) as their source. Detterman and Reed (1964), however, show a copper occurrence near sea level at the mouth of an unnamed creek entering Ursus Cove in the SW1/4 sec. 31, T. 7 S., R. 26 W,, and no location in section 1, as pointed out by Cobb (1976, p. 29). For this record, the site is about as shown by Detterman and Reed (1964).

Geologic setting

Geologic description Strata exposed near this reported occurrence are layered volcanic and sedimentary rocks in north-northeast-trending open folds that are cut by north-northeast-striking faults (Detterman and Reed, 1980). The strata include limestone-rich units of the Upper Triassic Kamishak Formation, and andesitic volcanic rocks and minor sedimentary rocks of the Middle Jurassic Talkeetna Formation. Detterman and Reed (1964) reported copper sulfides along the south shore of Ursus Cove, but because Detterman and Reed's location is uncertain, the host rocks are unknown.
Geologic map unit	(-153.799940256549, 59.5282380164322)

Geologic description

Strata exposed near this reported occurrence are layered volcanic and sedimentary rocks in north-northeast-trending open folds that are cut by north-northeast-striking faults (Detterman and Reed, 1980). The strata include limestone-rich units of the Upper Triassic Kamishak Formation, and andesitic volcanic rocks and minor sedimentary rocks of the Middle Jurassic Talkeetna Formation. Detterman and Reed (1964) reported copper sulfides along the south shore of Ursus Cove, but because Detterman and Reed's location is uncertain, the host rocks are unknown.

Geologic map unit

(-153.799940256549, 59.5282380164322)

Production and reserves

Workings or exploration	Reconnaissance geologic mapping (Detterman and Reed, 1964, 1980).
Indication of production	None

References

MRDS Number	A013045
References Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485, 101 p. Detterman, R.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Iliamna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-364, 1 sheet, scale 1:250,000. Detterman, R. L., and Reed, B. L., 1964, Preliminary map of the geology of the Iliamna quadrangle, Alaska: U. S. Geological Survey Miscellaneous Geological Investigations Map I-407, 1 sheet, scale 1:250,000. Detterman, R.L., and Reed, B.L., 1980, Stratigraphy, structure, and economic geology of the Iliamna quadrangle, Alaska: U.S. Geological Survey Bulletin 1368-B, 86 p.
Reporters	C.C. Hawley, Hawley Resource Group, Anchorage, Alaska
Last report date	6/7/2003