Unnamed (southeast of Soda Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals native copper

Geographic location

Quadrangle map, 1:250,000-scale NB
Quadrangle map, 1:63,360-scale C-4
Latitude 62.534
Longitude -142.8867
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the north-facing slopes, southeast of Soda Lake. It is at an elevation of about 4,500 feet, about 1,800 feet south-southeast of the east end of Soda Lake and 2,000 feet north of hill 5410. The site is just north of the center of section 25, T. 9 N., R. 13 E. of the Copper River Meridian. This is locality 10 of Richter and others (1975) and National Park Service locality WRST-11 (unpublished data). Cobb and Richter (1980) included this locality as an 'Unnamed occurrence'. It is located to within a few hundred feet.

Geologic setting

Geologic description

Native copper occupies fractures in amygdaloidal basalt of the Triassic, Nikolai Greenstone (Richter and others, 1975, 1976; Richter, 1976). Copper mineralization is locally common in Nikolai Greenstone and is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).
Geologic map unit (-142.888845982411, 62.5336318798464)
Mineral deposit model Basaltic copper (Cox and Singer, 1986; model 23)
Mineral deposit model number 23
Age of mineralization Cretaceous? Copper mineralization is locally common in Nikolai Greenstone and is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).

Production and reserves

Indication of production None

Additional comments

The occurrence is in the Wrangell-St. Elias National Preserve.

References

MRDS Number A011441

References

Reporters Travis L. Hudson (Applied Geology)
Last report date 11/24/2002