Unnamed Occurrence (ARDF - MC184; northeast of benchmark Verde), Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - MC184; northeast of benchmark Verde)	- not defined -
Nizina Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is in the headwaters of an unnamed north tributary to the Klu River. It is at an elevation of about 5,400 feet, 1.7 miles northeast of triangulation station Verde (elevation 6233) and 6,500 feet northwest of elevation 5433. The site is in the SE 1/4 of section 22, T. 7 S., R. 11 E. of the Copper River Meridian. This is locality 42 of MacKevett (1976); the location is probably accurate to within 1,000 feet.
Geology: This occurrence consists of a serpentinized ultramafic body that is in fault contact with gabbro (MacKevett, 1976). A sample of the serpentinite contained greater than 10 percent magnesium, 100 parts per million (ppm) cobalt, 3,000 ppm chromium, and 2,000 ppm nickel. The mafic and ultramafic rocks are emplaced in Upper Paleozoic metamorphic rocks (MacKevett, 1978).
Workings: Only limited surface sampling.
Age: Late Paleozoic or younger based on the age of the metamorphic country rocks.
Alteration: Serpentinization.

Commodities (Major) - Cr, Ni; (Minor) - Co
Development Status: None
Deposit Model: Podiform chromite? (Cox and Singer, 1986; model 8a)

Other Databases

Link to USGS - Alaska:	MC184

Other Regions, Features and Areas containing this locality

References