Unnamed Occurrence (ARDF - NB102; north of lower Gravel Creek), Chisana Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - NB102; north of lower Gravel Creek)	- not defined -
Chisana Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

The occurrence is in the Wrangell-St. Elias National Preserve.
Location: This occurrence is on the south side of the ridge between lower Baultoff Creek and an unnamed north tributary to lower Gravel Creek. It is about 3,500 feet east-southeast of peak 6006 and 4,000 feet northeast of peak 5648. The site is at an elevation of about 5,200 feet in the SW1/4 of section 36, T. 4 N., R. 23 E. of the Copper River Meridian. This is locality 10 of Richter and others (1973), locality 55 of Richter and others (1975), and National Park Service locality WRST-88 (unpublished data). Cobb and Richter (1980) included this locality as an 'Unnamed occurrence'. It is located to within a few hundred feet.
Geology: A quartz-barite vein in upper Paleozoic marine argillite contains galena, chalcopyrite, and tetrahedrite (Matson and Richter, 1971 [OFR 71-202]; Richter and others, 1975). A sample of the vein contained 0.4 parts per million (ppm) gold, 5 ppm silver, 300 ppm copper, 7,000 ppm lead, and 7,000 ppm zinc (Matson and Richter, 1971 [OFR 71-202]). The host rocks are part of a Permian marine sedimentary sequence (Richter and others, 1973).
Age: Permian or younger. The host rocks are part of a Permian marine sedimentary sequence (Richter and others, 1973).

Commodities (Major) - Ag, Au, Cu, Pb; (Minor) - Ba
Development Status: None
Deposit Model: Quartz -barite vein with galena, chalcopyrite, and tetrahedrite

Other Databases

Link to USGS - Alaska:	NB102

Other Regions, Features and Areas containing this locality

References