Unnamed Occurrence (ARDF - MM145; upper south fork of Stampede Creek), Kantishna Mining District, Denali Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - MM145; upper south fork of Stampede Creek)	- not defined -
Kantishna Mining District	Mining District
Denali Borough	Borough
Alaska	State
USA	Country

The occurrence is in Denali National Park and Preserve.
Location: This occurrence is at an elevation of about 2750 feet at the head of an unnamed south fork of Stampede Creek. It is approximately at the midpoint of the boundary between sections 1 and 2, T. 14 S., R. 15 W., Fairbanks Meridian. The occurrence corresponds to number 65a of Bundtzen, Smith, and Tosdal (1976), and 108 of Thornsberry, McKee, and Salisbury (1984).
Geology: The country rocks in the area of this occurrence are quartz-feldspar schist and gneiss of the upper Precambrian Birch Creek Schist, and graphitic quartzite either of the Birch Creek Schist or of the lower Paleozoic Keevy Peak Formation. The rocks appear to be cut by NE-striking faults subsidiary to the Stampede fault (Thornsberry, McKee, and Salisbury, 1984, pl. K-4; Hawley and Associates, 1978, fig. 4-1-A(2)). The occurrence consists of a foot-thick quartz vein that contains disseminated chalcopyrite and pyrite, and is stained by malachite (Bundtzen, Smith, and Tosdal (1976, occurrence 65a). Hawley and Associates (1978; fig. 4.1-A(2), samples 128-131) collected soil samples on the ridge above the occurrence that contained up to 3.8 ppm silver, 10 ppm molybdenum, 46 ppm antimony, and 255 ppm zinc.
Workings: The vein was discovered and described by Bundtzen, Smith, and Tosdal (1976). Later investigators mapped and collected soil samples in the area (Hawley and Associates, 1978).
Age: The deposit is assumed to be Eocene (see record MM091).
Alteration: Oxidation of copper mineral.

Commodities (Major) - Cu; (Minor) - Ag, Mo, Sb, Zn
Development Status: No
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).

Other Databases

Link to USGS - Alaska:	MM145

Other Regions, Features and Areas containing this locality

References