Unnamed Occurrence (ARDF - MM038; on Kankone Peak), Kantishna Mining District, Denali Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - MM038; on Kankone Peak)	- 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 4450 feet about 1000 feet northwest of the top of Kankone Peak. It is about at the center of the S1/2 SW1/4 section 11, T. 15. S., R. 16 W., Fairbanks Meridian. The location is accurate within 300 feet. The occurrence corresponds to number 61 of Bundtzen, Smith, and Tosdal (1976), 23 of MacKevett and Holloway (1977), 291 of Hawley and Associates (1978), and 68 of Bundtzen (1981), and is referred to in Cobb (1980 [OFR80-363]). It is at the same location as occurrence 99 of Thornsberry, McKee, and Salisbury (1984, fig. K-8), but their description of the geology does not agree with that of Bundtzen, Smith, and Tosdal, and of Hawley and Associates.
Geology: Stratabound, disseminated and semimassive sulfides occur in layers of greenstone schist of the upper Precambrian Birch Creek Schist. The greenstone schist strikes NE and dips moderately to the SE, off the Kantishna antiform (MM091) (Bundtzen, Smith, and Tosdal, 1976; Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2). The sulfide-bearing zone is parallel to the schistosity of the host greenstone, and is 4 to 6 feet thick. It contains pyrite, chalcopyrite, azurite, and malachite. Samples assayed up to 1.02 percent copper and 1.19 ounces of silver per ton (Hawley and Associates, 1978, fig. and table 4.1-A(1)). The stratabound zone is cut by fracture-controlled, sulfide-bearing veinlets. A sample of these veinlets assayed 0.91 ounce of silver per ton, and 6000 to 6900 ppm each of lead and zinc, suggesting that the veinlets contain galena and sphalerite (Bundtzen, 1981).
Workings: The occurrence was discovered in the mid-1970s (Bundtzen, Smith, and Tosdal, 1976). There are no workings.
Age: Possibly late Precambrian, the protolith age of the Birch Creek Schist. The deposit could be younger, but is pre-metamorphic. The stratabound deposit is cut by sulfide veinlets assumed to be Eocene (see record MM091).
Alteration: Oxidation of copper minerals.

Commodities (Major) - Cu; (Minor) - Ag
Development Status: No
Deposit Model: Stratabound mineral deposit in greenschist. Polymetallic veins (Cox and Singer

Other Databases

Link to USGS - Alaska:	MM038

Other Regions, Features and Areas containing this locality

References