North Star; Mammoth Prospect, Kantishna Mining District, Denali Borough, Alaska, USAi

Regional Level Types
North Star; Mammoth Prospect	Prospect
Kantishna Mining District	Mining District
Denali Borough	Borough
Alaska	State
USA	Country

The area is in Denali National Park and Preserve.
Location: The North Star prospect (Cobb, 1980 [OFR 80-363]) is at the head of Crevice Creek, about 500 feet below the divide northeast of Spruce Peak. It is about 0.25 mile northwest of the center of section 29, T. 15 S., R. 16 W., Fairbanks Meridian. The location is uncertain, but probably accurate within 500 feet. It seems likely that the North Star prospect of Wells (1933) is the Mammoth claim of Capps (1919). It also seems likely that the North Star is the same as the Slide claim of Moneta-Porcupine (Heiner and Porter, 1972, KX 66-18; Hawley and Associates, 1978), which covers claims originally in force in 1919. The correlation of the Mammoth claim with Lucky Jim (MM056), as suggested by Bundtzen (1981) and Thornsberry, McKee, and Salisbury (1984), seems unlikely. The North Star is included with nearby claims in location 22 of Cobb (1972 [MF 366]), and in location 17 of MacKevett and Holloway (1977).
Geology: Strike- and cross-faults in upper Crevice Creek juxtapose graphitic and chloritic schist and phyllite of the Spruce Creek sequence against quartzose schist of the Birch Creek Schist (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2). The deposit(s) in the prospect area consist of sulfide-bearing quartz vein(s). A 2-foot-thick quartz vein that contains pyrite, galena, and sphalerite occurs in a stream-cut exposure in upper Crevice Creek (Wells, 1933). Wells (p. 375) also reported a nearby 6-foot-thick, galena-rich vein in a pit that had caved. In about 1960, Moneta-Porcupine staked the Slide claim in this area (Heiner and Porter, 1972). No assays have been published.
Workings: The area is covereed by extensive talus and prospect pits apparently slough rapidly. The Mammoth deposit was located by 1916, but Capps did not visit the site because of a report that the discovery cut had sloughed (Capps, 1919, p. 99). The area was prospected by C. A. Trundy in 1931 (Wells, 1933), and by Moneta-Porcupine in about 1960 (Heiner and Porter, 1972).
Age: The deposit is assumed to be Eocene (see record MM091).

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

Other Databases

Link to USGS - Alaska:	MM053

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References