Grizzly Bear Prospect (Grizzly), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Grizzly Bear Prospect (Grizzly)	Prospect
Valdez Creek Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

MAS/MIL number 20760051.
Location: This prospect is at an elevation of about 3,850 feet, about 1.2 miles southeast of lake 2695. The prospect is near the center of sec. 27, T. 22 S., R. 2 W., Fairbanks Meridian. The location is accurate to within 1/4 mile. This is locality 15 and 16 of Csejtey and Miller (1978).
Geology: At the Grizzly Bear prospect, a sulfide-bearing felsic dike cuts Triassic metabasalt (Csejtey and others, 1978). The sulfide minerals are bornite, chalcopyrite, pyrite, and pyrrhotite. Low-grade sulfide veins and disseminated sulfides also occur in silicified metabasalt. A U.S. Geological Survey sample of mineralized volcanic rock contains 0.5 part per million gold; a sample of felsic intrusive rock contained 3 parts per million silver and 350 parts per million copper (Miller and others, 1978). A U.S. Bureau of Mines grab sample of limonitic metabasalt contains 5.17 percent copper, 0.4 parts per million gold, and 550 parts per million tungsten (Kurtak and others, 1992). Private industry has collected 315 soil samples (Don Stevens, written commun., 1992). Cities Service Minerals Company held 96 claims in 1972-73. Northland Mines held 18 lode claims in 1974. Other claims at the prospect include Fox 1-2, Moraine 1-2, Greenstone 1-4, and Shadow Mountain 1-10. As of January 1, 2000, a block of approximately 96 state mining claims covered this and adjacent prospects (Northern Associates Inc., written commun., 2001).
Workings: Surface sampling by U.S. Geological Survey and U.S. Bureau of Mines (Miller and others, 1977; Kurtak and others, 1992). Private industry has collected 315 soil samples (Don Stevens, written commun., 1992). Cities Service Minerals Company held 96 claims in 1972-73. Northland Mines held 18 lode claims in 1974. Other claims at the prospect include Fox 1-2, Moraine 1-2, Greenstone 1-4, and Shadow Mountain 1-10. As of January 1, 2000, a block of approximately 96 state mining claims covered this and adjacent prospects (Northern Associates Inc., written commun., 2001).
Alteration: Silicified mafic metavolcanic rocks; iron oxide alteration.

Commodities (Major) - Au, Cu; (Minor) - Ag, W
Development Status: None
Deposit Model: Porphyry Cu-Au, Basaltic copper, or Polymetallic vein? (Cox and Singer, 1986; m

Other Databases

Link to USGS - Alaska:	TK032

Other Regions, Features and Areas containing this locality

References