Blue Lode Prospect, Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Blue Lode Prospect	Prospect
Yentna Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

MAS/MIL number 20760011.
Location: The Blue Lode prospect is at an elevation of about 4,200 feet on the south, valley wall of the Middle Fork, Iron Creek, 0.6 mile northeast of the top of hill 5066. The prospect is in the NE1/4SE1/4 sec. 15, T. 26 N., R. 2 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 73 of Csejtey and Miller (1978).
Geology: The Blue Lode prospect consists of chalcopyrite and bornite disseminated in Triassic, Nikolai Greenstone(?) (Schmidt and others, 2002). Outcrops on a cliff show conspicuous malachite and azurite staining. A 2-foot-wide shear zone strikes N16E and dips steeply to the west; it contains some chalcopyrite-bearing quartz (Capps, 1919 [B 692]). Samples collected by the U.S. Bureau of Mines contain up to 70,000 parts per million copper and 44 parts per million silver (Fechner, 1986).
Workings: Workings consist of an open cut. Samples collected by the U.S. Bureau of Mines contain up to 70,000 parts per million copper and 44 parts per million silver (Fechner, 1986). As of January 1, 2000, Cominco held a block of approximately 25 state claims covering this and adjacent prospects (Northern Associates Inc., written commun., 2001).
Age: Occurs in Triassic Nikolai Greenstone.
Alteration: Oxidation of copper minerals.

Commodities (Major) - Ag, Cu
Development Status: None
Deposit Model: Basaltic Cu (Cox and Singer, 1986; model 23)

Other Databases

Link to USGS - Alaska:	TK079

Other Regions, Features and Areas containing this locality

References