Louise Prospect, Petersburg Mining District, Hoonah-Angoon Census Area, Alaska, USAi

Regional Level Types
Louise Prospect	Prospect
Petersburg Mining District	Mining District
Hoonah-Angoon Census Area	Census Area
Alaska	State
USA	Country

Location: This prospect is about 1.3 miles south-southeast of the middle of the narrows between the head of Port Houghton and the Salt Chuck east of it. It is about 1.1 mile west of hill 2015 and 0.5 mile southeast of the center of section 29, T. 52 S., R. 77 E. The location is accurate.
Geology: The Louise prospect was found considerably before 1925 (Wright and Wright, 1906; Buddington, 1925); there has probably been no work since, although it has been claimed several times (Still and others, 2002). The workings consist of three open cuts and two short adits. The main adit has 248 feet of drift and crosscuts; it was mapped by Still and others (2002, Figure 26). The deposit occurs in undifferentiated qarnet-quartz-biotite gneiss and amphibolite of Cretaceous to Permian age (Gehrels and Berg, 1992; Still and others, 2002.) The mineralization consists of lenses and disseminations of pyrrhotite and chalcopyrite, with some pyrite and magnetite. The best mineralization is associated with a secondary fault zone that strikes N20W and dips 66W, but the sulfides are also disseminated through the gneiss. The richest sample collected by Still and others (2002) contained 4,899 parts per million copper, but Buddington (1925) reports a sample with 1.34 percent copper.
Workings: The workings consist of three open cuts and two short adits. The main adit has 248 feet of drift and crosscut.
Age: In gneiss and amphibolite of Cretaceous to Permian age.

Commodities (Major) - Cu
Development Status: None
Deposit Model: Chalcopyrite in gneiss and amphibolite.

Other Databases

Link to USGS - Alaska:	SD060

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References