Bunker Hill Prospect, Council Mining District, Nome Census Area, Alaska, USAi

Regional Level Types
Bunker Hill Prospect	Prospect
Council Mining District	Mining District
Nome Census Area	Census Area
Alaska	State
USA	Country

Location: This prospect is on the low ridge between Eldorado Creek (ARDF SO007) and Lost Creek, 1.7 miles north-northwest of Bluff. It is at an elevation of about 320 feet and is locality 20 of Cobb (1972, MF 445; 1978, OF 78-181).
Geology: A 5.5-foot-wide quartz vein or silicified zone at a marble-schist contact carries sparse chalcopyrite, pyrite, malachite, and azurite; the central 18 inches is barren (Cathcart, 1922). Assays reported by early workers ran up to up to $80 per ton of gold (3.9 ounces per ton) (Cathcart, 1922). Bedrock in this area is part of a lower Paleozoic metasedimentary marble-schist assemblage (Herried, 1965; Till and others, 1986). The mineralization may be mid-Cretaceous in age, the age of some lode gold deposits on southern Seward Peninsula. The southern Seward Peninsula lode gold deposits formed as a result of mid-Cretaceous metamorphism (Apodoca, 1994; Ford, 1993, Ford and Snee, 1996; Goldfarb and others, 1997) that accompanied regional extension (Miller and Hudson, 1991) and crustal melting (Hudson, 1994). This higher temperature metamorphism was superimposed on high pressure/low temperature metamorphic rocks of the region.
Workings: Exploration consists of two, old shallow trenches, 2 feet deep and 20 feet long (Cathcart, 1922).
Age: Not known - possibly mid-Cretaceous.
Alteration: Silicification is indicated.

Commodities (Major) - Au, Cu
Development Status: No
Deposit Model: Quartz vein or replacement at marble-schist contact; possibly low sulfide Au qu

Other Databases

Link to USGS - Alaska:	SO008

Other Regions, Features and Areas containing this locality

References