Booshu Camp Prospect, Bering Sea Mining District, Nome Census Area, Alaska, USAi

Regional Level Types
Booshu Camp Prospect	Prospect
Bering Sea Mining District	Mining District
Nome Census Area	Census Area
Alaska	State
USA	Country

Locality 6 (West Cape) of Cobb (1972) should be deleted (Cobb, 1980, p. 51) as the cited reference information (Anderson, 1947, p. 35-36) is for the Booshu Camp site and not West Cape.
Location: The Booshu Camp site is located on a wave cut platform 1/2 mile south of the mouth of the Moghoweyik River, on the west coast of St. Lawrence Island. Mineralization here is exposed along the beach and for 150 feet inland across the wave cut bench. This site is located within 1/4 mile; it is locality 3 of Cobb (1972) and Cobb (1980) summarized relevant references under the name 'Booshu Camp'.
Geology: Molybdenite mineralization here is in the Sevuokuk pluton, a mid-Cretaceous (108 +/- 3.2 Ma) composite body that includes biotite hornblende quartz monzonite and biotite quartz monzonite phases (Csejtey, Patton, and Miller, 1971; Patton and Csejtey, 1980). At this site, molybdenite occurs as disseminations and as scaly fracture and joint coatings (Anderson, 1947, p. 35-36) in biotite quartz monzonite. Small amounts of chalcopyrite and pyrite locally accompany the molybdenite. The mineralization appears to be concentrated in a zone along the shoreline between major joints. Results of channel sampling here included (1) 3 feet of 0.71 % MoS2, (2) 6 feet of 0.28 % MoS2, and (3) 15 feet of 0.17 % MoS2 (Anderson, 1947, p. 36). Three grab samples of mineralized quartz monzonite contained 150, 700, and 1,000 ppm molybdenum and 300, 10, and 30 ppm copper respectively (Patton and Csejtey, 1971, p. C8). Alteration is restricted to small amounts of quartz (at least some in veins) and partial sericitization of feldspars (Patton and Csejtey, 1971, p. C8 and C10).
Workings: Results of channel sampling here included (1) 3 feet of 0.71 % MoS2, (2) 6 feet of 0.28 % MoS2, and (3) 15 feet of 0.17 % MoS2 (Anderson, 1947, p. 36). Three grab samples of mineralized quartz monzonite contained 150, 700, and 1,000 ppm molybdenum and 300, 10, and 30 ppm copper respectively (Patton and Csejtey, 1971, p. C8).
Age: Mid-Cretaceous, the age of the host Sevuokuk pluton (108 +/- 3.2 Ma; Patton and Csejtey, 1980).
Alteration: Alteration is restricted to small amounts of quartz (at least some in veins) and partial sericitization of feldspars (Patton and Csejtey, 1971, p. C8 and C10).

Commodities (Major) - Mo
Development Status: None
Deposit Model: Fracture fillings and disseminations of molybdenite in granitic rock. Deposit m

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Link to USGS - Alaska:	SL004

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References