Booshu Camp

Prospect, Inactive

Commodities and mineralogy

Main commodities Mo
Ore minerals chalcopyrite; molybdenite
Gangue minerals quartz; pyrite

Geographic location

Quadrangle map, 1:250,000-scale SL
Quadrangle map, 1:63,360-scale C-6
Latitude 63.458
Longitude -171.823
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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'.

Geologic setting

Geologic description

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).
Geologic map unit (-171.825791375805, 63.4570640594468)
Mineral deposit model Porphyry Mo, low-F? (Cox and Singer, 1986; model 21b?).
Mineral deposit model number 21b?
Age of mineralization Mid-Cretaceous, the age of the host Sevuokuk pluton (108 +/- 3.2 Ma; Patton and Csejtey, 1980).
Alteration of deposit 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).

Production and reserves

Workings or exploration 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).
Indication of production None

Additional comments

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.

References