Jonesy; Bald Eagle Mine, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Jonesy; Bald Eagle Mine	Mine
Prince William Sound Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: The mine is located 0.7 mile southeast of the head of Port Audrey on the west side of a ridge north of the east end of Drier Bay and is at an elevation of 1,000 feet. It is in the S1/2 section 17, T. 3 N., R. 10 E., of the Seward Meridian. This is location 103 of Cobb and Richter (1972), location 133 of MacKevett and Holloway (1977), location 222 of Cobb and Tysdal (1980), and location S-59 of Jansons and others (1984). This location is accurate to within 300 feet.
Geology: The mine workings follow a 60-foot-wide shear zone in massive greenstone and chlorite schist. The zone strikes N-S and dips steeply east (Kurtak and Jeske, 1986). Nelson and others (1985) mapped the greenstone and schist as Orca Group of early Teriary age. Post-mineralization basalt dikes are present; these are unmetamorphosed and appear unrelated to mineralization (Kurtak and Jeske, 1986). The age of the dikes is unknown. The mineralization consists of massive, stringer, and disseminated pyrrhotite and chalcopyrite, mostly in the hanging wall of the shear zone (Kurtak and Jeske, 1986). This mineralized zone ranges from 1 to 10 feet in width (Kurtak and Jeske, 1986). The workings consist of an adit with 245 feet of crosscuts and drifts, two stopes, each about 30 feet high, and a water-filled winze of unknown depth (Kurtak and Jeske, 1986). A rough estimate of the stope volume suggest that about 330 tons of material was removed (Kurtak and Jeske, 1986). A single 4-foot-wide chip sample collected from the adit contained 3.3 percent copper, 0.15 ppm gold, and 3.8 ppm silver ( Kurtak and Jeske, 1986).
Workings: The workings consist of 245 feet of crosscuts and drifts, two stopes each about 30 feet high, and a water-filled winze of an unknown depth (Kurtak and Jeske, 1986). Grant and Higgins (1909) reported an aerial tramway, several buildings, a wharf, and a steam plant located near tidewater. A rough estimate of the stope volume suggests that about 330 tons of material was removed (Kurtak and Jeske, 1986). A single 4-foot-wide chip sample collected from the adit contained 3.3 percent copper, 0.15 ppm gold, and 3.8 ppm silver ( Kurtak and Jeske, 1986).
Age: Tertiary or younger; the occurrence is in rocks of the Orca Group of Tertiary age.
Production: Production is estimated at 330 tons of unknown grade (Kurtak and Jeske, 1986). This estimate was arrived at from the volume of the stope.
Reserves: Inferred reserves are 1,300 tons of ore, containing 3.3 percent copper. A few tons of ore is stockpiled on the beach below the prospect (Kurtak and Jeske, 1986).

Commodities (Major) - Cu
Development Status: Yes; small
Deposit Model: Cyprus massive sulfide (Cox and Singer, 1986; model 24a)

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Link to USGS - Alaska:	SR240

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References