Ebbert Prospect, Fairbanks Mining District, Fairbanks North Star Borough, Alaska, USAi

Regional Level Types
Ebbert Prospect	Prospect
Fairbanks Mining District	Mining District
Fairbanks North Star Borough	Borough
Alaska	State
USA	Country

Location: The Ebbert prospect is situated in upper Wolf Creek approximately 2,000 feet northwest of the McCarty mine (ARDF no. LG152); SE1/4SW1/4 sec. 21, T. 3 N., R. 2 E., of the Fairbanks Meridian.
Geology: Gold is found in quartz-rich portions of a shear zone. The lode was sampled and mapped in 1968 and indicated extremely high gold, silver, lead, antimony, arsenic and tin values (Forbes and others, 1968). Quartz veins and wall rock in old prospect trenches carry as much as 2.87 ppm Au (Pilkington and others, 1969, p. 11). Veins that strike N 70 W, dip 55 S, and veins that strike N 65 E, dip 70 S. Altered schist as much as 1 foot into the footwall of the latter vein carries significant gold. Grab samples from veins contained betweeen 0.05 and 2.87 ppm Au (Pilkington and others, 1969). In 1969, the Ebberts prospect was sampled by International Minerals and Chemicals (IMC) in the vicinity of the main shaft. At this point, the shear zone trends N 85 W and dips 60 S and consists of narrow quartz stockwork zones on the hanging wall and foot wall, separated by altered schist. Stibnite and jamesonite occur on the hanging wall as kidney shaped masses. The mineralized zone was 13 feet wide and averaged 0.06 ounces of gold per ton and 8.4 ounces of silver per ton (Pilkington, 1970). IMC also excavated a dozer trench which crossed the Ebberts shear 200 feet east of the Ebberts shaft. The trench exposure assayed 0.046 ounces of gold per ton and 0.32 ounces of silver per ton over 25 feet.
Workings: The first activity was by Hugh M. Hinton who conducted hand trenching on the prospect (Saunders, 1960; ATDM MR 49-4). The prospect remained inactive until dozer trenching was conducted by United States Smelting Refining and Mining (USSR&M) sometime around 1950. Initial exploration examined the prospect's potential for antimony. In June 1960, Arctic Alaska Fisheries and Enterprises Inc. conducted dozer trenching on the prospect and exposed the Ebberts shear zone which was referred to as the Jamesonite shear zone (Saunders, 1960; ATDM MR 49-4). The Ebbert prospect was mined for antimony via a shallow shaft and open cuts from 1961 through 1964 by Ed Ebbert (R. Vetter, oral commun., 1986). The prospect was idle until 1967 when Ed Ebbert re-opened the shaft and open cuts after finding higher gold values in quartz-rich portions of the shear zone (Anderson and Johnson, 1970). In 1969, the Ebberts prospect was sampled by International Minerals and Chemicals (IMC) in the vicinity of the main shaft (Pilkington, 1970). IMC also excavated a dozer trench which crossed the Ebberts shear 200 feet east of the Ebberts shaft.

Commodities (Major) - Au; (Minor) - Ag, As, Pb, Sb, Sn
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).

Other Databases

Link to USGS - Alaska:	LG154

Other Regions, Features and Areas containing this locality

References