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Ebbert

Prospect in Alaska, United States with commodities Gold, Silver, Arsenic, Lead, Antimony, Tin
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Geologic information

Identification information

Deposit ID 10003009
MRDS ID A015522
Record type Site
Current site name Ebbert

Geographic coordinates

Geographic coordinates: -147.36184, 65.06662 (WGS84)
Relative position 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.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Arsenic Secondary
Lead Secondary
Antimony Secondary
Tin Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Galena Ore
Gold Ore
Jamesonite Ore
Stibnite Ore

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -147.36184, 65.06662
ListMap

Comments on the geologic information

  • Geologic Description = 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.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Fairbanks

Comments on the workings information

  • Workings / Exploration = 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.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015522
USGS Alaska Resource Data File ARDF LG154

Bibliographic references

  • Deposit

    Saunders, R.H., 1960, Notes to accompany prospect map of the Fairbanks-Wolf Creek divide: Alaska Territorial Department of Mines Miscellaneous Report 49-4, 3 p., 2 maps, scale 1:1200.

  • Deposit

    Forbes, R.B., Pilkington, H.D., and Hawkins, D.B., 1968, Gold gradients and anomalies in the Pedro Dome-Cleary Summit area, Fairbanks District, Alaska: U.S. Geological Survey Open-File Report 324, 43 p.

  • Deposit

    Pilkington, H.D., 1970, Keystone Mines Inc. exploration program summary: International Minerals & Chemicals Corporation, 61 p. , 1 plate.

  • Deposit

    Saunders, R.H., 1960, Notes to accompany prospect map of the Fairbanks-Wolf Creek divide: Alaska Territorial Department of Mines Miscellaneous Report 49-4, 3 p., 2 sheets, scale 1:1200.

Comments on the references

  • Primary Reference = Pilkington, 1970

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-MAY-1999 C.J. Freeman Avalon Development Corporation
Reporter 04-MAY-1999 J.R. Guidetti Schaefer Avalon Development Corporation