Unnamed (in upper Treasure Creek)

The Unnamed (in upper Treasure Creek) is a gold mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Unnamed (in upper Treasure Creek)

Commodity

Primary: Gold

Location

State: Alaska
District: Fairbanks

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Silicification and quartz veining are common in rock fragments found throughout the anomaly, as well as iron staining, clay alteration, and bleaching of schist. The quartz porphyry that marks the north edge of the anomaly is silicified and vuggy, and limonite fills vugs locally (Dashevsky, 1993).

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold

Comments

Comment (Workings): Workings / Exploration = In the 1970's, Cantu Minerals conducted a soil-geochemistry survey of the area. In the 1980's, Tri-Con Mining, Inc. (the operating arm of CAN-EX Resources Inc.) reanalyzed some of the old soil sample pulps for gold and conducted some trenching. In 1990, American Copper and Nickel Company assumed interest in the Eagle Creek properties and sampled existing trenches and check-sampled across the previously defined gold-arsenic soil anomaly (Dashevsky, 1993).

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Dashevsky, 1993

Comment (Deposit): Model Name = Schist-hosted gold- and antimony-bearing quartz veins.

Comment (Geology): Geologic Description = The following geologic description is summarized from a report by Sam Dashevsky (1993) on work done by American Copper and Nickel Company on the Eagle Creek property in the early 1990's. In the 1970's, an arsenic soil anomaly was identified in the area, and two samples were identified that contained more than 100 ppb gold. The soil anomaly is approximately 1,700 feet by 1,000 feet in area and contains anomalous levels of gold, antimony, arsenic, lead, and silver with erratic boron, copper and zinc values. The soil anomaly is underlain by quartz-mica schists, minor quartzite, and minor graphitic schist. (This area was mapped by Newberry and others (1996) as Fairbanks Schist that consists of quartz-muscovite schist, quartzite, and chlorite-quartz schist). Silicification and quartz veining were noted in approximately half the soil pits. The trace of the anomaly follows the southern contact zone of a feldspar porphyry body. The soil anomaly diminishes over an intrusive. The igneous float in the area is altered to clay and locally silicifiied. A north-dipping fault has been inferred from airphotos and soil geochemistry. An east-northeast trending linear was traced from airphotos; the linear trends from the saddle between the east fork of Any Creek and Treasure Creek through the main body of the geochemical anomaly. Cross-cutting faulting is indicated by a sharp break in slope, suggestive of a fault scarp, that runs north-northeast through the anomalous area. Rock geochemistry on float fragments of the intrusive that were found in the soil pits indicates as much as 250 ppb gold. In a trench sample, rare quartz-stibnite-veined schist contains 6,050 ppb gold , 4.4 percent antimony, 2 ounces of silver per ton, and 758 ppm arsenic. Another specimen of silicified schist from the same location that is cross-cut by vuggy crustiform quartz veins contains 4,610 ppb gold, 4,601 ppm arsenic, 98 ppm antimony, and 3.5 ppm silver. Silicification and quartz veining are widespread throughout the anomaly. Iron staining, clay alteration, and bleaching of schist are noted in soil pit schist fragments. The quartz porphyry that marks the north edge of the anomaly is silicified and vuggy, and limonite fills vugs locally (Dashevsky, 1993).

References

Reference (Deposit): Newberry, R.J., Bundtzen, T.K., Clautice, K.C., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks mining district, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16, 17 p., 2 sheets, scale 1:63,360.

Reference (Deposit): Dashevsky, S.S., 1993, Eagle Creek project (Au), Fairbanks district, Alaska: American Copper and Nickel Company, Inc., 60 p. (Report held by Sam Dashevsky, Northern Associates Inc., Fairbanks, Alaska; can be examined with permission from current lease holders).

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