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  3. Mineral Resource Data System (MRDS)

Unnamed (in upper Treasure Creek)

Prospect in Alaska, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10307442
Record type Site
Current site name Unnamed (in upper Treasure Creek)

Geographic coordinates

Geographic coordinates: -147.81596, 64.99667 (WGS84)
Relative position This prospect is a 1,700-foot by 1,000-foot area on the western side of upper Treasure Creek that is defined by anomalous gold, antimony, arsenic, lead, and silver in soils. It trends southwest toward the saddle along Any Creek Trail (winter) that is 2,500 feet north of Old Murphy Dome Road in the SE1/4 sec. 18, T. 2 N., R. 1 W ., Fairbanks Meridian.

Site location context

Political divisions (FIPS codes)

Fairbanks North Star(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fairbanks D-2(quadrangle 1:63,360 scale)

Big Delta NW(quadrangle 1:100,000 scale)

Fairbanks(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

LG(Federal land areas administered by LG)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Alteration

  • (Local) 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).

Nearby scientific data

(1) -147.81596, 64.99667
ListMap

Economic information

Comments on the geologic information

  • 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).

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Fairbanks

Comments on the workings information

  • 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).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Dashevsky, 1993

General comments

Subject category Comment text
Deposit Model Name = Schist-hosted gold- and antimony-bearing quartz veins.

Reporter information

Type Date Name Affiliation Comment
Reporter 31-JUL-01 J.R. Guidetti Schaefer and C.J. Freeman Avalon Development Corporation

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.