1. Mineral Resources
  2. Online Spatial Data
  3. Alaska Resource Data File (ARDF)

Gypsum Creek

Prospect, Probably inactive

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Au

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale D-3
Latitude 57.9094
Longitude -134.9957
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Gypsum Creek placer prospect is at an elevation of about 100 feet on Gypsum Creek. The prospect is just south of the center of sec. 2, T. 46 S., R. 64 E. It is MAS no. 0021140218 (U.S. Bureau of Land Management, 2002). The location probably is accurate within 0.2 mile.

Geologic setting

Geologic description

The rocks in the vicinity of this prospect are part of the Mississippian, Iyoukeen Formation (Lathram and others, 1965). The upper half of the formation is cherty fossiliferous limestone; the lower half is fossiliferous shale with minor limestone. A Cretaceous hornblende-biotite quartz monzonite stock is about 1.5 miles north of the mine. The only information about this prospect is that one or more claims were staked for placer gold.
Geologic map unit (-134.997483359803, 57.9090612292363)
Mineral deposit model Placer gold (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration The only information about this prospect is that one or more claims were staked for placer gold.
Indication of production None

References

References

Lathram, E.H., Pomeroy, J.S., Berg, H.C., and Loney, R.A., 1965, Reconnaissance geology of Admiralty Island, Alaska: U.S. Geological Survey Bulletin 1181-R, p. R1-R48.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
Reporters Donald Grybeck (U.S. Geological Survey)
Last report date 5/5/2005