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

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Occurrence, Inactive

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Commodities and mineralogy

Main commodities Au
Other commodities Ag

Geographic location

Quadrangle map, 1:250,000-scale LC
Quadrangle map, 1:63,360-scale C-3
Latitude 60.52
Longitude -154
Nearby scientific data Find additional scientific data near this location
Location and accuracy 6.4 km W-NW of Portage Lake, in Sec. 15, T. 5 N., R. 27 W., of the Seward Meridian. Accurate within 500 meters.

Geologic setting

Geologic description

The only information is that the U.S. Bureau of Mines (1995) reported as a lode gold and silver deposit.
The bedrock in the vicinity of the occurrence is Tertiary volcanic rocks. The rocks of this unit include: rhyolitic breccia, ash-flow tuff, flows, and intrusive rocks and subordinate mafic to intermediate flows (Nelson and others, 1983, unit Tv). Potassium-argon ages for this unit (Tv) range from 56.2 to 62.7 m.y. indicating a Tertiary age for these rocks (Eakins and others, 1978).
Geologic map unit (-154.002240421484, 60.5193364488939)
Mineral deposit model Unknown
Age of mineralization Potassium-argon ages for unit Tv range from 56.2 to 62.7 m.y. (Eakins and others, 1978) indicating a Tertiary age for the host rocks to the mineralization.
Alteration of deposit Unknown

Production and reserves

Workings or exploration Unknown
Indication of production None
Reserve estimates No reserves
Production notes No production

Additional comments

MAS/MILS sequence number 0020930009 (Bureau of Mines, 1995). Site is in Lake Clark National Park and Preserve.

References

MRDS Number A106354

References

Eakins, G.R., Gilbert W.G., and Buntzen, T.K., 1978, Preliminary bedrock geology and mineral resource potential of west-central Lake Clark quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 118, 15 p., 2 plates, scale 1:25,000.
Nelson, W.H., Carlson, C., and Case, J.E., 1983, Geologic map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-A, 1 sheet, scale 1:250,000.
U.S. Bureau of Mines, 1995, Spatial data extracted from the Minerals Availability System/Minerals Industry Location System (MAS/MILS): U.S. Bureau of Mines Special Publication 12-95, CD-ROM.
Reporters D.P. Bickerstaff (USGS)
Last report date 6/15/1998