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

Unnamed (near Hassler Harbor)

Occurrence, Undetermined

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite

Geographic location

Quadrangle map, 1:250,000-scale KC
Quadrangle map, 1:63,360-scale A-5
Latitude 55.204
Longitude -131.414
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 100 feet, on the southwest side of the midpoint of the divide between Hassler Harbor and Cascade Inlet. The site is in section 9, T. 77 S., R. 93 E., of the Copper River Meridian. It corresponds to loc. 11 in Berg (1972 [I 684]), loc. 138 in Elliott and others (1978), and loc. 16 in Karl (1992). The location is accurate within a few hundred feet.

Geologic setting

Geologic description

The country rock at this site is Silurian trondhjemite that was regionally metamorphosed to greenschist grade in Late Cretaceous time (Berg, 1972). The occurrence consists of chalcopyrite sparsely disseminated in sheared and sericitized trondhjemite (Berg, 1972, loc. 11).
Geologic map unit (-131.415683417758, 55.2036568881269)
Mineral deposit model Disseminated sulfide deposit in trondhjemite.
Alteration of deposit Trondhjemite hostrock is sericitized.

Production and reserves

Indication of production None

References

MRDS Number A012381

References

Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360.
Elliott, R.L., Berg, H.C., and Karl, S.M.,1978, Map and table describing metalliferous and selected non-metalliferous mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-73B, 17 p., 1 sheet, scale 1:250,000.
Reporters H.C. Berg, USGS
Last report date 7/6/1999