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Unnamed Occurrence (ARDF - KC169), Hassler Lake, Annette Island, Ketchikan District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA

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Location: This occurrence is at an elevation of about 600 feet on a small knoll, 0.1 mile due west of the southwest corner of Hassler Lake. The site is in sections 18, 19, T. 77 S., R. 93 E., of the Copper River Meridian. It corresponds to loc. 17 in Karl (1992). The location is accurate within 0.1 mile.
Geology: The country rock in the area of this site is Silurian trondhjemite that locally is sheared and sericitized, probably owing to Upper Cretaceous, greenschist-grade regional metamorphism (Berg, 1972 [I 684]). The occurrence consists of sparse base-metal sulfide mineralization in the trondhjemite, and is based on a sample of trondhjemite containing Cu-Pb-Zn sulfide minerals collected by a road construction crew in 1990 (Karl, 1992, loc. 17).
Alteration: Local sericitization of trondhjemite country rock.

Commodities (Major) - Cu, Pb; (Minor) - Zn
Development Status: None
Deposit Model: Disseminated sulfide minerals in trondhjemite.

Mineral List



3 entries listed. 3 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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. Karl, S.M., 1992, Map and table of mineral deposits on Annette Island, Alaska: U.S. Geological Survey Open-File Report 92-690, 57 p., 1 map, scale 1:63,360.

 
Mineral and/or Locality  
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