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  3. Alaska Resource Data File (ARDF)

Unnamed (near Natzuhini Bay)

Occurrences, Active?

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Commodities and mineralogy

Main commodities Cu
Ore minerals azurite; chalcopyrite; malachite

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale B-3
Latitude 55.28988
Longitude -132.81187
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in a borrow pit about 0.8 mile northeast of the head of Natzuhini Bay. It is about 0.5 mile southwest of the center of section 9, T. 76 S., R. 83 E.

Geologic setting

Geologic description

At this site, two samples from an outcrop in a borrow pit contained 1,034 and 3,813 parts per million copper (Hedderly-Smith, 1999 [Inventory]). The rocks in the pit consist of chlorite-sericite schist with disseminated pyrite and chalcopyrite; they are part of the Wales Group of Cambrian and older age. Hedderly-Smith also cites a report from workers at a nearby logging camp of a 'copper vein' on a road about 1,200 feet or more to the south. The vein is said to be 4 to 6 inches thick and stained with malachite and azurite.
Geologic map unit (-132.813514235303, 55.2895278073969)
Age of mineralization Unknown other than that the occurrence is in rocks of the Wales Group of Late Proterozoic and Cambrian age.

Production and reserves

Workings or exploration Only sampling in a borrow pit.
Indication of production None

Additional comments

These occurrences are on land that has been conveyed to the Sealaska Corporation who hold the surface and subsurface rights, or the land is under application for transfer to them.

References

References

Hedderly-Smith, D.A., 1990, Report of the 1989 field season - Sealaska Mineral Reconnaissance Project: Sealaska Corporation, 58 p. (Unpublished report held by the Sealaska Corporation, Juneau, Alaska.)
Hedderly-Smith, D.A., 1999, Inventory of metallic mineral prospects, showings and anomalies on Sealaska lands, 1988 through 1998: Sealaska Corporation, Juneau, Alaska, 217 p. (internal report held by Sealaska Corporation, Juneau, Alaska).
Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004