Unnamed (north end of Divide Head)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale A-1
Latitude 55.24092
Longitude -132.24498
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at the north end of Divide Head about 0.7 mile southwest of Sunny Point; it is about 0.4 mile north-northeast of the center of section 31, T. 76 S., R. 87 E.

Geologic setting

Geologic description

A 2- to 5-inch-thick quartz vein(?) with pyrite and chalcopyrite is along a suspected shear zone. The vein is conformable to the bedding of the limestone host rock, which is part of the Wales Group of Late Proterozoic and Cambrian age (Hedderly-Smith, 1999 [Inventory]). A sample contained 4.97 percent copper, 5.4 parts per million silver, and 119 parts per billion gold.
Geologic map unit (-132.246652784088, 55.2405621985063)
Mineral deposit model Quartz vein? with chalcopyrite.

Production and reserves

Workings or exploration Only limited surface sampling.
Indication of production None

References

References

Hedderly-Smith, D.A., 1992, Report of the 1991 field season - Sealaska Mineral Reconnaissance Project: Sealaska Corporation, 2 vols., 225 p. 23 plates. (Unpublished report held by the Sealaska Corporation, Juneau, Alaska.)
Hedderly-Smith, D.A., 1993, Report of the 1992 field season-Sealaska minerals reconnaissance project: Sealaska Corporation, 60 p. (Unpublished report held by the Sealaska Corporation, Juneau, Alaska.)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