Unnamed (southwest of Mt Dagelet)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ni
Other commodities Cu
Ore minerals limonite; ni-cu bearing sulfides

Geographic location

Quadrangle map, 1:250,000-scale MF
Quadrangle map, 1:63,360-scale C-4
Latitude 58.585
Longitude -137.228
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is on the south wall of a glacier about 2.6 miles at 248 degrees (true azimuth) from Mt. Dagelet in extremely rugged country. Rossman (1963, p. F44) reported this locality as a prominent gossan similar to those observed over nickel-copper deposits on Yakobi Island in the Sitka D8 quadrangle (also see MF002). The gossan was not examined on the ground either by Rossman or, in 1977, by the U.S. Bureau of Mines (Kimball and others, 1978, p. C110-111). The location is probably within 0.2 mile of Rossman's observed gossan.

Geologic setting

Geologic description

Gossan similar to that observed at the Yakobi Island nickel-copper deposits on the Sitka D-8 quadrangle was observed remotely by Rossman (1963). The site is in the Crillon-LaPerouse layered mafic-ultramafic pluton within about 0.3 mile of its southwestern contact with biotite-hornblende schist (Brew and others, 1978).
Geologic map unit (-137.229929129938, 58.5846337662022)
Mineral deposit model Magmatic segregation.
Age of mineralization Tertiary.
Alteration of deposit Prominent iron-rich gossan.

Production and reserves

Workings or exploration Surface exposures, not examined on the ground.
Indication of production None

Additional comments

The site is in Glacier Bay National Park and Preserve.

References