Mt. Dutton

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Au; Pb; Zn
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale CB
Quadrangle map, 1:63,360-scale A-1
Latitude 55.1667
Longitude -162.2567
Nearby scientific data Find additional scientific data near this location
Location and accuracy Approximate location is about 4 km south of the summit of Mt. Dutton. Probably same location as anomaly no. 57 of Christie (1974), described as 2 mi (3.2 km) due north of King Cove landing strip. Also, no. 10 of MacKevett and Holloway (1977, p. 9).

Geologic setting

Geologic description

Two color anomalies 200 by 400 ft and 3,000 by 1,200 ft (60 by 120 and 900 by 360 m) in hornfelsed volcanic rocks cut by rare diorite dikes (Christie,1974). Pyrite content (0 to 8 percent) is highest in fractured rocks, although most pyrite is disseminated rather than fracture-controlled. Diorite dikes are only weakly altered and are not mineralized. Butherus and others (1979) reported that the color anomalies south and east of Mt. Dutton consist of altered, pyritic andesite containing quartz and calcite veins.
Geologic map unit (-162.258731821789, 55.1658246544652)
Mineral deposit model Porphyry copper, polymetallic vein, epithermal gold vein
Mineral deposit model number 17, 22c, 25
Age of mineralization Miocene or younger
Alteration of deposit Christie (1974) reported contact metamorphic effects and weak propylitic alteration.

Production and reserves

Workings or exploration Christie (1974) reported brief reconnaissance geologic mapping and collected silt samples, none of which showed any anomalies in copper, molybdenum, zinc, silver, or gold. Butherus and others (1979) reported rock and pan concentrate samples slightly anomalous in copper (130 ppm), lead (300 ppm), zinc (600 ppm), and silver (3.2 ppm).
Indication of production None

Additional comments

Reported quartz veining (Butherus and others, 1979) lsuggests possibility of epithermal gold vein or polymetallic vein type mineral deposits.

References

MRDS Number A106061

References

Butherus, D.L, Gressitt, E.E., Pray, J., Corner, N.G., Lindberg, P.H., and Fankhauser, R.E., 1979, Exploration and evaluation of the Aleut Native Corporation lands; Volume III: Resource Associates of Alaska, 69 p. 90 sheets, various sacales. (Report held by the Aleut Native Corporation, Anchorage, Alaska.)
Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Reporters G.D. DuBois, F.H. Wilson
Last report date 5/9/1994