Vermont Dome

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Pb; Zn
Ore minerals copper sulfides; malachite; pyrite
Gangue minerals goethite; quartz

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale C-1
Latitude 67.5206
Longitude -150.2292
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the south ridge of Vermont Dome, about 0.5 mile south of the summit. Mulligan (1974) described the location as near the crest of the spur that extends southward from the summit of the Dome. The occurrence is at an elevation of about 3,550 feet on this spur. The location is accurate within one-half mile.

Geologic setting

Geologic description

Brosge and Reiser (1960) describe this occurrence as unidentified copper sulfides and malachite stains in Devonian phyllite and siltstone. Mulligan (1974) noted green-stained, light-brown float of quartz vein material with traces of copper, zinc, and iron sulfides, and tiny pods of goethite, along fracture planes in schist fragments found in talus. Eden (2000) collected samples, mostly float, of locally iron-stained quartz on the south side of Vermont Dome. One sample was weakly anomalous in Cu and another weakly anomalous in Pb. His mapping identifies the rocks in the area as Upper Devonian, gray-black phyllite and pelitic mica schist of the Beaucoup Formation. Kurtak and others (2002) report gem-quality quartz near this site.
Geologic map unit (-150.231953580246, 67.520174980159)
Alteration of deposit Iron oxides noted.

Production and reserves

Indication of production None

References

MRDS Number A011938

References

Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska: Final Report: U.S. Bureau of Land Management Technical Report 50, v. 1 and 2, 845 p.
Maas, K.M., 1987, Maps summarizing land availability for mineral exploration and development in northern Alaska, 1986: U.S. Bureau of Mines Open-File Report 10-87, 33 quadrangle overlays.
Reporters J.M. Britton (Anchorage)
Last report date 8/9/2002