Shannon

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Au; Co; Zn

Geographic location

Quadrangle map, 1:250,000-scale SK
Quadrangle map, 1:63,360-scale B-4
Latitude 59.37
Longitude -136.35
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 4,500 feet on the north slopes of Flower Mountain, approximately 1.3 miles, N39E from the summit. It is in the NE1/4, section 8, T. 29 S., R. 54 E. of the Copper River Meridian. It is shown as location M by Gilbert and Redman (1989) and number 16 on sheet 1 by Still and others (1991).

Geologic setting

Geologic description

According to Still and others (1991), the Shannon prospect is a small iron-stained lens of grossularite garnet-sulfide-magnetite skarn discovered in 1987 by Merrill Palmer . Selected high-grade samples from this lens contained up to 0.068 ppm gold, 1.3 ppm silver, 600 ppm zinc, 3,400 ppm copper, and 245 ppm cobalt (Gilbert and others, 1991). The host rocks for this prospect are Paleozoic to early Mesozoic mafic volcanics and sediments near an apophysis of Cretaceous quartz diorite to granodiorite that extends to the northeast from Flower Mountain (MacKevett and others, 1974). The skarn and mineralization are probably related to this intrusive body, thus are probably Cretaceous.
Geologic map unit (-136.351864251027, 59.3696636660915)
Mineral deposit model Copper skarn (Cox and Singer, 1986; model 18b).
Mineral deposit model number 18b
Age of mineralization Probably Cretaceous based on the age of the nearby intrusive rocks (MacKevett and others, 1974).
Alteration of deposit Skarn.

Production and reserves

Indication of production None

References