Unnamed (north side of North Fork, Mosquito Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Sb; Zn
Other commodities Cu; Pb

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale A-2
Latitude 65.07
Longitude -162.65
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the north side of North Fork, Mosquito Creek at an elevation of approximately 1,250 feet. Mosquito Creek flows westward from headwaters in the northern Darby Mountains to Telephone Creek, a tributary to Fish River in McCarthy's Marsh. This location approximates sample locality 7 of Miller and Grybeck (1973). It is location 52 of Gamble (1988).

Geologic setting

Geologic description

Miller and Grybeck (sample 7, 1973) collected a grab sample of gossan developed at a marble/schist contact at this locality. This sample contained 7,000 ppm As, 700 ppm Cu, 70 ppm Mo, 3,000 ppm Pb, 10,000 ppm Sb, and 10,000 ppm Zn. These occurrences are in Lower Paleozoic or Precambrian high grade metasedimentary rocks (Till and others, 1986).
Geologic map unit (-162.652618262864, 65.0692937520853)
Mineral deposit model Sulfide veins and/or replacements in carbonate rocks
Age of mineralization Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.
Alteration of deposit This is an oxidized gossan zone.

Production and reserves

Workings or exploration None are known, some shallow hand dug prospecting pits may be locally present in this area.
Indication of production None

References