Unnamed Occurrence (ARDF - BN095; headwaters of North Fork; Mosquito Creek), Council Mining District, Nome Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - BN095; headwaters of North Fork; Mosquito Creek)	- not defined -
Council Mining District	Mining District
Nome Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is on the ridge crest (approximate 1,850 feet elevation) on the north side of the headwaters of North Fork, Mosquito Creek. Mosquito Creek flows westward from headwaters in the northern Darby Mountains to Telephone Creek, a tributary to Fish River in McCarthy's Marsh. It is approximately the location of sample localities 5 and 6 of Miller and Grybeck (1973). Gamble (1988) showed these as locations 50 and 51.
Geology: Two samples of apparently small, iron-stained zones in metamorphosed carbonate rocks were collected by Miller and Grybeck (1973) near this location. A composite grab sample of iron-stained carbonate contained 70 ppm Ag, 2,000 ppm As, 0.1 ppm Au, 200 ppm Cu, greater than 20,000 ppm Pb, 700 ppm Sb, 500 ppm Sn, and 7,000 ppm Zn. A grab sample of gossan in calcareous metasedimentary rock contained 3 ppm Ag, 3,000 ppm As, 200 ppm Cu, 70 ppm Mo, 1,500 ppm Pb, and greater than 10,000 ppm Zn. These occurrences are in lower Paleozoic metasedimentary rocks (Till and others, 1986).
Workings: None are known, some shallow hand dug prospecting pits may be locally present in this area.
Age: Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.
Alteration: These occurrences are oxidized, gossanous zones in metacarbonate rocks.

Commodities (Major) - Ag, Pb, Zn; (Minor) - Sb, Sn
Development Status: None
Deposit Model: Sulfide veins and/or replacements in carbonate rocks

Other Databases

Link to USGS - Alaska:	BN095

Other Regions, Features and Areas containing this locality

References