Unnamed Occurrence (ARDF - TE106; near Igloo Creek), Port Clarence Mining District, Nome Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - TE106; near Igloo Creek)	- not defined -
Port Clarence Mining District	Mining District
Nome Census Area	Census Area
Alaska	State
USA	Country

A 1982 reconnaissance traverse on this ridge did not relocate this occurrence (Hudson, 1983).
Location: This occurrence is on the ridge crest between lower Igloo Creek (east tributary to the American River) and another (unnamed) east tributary to the the American River. The mouth of the unnamed east tributary is 4.25 miles north of the mouth of Igloo Creek. This occurrence is at a surface elevation of approximately 1,150 feet, 4.4 to 4.5 miles due east of the American River. The location is mapped by Sainsbury (1972) but it was not included by Cobb and Sainsbury (1972). Cobb (1975) refers to this location as 'Unnamed occurrence'.
Geology: Sainsbury (1972) notes the occurrence of tactite rubble and outcrop on this ridge. The mapped bedrock assemblage in this area is chlorite-epidote-amphibole schist with some intercalated metacarbonate rocks and local metamorphosed mafic intrusive bodies (Sainsbury, 1972). Partial results of a spectrographic analysis reported by Sainsbury (1972, p. 3) indicate that tactite here can contain greater than 1,000 ppm tin, 1,000 ppm beryllium, and greater than 1,000 ppm bismuth. No other data are available.
Workings: No prospecting activities are known to have taken place at this location.
Age: May be Late Cretaceous, the age of other tin-bearing mineralized systems of western Seward Peninsula.
Alteration: Calc-silicate minerals replacing metacarbonate rocks

Commodities (Major) - Sn
Development Status: None
Deposit Model: Tin-bearing skarn (Cox and Singer, 1986; model 14b)

Other Databases

Link to USGS - Alaska:	TE106

Other Regions, Features and Areas containing this locality

References