|Quadrangle map, 1:250,000-scale||SO|
|Quadrangle map, 1:63,360-scale||D-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at about 1,250 feet elevation on the southeast side of Peak 1408. It is 4.2 miles northwest of Mt. Kachauik and probably located within 0.25 mile. This is locality 69 of Gamble (1988).|
Geologic descriptionThis occurrence is along the north contact of the Kachauik pluton with schistose Ordovician chlorite marble (Till and others, 1986). The plutonic rock at this location is described as a hybrid diorite with abundant biotite (Till and others, 1986). Other parts of the Kachauik pluton to the south are leucocratic, granodiorite to quartz monzonite (Miller and others, 1972). A composite sample of iron-stained intrusive rocks and fluorite-bearing calc-silicate hornfels contained 100 ppm W and 20 ppm Be (Gamble, 1988). The Kachauik pluton is mid-Cretaceous; a K/Ar date for the pluton is 86.1 +/- 3 Ma (Miller and others, 1972).
|Geologic map unit||(-162.906599544455, 64.8242815821725)|
|Mineral deposit model||W skarn (Cox and Singer, 1986; model 14a).|
|Mineral deposit model number||14a|
|Age of mineralization||Mid-Cretaceous; a K/Ar date for the Kachauik pluton is 86.1 +/- 3 Ma (Miller and others, 1972).|
|Alteration of deposit||Calc-silicate minerals are developed in the impure marble country rocks adjacent to the Kachauik pluton. Oxidation of iron-bearing minerals in the intrusive rocks is indicated by iron-oxide staining.|
|Workings or exploration||No workings or exploration acitivities are known but regional stream sediment geochemistry and airborne radiometric surveys may have been completed in the area.|
|Indication of production||None|
Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.
Miller, T.P., Grybeck, D.J., Elliott, R.L., and Hudson, T.L., 1972, Preliminary geologic map of the southeastern Bendeleben and eastern Solomon quadrangles, eastern Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 72-256, 11 p., 1 sheet, scale 1:250,000.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||8/19/1999|