|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||D-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Pinnell River is a major north-flowing tributary to Inmachuk River. This occurrence is on the east side of the Pinnell River valley, just above the Fairhaven ditch at an elevation of 750 feet. It is 1.8 miles south of Inmachuk River.|
Geologic descriptionA small orange gossan is developed in black dolomitic marble just above the Fairhaven ditch at an elevation of 750 feet. The marble is partially replaced by disseminations and stockwork veinlets of quartz and veinlets of fuchsite (Herreid, 1966). A gossan sample contained 0.02 ounces/ton Au, 0.023 ounces/ton Ag, 0.05 % Cu, 0.05 % Pb, 0.05 % Zn, and 0.5 % Cr (Herreid, 1966, Table 1). Most of the bedrock in the area is a metasedimentary schist and marble sequence of Lower Paleozoic age (Till and others, 1986).
|Geologic map unit||(-163.072694534584, 65.8593054077339)|
|Mineral deposit model||Vein and replacement in marble?|
|Age of mineralization||Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age. Some lode gold deposits on southern Seward Peninsula are mid-Cretaceous in age (see Midnight Mountain, BN047).|
|Alteration of deposit||The occurrence is oxidized and quartz veining of marble is present.|
|Workings or exploration||Small, hand dug prospecting pits may be present.|
|Indication of production||None|
Herried, G.H., 1966, The geology and geochemistry of the Inmachuk River map area, Seward Peninsula, Alaska: Alaska Division of Mines and Minerals Geological Report 23, 25 p., 1 sheet, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|