|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is 1.6 miles N 36 E of the Foster prospect (BN098). The Foster prospect is in the headwaters of a north tributary of Omilak Creek at an elevation of approximately 1,250 feet. Omilak Creek flows westward from headwaters in the northern Darby Mountains to the Fish River in McCarthy's Marsh.|
Geologic descriptionOxidized galena in soil and gossan material occurs with ubiquitous fragments of black phyllite in a prospect trench (Briskey, 1983). This is within a northwest-trending zone of iron-oxide staining that is traceable at the surface for 800 feet. Assays of 24 samples of material in the prospect trench contained 20 ppm to 6.8 % Pb, 25 ppm to 3.4 % Zn, 10 to 2,200 ppm Cu, and 0.2 to 1,850 ppm Ag. The average of these samples was 0.84 % Pb, 0.37 % Zn, 221 ppm Cu, and 320 ppm Ag. This mineralization is localized near the axis and along the west limb of a large northwest plunging syncline in high grade metasedimentary rocks (Till and others, 1986).
|Geologic map unit||(-162.532613938076, 65.0392950226131)|
|Mineral deposit model||Polymetallic vein or replacement in marble (Cox and Singer, 1986; model 19a or 22c). May be similar to Foster prospect (BN098).|
|Mineral deposit model number||19a or 22c|
|Age of mineralization||Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.|
|Alteration of deposit||Oxidation of sulfide minerals.|
|Workings or exploration||A small surface prospect trench is present here.|
|Indication of production||None|
Briskey, J.A., 1983, Summary of field observations on Seward Peninsula mineral deposits: U.S. Geological Survey, unpublished administrative report, 34 p.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|