|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||A-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is in bedrock exposures along upper Ophir Creek (BN099) about 3.4 miles upstream of its confluence with Crooked Creek. This is at the confluence of upper Ophir Creek and Flat Creek. It is locality 77 of Gamble (1988). As shown by Gamble (1988), it is just upstream of old placer mine workings (BN106).|
Geologic descriptionGamble (1988) reports that a calcite vein in marble contains 0.25 ppb gold at this locality. Bedrock exposures are limited in this area; this occurrence may be close to a regional contact between lower Paleozoic mafic metavolcanic and metasedimentary assemblages (Till and others, 1986).
|Geologic map unit||(-163.694628246178, 65.0572752932365)|
|Mineral deposit model||Calcite vein in marble|
|Age of mineralization||Cretaceous ?; epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily Cretaceous in age.|
|Alteration of deposit||Calcite veining.|
|Workings or exploration||No workings or exploration activities are known at this locality.|
|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.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|