|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Esperanza Creek is a south tributary to Goodhope River. This location is very approximate and is arbitrarily chosen on the lower part of the creek at an elevation of 250 feet, 3.1 miles north of the continental divide. It is locality 55 of Cobb (1972; MF 417; 1975; OFR 75-429).|
Geologic descriptionGold was discovered on Esperanza Creek in 1907-1908 (Smith, 1909). Gold is present in the narrow main channel where gravels are exposed between muck banks. The exact location of this discovery and the small amount of mining is not known. It is assumed to be along the lower part of the creek where the stream valley is narrow. There is extensive surficial cover in this area and bedrock, exposed locally on uplands, is mostly part of a schistose impure marble assemblage of probable Paleozoic age (Sainsbury, 1975; Till and others, 1986). At least part of this bedrock assemblage is probably equivalent to Ordovician impure marble known elsewhere on Seward Peninsula (Till and others, 1986). Quaternary/Tertiary basalt flows locally cap the valley walls in this area.
|Geologic map unit||(-163.802698966009, 65.7992920208833)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Small surface placer mine workings are probably present; probably mostly accomplished by hand.|
|Indication of production||Yes; small|
Cobb, E.H., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.
Sainsbury, C.L., 1975, Geology, ore deposits, and mineral potential of the Seward Peninsula, Alaska: U.S. Bureau of Mines Open-File Report 73-75, 108 p., 3 sheets, scale 1:250,000.
Smith, P.S., 1909, Recent developments in southern Seward Peninsula: U.S. Geological Survey Bulletin 379-F, p. 267-301.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|