Helpmejack Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale HU
Quadrangle map, 1:63,360-scale D-2
Latitude 66.9985
Longitude -153.5333
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer occurrence is located on Helpmejack Creek but its exact location is not known. The site is arbitrarily plotted 2.2 miles north of the northernmost of the Helpmejack Lakes in the SE1/4 section 35, T. 19 N., R 24 E. of the Kateel River Meridian.

Geologic setting

Geologic description

Mendenhall (1902) reports that colors of gold had been found on Helpmejack Creek, but that none of the prospects were rich enough to justify much time or money. In this area, the creek cuts across mafic volcanic rocks and phyllite that range in age from Devonian(?) to Cretaceous or Jurassic(?) (Patton and Miller, 1966). A recent, panned-concentrate sample from the creek contains 54 ppb Au, but no visible gold (Kurtak and others, 1999). No other information is available.
Geologic map unit (-153.536014862033, 66.9980075093218)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Prospecting, including sinking of shafts.
Indication of production None

References

MRDS Number A015592

References

Bottge, R.G., 1988, Maps summarizing land availability for mineral exploration and development in western Alaska, 1986: U.S. Bureau of Mines Open-File Report 14-88, 38 quadrangle overlays.
Heiner, L.E., and Wolff, E.N., eds., 1968, Mineral resources of northern Alaska, Final report, submitted to the NORTH Commission: University of Alaska, Mineral Industry Research Laboratory Report No. 16, 306 p.
Wyman, J.N., 1988, Journey to the Koyukuk: The photos of J.N. Wyman, 1898-1899: Missoula, Mont., Pictorial Histories Publishing Co., 128 p.
Reporters J.M. Britton (Anchorage)
Last report date 8/1/2002