Girl Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals cinnabar; gold; ilmenite; magnetite; scheelite

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale A-7
Latitude 61.22859
Longitude -158.44655
Nearby scientific data Find additional scientific data near this location
Location and accuracy Gold has been found on the upper part of Girl Creek for about 1.0 mile. The coordinates are at about the center of the occurrence at an elevation of about 1,000 feet in the SW 1/4 sec. 9, T. 13N., R. 51W., of the Seward Meridian. The occurrence is locality 36 of Miller and others (1989). The location is accurate.

Geologic setting

Geologic description

Cady and others (1955) cite reports of placer gold prospects on Girl Creek. The rocks in the area consist of shale and sandstone of the Upper Cretaceous, Kuskokwim Group, siliceous sedimentary rocks of the Mesozoic Gemuk Group;, and an extensive swarm of mafic to felsic dikes and sills similar to those associated with placer deposits in other parts of the Kuskokwim mineral belt (Bundtzen and Miller, 1997).
Girl Creek occupies a nearly straight, northeast-striking, steep-walled canyon that was mapped by Cady and others (1955) as a high angle fault, an interpretation confirmed by more recent mapping (M.L. Miller, D. Bradley, and T.K. Bundtzen, written communication, 2002). Massive slump blocks that occur along the canyon suggest that the Girl Creek fault has been active recently.
Panned concentrates from three sites along the the creek contain scheelite, abundant cinnabar, small grains of gold, magnetite, and ilmenite (T.K. Bundtzen, written communication, 1999). Sulfide-bearing tourmaline breccias was observed in outcrops along the north side of the Girl Creek canyon (T.K. Bundtzen and M.L. Miller, unpublished field data, 1999).
Geologic map unit (-158.448886056601, 61.2278754421767)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Undated, but probably Quaternary.

Production and reserves

Workings or exploration Surface prospecting took place prior to 1951 (Cady and others, 1955). In 1999, one of the compilers of this site (Bundtzen) collected three panned concentrate samples here.
Indication of production None