Unnamed (lower Slate Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Hg
Gangue minerals carbonate; quartz

Geographic location

Quadrangle map, 1:250,000-scale BH
Quadrangle map, 1:63,360-scale D-2
Latitude 60.93
Longitude -159.93
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the southwest side of Slate Creek, about 4 miles upstream of the confluence of Slate Creek with the Tuluksak River. The map site is in the SW1/4 of sec. 21, T. 10 N., R. 60 W., of the Seward Meridian. It is locality 5 of Frost (1990).

Geologic setting

Geologic description

Frost (1990) reported that discontinuous lenses of silica-carbonate rock are present along the Golden Gate fault near where it crosses Slate Creek, an east tributary to the Tuluksak River (Box and others, 1993). Quartz and several generations of carbonate veins, in many cases enclosing relict fragments of serpentinite, make up the silica-carbonate rock. Samples from this locality (Frost, 1990, table 1, locality 5) contain 1.9 to more than 36 ppm Hg.
Geologic map unit (-159.932290023361, 60.9292669098557)
Mineral deposit model Silica-carbonate Hg (Cox and Singer, 1986; model 27c).
Mineral deposit model number 27c
Age of mineralization Not known. Postdates or accompanies deformation of the mid-Cretaceous Kuskokwim Group along the Golden Gate fault.
Alteration of deposit Quartz and carbonate replacement of serpentinite.

Production and reserves

Workings or exploration Reconnaissance surface observation and geochemical sampling has occurred at this site.
Indication of production None

References

MRDS Number 10307256
Reporters Travis L. Hudson
Last report date 3/24/2001