Crystal Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Ti
Other commodities Cr
Ore minerals chromite; ilmenite; gold; magnetite; rutile
Gangue minerals garnet; sphene; xenotime; zircon

Geographic location

Quadrangle map, 1:250,000-scale IB
Quadrangle map, 1:63,360-scale D-2
Latitude 59.9783
Longitude -141.6676
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is along the logging road west of Icy Bay. It is 1 mile northwest of the Icy Bay landing strip, near where the logging road parallels Crystal Creek and crosses the west boundary of section 28, T. 22 S., R. 22 E., of the Copper River Meridian. It is sample locality 152 of Foley and others (1995). The map location is probably accurate to within one-half mile.

Geologic setting

Geologic description

Foley and others (1995) collected one sample at this location. It is probably from a raised beach on a Holocene marine terrace. Spiral concentrate from this sample contained less than 0.028 gram of gold per ton, 0.52 percent titanium, and 230 ppm zirconium. Thomas and Berryhill (1962) collected reconnaissance beach samples (IB004, IB006-010) from the Icy Bay area that contained trace to small amounts of magnetite, ilmenite, chromite, zircon, rutile, garnet, sphene, xenotime, and gold. The magnetic fraction of their samples contained as much as 6.2 pounds of iron and 1 pound titanium oxide per cubic yard. The non-magnetic fraction contained as much as 6.4 pounds, but mostly less than 2 pounds, of titanium oxide per cubic yard.
Geologic map unit (-141.669374540969, 59.9778738546464)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a - beach).
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration Reconnaissance characterization of beach samples has been completed in this area.
Indication of production None

References

Reporters Travis L. Hudson
Last report date 12/12/2001