Unnamed (beach between Yahtse River and Yana Stream)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Ti
Ore minerals ilmenite; gold; magnetite; pyrite; rutile
Gangue minerals garnet; sphene; zircon

Geographic location

Quadrangle map, 1:250,000-scale IB
Quadrangle map, 1:63,360-scale D-1
Latitude 59.8301
Longitude -141.2154
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the present Gulf of Alaska shoreline between the mouths of the Yana Stream and Yahtse River. It is one-half mile southeast of USGS benchmark Grit and 1.75 miles northwest of USGS benchmark Yahtse. The occurrence, in the northeast corner of section 24, T. 24 S., R. 24 E., of the Copper River Meridian, is locality 7 of Cobb (1972 [MF 411]; 1979 [OF 79-1246]).

Geologic setting

Geologic description

Thomas and Berryhill (1962) collected an auger sample of beach gravel at this location that contained 0.7 pound of titanium oxide per cubic yard in the magnetic fraction and 0.6 pound of iron and 4.7 pounds of titanium oxide per cubic yard in the non-magnetic fraction. It also contained a trace of gold. Beach sands along this segment of the Gulf of Alaska shoreline contain trace amounts of ilmenite, magnetite, rutile, pyrite, garnet, sphene, and zircon (Thomas and Berryhill, 1962).
Geologic map unit (-141.217117372006, 59.8297065256394)
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 (Thomas and Berryhill, 1962).
Indication of production None

References

MRDS Number 10307625
Reporters Travis L. Hudson
Last report date 12/12/2001