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Texas Discovery

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Au; Cu; Pb
Ore minerals chalcopyrite; galena; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.064
Longitude -130.197
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Texas Discovery occurrence is in Section 13 at approximately 2000 feet elevation. It is just above the old wagon road that follows the West Fork of Texas Creek, and about 2.3 miles below the outlet of Texas Lake (Elliott and Koch, 1981, p. 14, loc. 48). The location probably is accurate within about a quarter of a mile.

Geologic setting

Geologic description

The country rock in the area of this occurrence is Triassic Texas Creek Granodiorite, which regionally underlies and locally intrudes pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group (Smith, 1977, Koch, 1996).
The deposit (Buddington, 1925, p. 74; Elliott and Koch, 1981, loc. 48) consists mainly of a quartz fissure vein 1-14 inches thick in granodiorite. The vein contains galena, pyrite, pyrrhotite, and minor chalcopyrite. An assay of a picked sample of this vein reportedly showed 30 percent Pb, about 1.06 oz Au per ton, and a little silver. A nearby quartz stringer 4 inches thick contains galena and chalcopyrite (Buddington, 1929, p. 98).
Geologic map unit (-130.198705272901, 56.0636941086032)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c

Production and reserves

Workings or exploration An early assay of a picked sample of the main vein reportedly showed 30 percent Pb, about 1.06 oz Au per ton, and a little silver.
Indication of production None

Additional comments

Occurrence was originally staked in 1923.

References

MRDS Number A010282

References

Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p., 1 plate.
Reporters H. C. Berg (Fullerton, California)
Last report date 5/17/1998