Tors

Prospect, Active

Commodities and mineralogy

Main commodities Ag; Au; Cu
Other commodities Bi; Co; Cd; Mo; Ni; Sb; Sn; Te; W; Zn
Ore minerals arsenopyrite; chalcopyrite; bismuth; galena; gold; pyrargyrite; pyrite; pyrrhotite
Gangue minerals amphiboles; calcite; chlorite

Geographic location

Quadrangle map, 1:250,000-scale TC
Quadrangle map, 1:63,360-scale A-4
Latitude 63.186
Longitude -142.7819
Nearby scientific data Find additional scientific data near this location
Location and accuracy Tors is a prospect is about 3.5 miles east of VABM 3345 'Tetlin' and about 6.6 miles north of the center of Tetlin Lake. The prospect is centered about 0.4 mile north-northwest of the center of section 9, T. 16 N., R. 14 E., of the Copper River Meridian. The location is accurate to within about 2.5 miles.

Geologic setting

Geologic description

The Tors prospect is part of the Tetlin Project (Freeman, 2014a), which is located in Precambrian to Paleozoic greenschist to amphibolite-grade metamorphic rocks of the Yukon-Tanana Terrane intruded by Cretaceous to Tertiary felsic and intermediate plutonic bodies (Foster, 1970). District and regional scale northeast and northwest trending faults are present on the project and are often associated with gold and copper mineralization in this terrane (Freeman, 2014b).
The Tors prospect is located within the Tintina Gold Belt and also is cut by a younger, northeast striking mineralization belt called the Carmacks Porphyry Belt (Freeman, 2014a).
The Tors prospect is characterized by multiple magnetic and conductivity highs and anomalous surface geochemistry (Freeman, 2014a). This understanding was the result of a soil geochemistry survey and aeromagnetic survey from field work in 2013 (Illig, 2014; Freeman, 2014a).
Geologic map unit (, )
Mineral deposit model Skarn? (Cox and Singer, 1986; model 18b).
Mineral deposit model number 18b?
Age of mineralization 70 million years old, Cretaceous, according to U/Pb radioisotope dating techniques, if similar age to Peak Zone prospect (Illig, 2014).
Alteration of deposit Chlorite and amphibole alteration is associated with gold and silver mineralization (Illig, 2014).

Production and reserves

Workings or exploration In 2008, Contango ORE, Inc. signed the lease with Tetlin Village and began acquiring and analyzing remote sensing data in the area. Surface work began in the summer of 2009. In 2011, an airborne magnetic and resistivity survey was completed over Tors. In 2013, Contango conducted another airborne magnetic and resistivity survey and the first soil sampling over Tors was then completed (Van Treeck, 2013). The geophysical anomaly at Tors is similar to the response found at the Peak Zone (Van Treeck, C.J., Senior Geologist, Avalon Development Corp., written communication, 2014).
Indication of production None

Additional comments

In 2008, Contango ORE, Inc. signed a lease with Tetlin Village to control mineral rights on about 675,000 acres of fee simple land leased from the Tetlin Village(Freeman, 2014b).

References

References

Reporters V.C. Zinno (Alaska Earth Sciences, Inc.)
Last report date 3/15/2016