MM

Occurrence, Active

Commodities and mineralogy

Main commodities Au; Cu
Ore minerals chalcopyrite; gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TC
Quadrangle map, 1:63,360-scale A-4
Latitude 63.13
Longitude -143.0027
Nearby scientific data Find additional scientific data near this location
Location and accuracy The MM prospect is about 5.0 miles southeast of VABM 3345 'Tetlin' and about 9.4 miles west-northwest of the center of Tetlin Lake. The prospect is centered about 0.5 mile northwest of the center of section 32, T. 16 N., R. 13 E., of the Copper River Meridian. The location is accurate to within one mile or less from the center of the deposit.

Geologic setting

Geologic description

There is little published specific information about the MM prospect other than it is a prospect composed of phyllite and schist, located at the Tetlin Project, currently operated by Contango ORE Inc. The prospect contains multiple magnetic and conductivity highs corresponding to anomalous surface geochemistry (Freeman, 2014).
The Tetlin project 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. 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 (Illig, 2014).
The Tetlin project is located within the prolific Tintina Gold Belt (+200 million ounces of resource) and is prospective for mid-Cretaceous intrusive-related gold deposits. The project also is cut by a younger, northeast striking belt of porphyry copper–gold deposits which have remained virtually unexplored since their discovery in the early 1970s (Illig, 2014).
Geologic map unit (, )
Mineral deposit model Insufficient data to assign.
Age of mineralization Undetermined, but proximal to the Peak deposit, a massive sulfide distal skarn mineralization, which has been dated to 70 million years old (Illig, 2014).
Alteration of deposit Not described.

Production and reserves

Workings or exploration
In 2008, Contango ORE Inc. signed the lease with Tetlin Village, also acquiring and analyzing remote sensing data. In 2009, the first reconnaissance program was conducted, followed by soil sampling and trenching. In 2010, the field program entailed prospecting, stream sediment, and a pan concentrate program, and a focused basal soil sampling and IP surveys. In 2011, the basal soil sampling was continued, in addition to airborne magnetic and resistivity surveying (Freeman, 2014).
MM was identified through pan-stream sampling, soil sampling, and airborne geophysics. The prospect contains multiple magnetic and conductivity highs that correspond to anomalous surface geochemistry (Freeman, 2014).
Indication of production None
Reserve estimates None.
Production notes None.

References

References

Freeman, C., 2014, Geology and Mineralization of the Peak Zone Au-Cu-Ag Deposit, Tetlin Project, Alaska, for Avalon Development Corp and Contango ORE Inc., http://www.avalonalaska.com/CordRoundup-Tetlin_Summary-26Jan14_noTTF-Final.pdf (as of June 3, 2014).
Illig, P., 2014, Alaska's Newest Gold Deposit: Mineralization and geochemistry of the Peak Zone Distal Gold Skarn,Ttetlin Project, Tok, Alaska, Avalon Development Corporation: http://www.contangoore.com/presentations/Illig-spring_2014-AMA-final-lowres.pdf (as of June 4, 2014).
Reporters V.C. Zinno (Alaska Earth Sciences, Inc.)
Last report date 12/15/2014