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North Peternie

Prospect, Active

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Commodities and mineralogy

Main commodities Pb
Other commodities Ag; Mo
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale TC
Quadrangle map, 1:63,360-scale C-4
Latitude 63.672
Longitude -142.869
Nearby scientific data Find additional scientific data near this location
Location and accuracy The North Peternie prospect is located north along the ridge from Peternie prospect (TC022), in section 22, T. 22 N., R. 13 E., of the Copper River Meridian. It covers an area of about 1 square mile. The coordinates correspond to the center of the prospect. It is 6 miles west of the West Fork of the Dennison Fork of the Fortymile River. The location is accurate.

Geologic setting

Geologic description

The North Peternie prospect is believed to be part of the same system as Peternie prospect (TC022) and VW prospect (TC030). They are all thought to be porphyry Mo deposits within quartz monzonite and latite porphyry intrusive rocks. The geology at the prospect consists of pyritic, granite intrusives (Foster, 1970). Potassium feldspar in a vein cutting the intrusion at Peternie has a 40Ar/39Ar age of 102.8 + / - 0.5 Ma (Newberry and others, 1996). The North Peternie prospect lies within the Y1 subterrane of the Yukon-Tanana terrane (Foster and others, 1994). Ridgeline soil samples at North Peternie show anomalous values of molybdenum and silver (Doyon Ltd., 1998).
Geologic map unit (-142.871250209814, 63.6716574923255)
Mineral deposit model Porphyry Mo (Cox and Singer, 1986; model 21a)
Mineral deposit model number 21a
Age of mineralization 40Ar/39Ar dates of potassium feldspar in a vein cutting the intrusive at the Peternie prospect (TC022) nearby yield an age of 102 Ma for the mineralization (Newberry and others, 1996).
Alteration of deposit Quartz monzonite and latite porphyry rocks are hydrothermally altered (Doyon Ltd., 1997).

Production and reserves

Workings or exploration Ridgeline soil has been sampled at the prospect.
Indication of production None

Additional comments

This property is located on Doyon Ltd. selected lands. For more information, contact Doyon Ltd.

References

MRDS Number 10308375

References

Doyon, Limited, 1998, Veta Prospects 1997 Volume 1: Doyon, Limited, unpublished report 98-10, 256 p. (Report held by Doyon, Limited, Fairbanks, Alaska.)
Foster, H.L., 1970, Reconnaissance geologic map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geological Investigations Map I-593, 1 sheet, scale 1:250,000.
Foster, H.L., Keith, T.E C., and Menzie, W.D., 1994, Geology of the Yukon-Tanana area of East-Central Alaska, in Plafker, G., and Berg, H.C., eds., The geology of Alaska: Geological Society of America, DNAG, The geology of North America, vol. G-1, p. 205-240.
Newberry, R.J., Layer, P.W., Burleigh, R.E., and Solie, D.N., 1996, New 40Ar/39Ar dates for intrusions and mineral prospects in the eastern Yukon-Tanana terrane, Alaska - Regional patterns and significance, in Gray, J.E., and Riehle, J.R., eds., Geological Studies in Alaska by the U.S. Geological Survey, 1996: U.S. Geological Survey Professional Paper 1595, p. 131-159.
Reporters C.E. Cameron (ADGGS)
Last report date 4/13/1999