This property is located on Doyon Ltd. selected lands. For more information, contact Doyon Ltd.
Location: 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.
Geology: 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).
Workings: Ridgeline soil has been sampled at the prospect.
Age: 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: Quartz monzonite and latite porphyry rocks are hydrothermally altered (Doyon Ltd., 1997).

Commodities (Major) - Pb; (Minor) - Ag, Mo
Development Status: None
Deposit Model: Porphyry Mo (Cox and Singer, 1986; model 21a)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Molybdenum

ⓘ Silver

Mineral List

ⓘ Pyrite

1 valid mineral.

Detailed Mineral List:

ⓘ Pyrite

Formula: FeS₂

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂

List of minerals for each chemical element

S	Sulfur
S	ⓘ Pyrite	FeS₂
Fe	Iron
Fe	ⓘ Pyrite	FeS₂

Other Databases

Link to USGS - Alaska:	TC020

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

North America PlatformPassive Margin
Yukon-Tanana lower DomainDomain

USA

Alaska
- Fortymile Mining DistrictMining District

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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.

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