|Quadrangle map, 1:250,000-scale||TC|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The VW prospect is located just north along the ridge from the Peternie prospect (TC022), and it covers an area of about 2 square miles, centered at the coordinates above. The prospect occurs in sections 26 and 27, T. 23 N., R. 13 E., of the Copper River Meridian. There are two centers of prospecting, one in each section. The coordinates refer to the eastern location, and the other is approximately one mile away, in nearly the center of section 27, T. 23 N., R. 13 E., of the Copper River Meridian. The location is accurate within 1 to 2 miles.|
The mineralization at this prospect and at the Peternie prospect (TC022) consists of disseminated sulfide minerals in altered quartz monzonite and latite porphyry (Singer and others, 1976). These rocks intrude quartz-biotite schist, chlorite schist, muscovite schist, and quartz-biotite gneiss. This property shows broad areas of pervasive hydrothermal alteration, including well-developed silicification, secondary sericite and secondary pyrite. Propylitic alteration is not seen widely (Doyon Ltd., 1998). The intrusive rocks and alteration assemblages at VW are similar to those at the nearby Peternie prospect (TC022). Vein potassium feldspar at the Peternie prospect has a 40Ar/39Ar plateau age of 102.8 +/- 0.5 Ma (Newberry and others, 1996). It is likely that mineralization at the VW prospect formed at approximately the same time as mineralization at the Peternie prospect, but there are no age data for the VW prospect.The VW prospect is believed to be part of the same system as the Peternie (TC022) and North Peternie (TC020) prospects. Resource Associates of Alaska drilled 8 holes in the property in the 1970s and interpreted it as a Mo-Cu porphyry prospect. Soil samples have revealed low-level gold values (Doyon Ltd., 1998) IP line data suggest that the property is a porphyry Mo deposit (Doyon Ltd., 1998).
|Geologic map unit||(-142.834253216814, 63.7456586178872)|
|Mineral deposit model||Porphyry Mo deposit (Cox and Singer, 1986; model 21a)|
|Mineral deposit model number||21a|
|Age of mineralization||Vein potassium feldspar at the Peternie prospect has a 40Ar/39Ar plateau age of 102.8 +/- 0.5 Ma (Newberry and others, 1996). It is likely that mineralization at the VW prospect formed at approximately the same time as mineralization at the Peternie prospect, but there are no age data for the VW prospect.|
|Alteration of deposit||The prospect contains broad areas of pervasive hydrothermal alteration, including well-developed silicification, secondary sericite, and secondary pyrite (Doyon Ltd., 1998).|
|Workings or exploration||In the 1970s, Resource Associates of Alaska drilled 8 holes at the VW prospect. In 1979 WGM Inc. conducted a reconnaissance soil program for molybdenum. In 1980, Anaconda did airphoto analysis, selective rock geochemistry, and airborne magnetics interpretation. In 1981, Arctic Resources Inc. sampled a soil grid, and in 1982 Doyon Ltd. conducted prospecting traverses and did an IP resistivity line. In 1984, Doyon Ltd. conducted a brief prospect examination.|
|Indication of production||None|
Additional commentsThis property is located on Doyon Ltd. selected land. For more information, contact Doyon Ltd.
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.
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|