|Quadrangle map, 1:250,000-scale||TC|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Dennis Ladue prospect is an area of about 8 square miles. The latitude and longitude correspond to approximately the center of the property. The prospect covers most of sections 11-15 and 21-36, T. 19 N., R. 16 E., of the Copper River Meridian. The location is accurate.|
Geologic descriptionThe Dennis Ladue prospect is underlain by granite, syenite, aplite and porphyritic rhyolite phases of a composite felsic stock. This stock intrudes chlorite schists, biotite schists, and quartzite. The alteration at the property is structurally controlled, and shows evidence of intense silicification within the granite and the rhyolite (DiMarchi and others, 1989). Quartz veins and vein breccia follow north-trending shoots; the veins have traces of pyrite and tourmaline (DiMarchi and others, 1989). The prospect lies within the eastern portion of the Y1 subterrane of the Yukon-Tanana terrane (Foster and others, 1994). In 1995, a re-analysis of WGM Inc. soil and silt samples by Doyon Ltd. revealed anomalous values of tungsten, silver, gold, antimony, arsenic, barium, molybdenum, and zinc.
|Geologic map unit||(-142.274231795272, 63.4186636717718)|
|Mineral deposit model||Epithermal Au/Ag/W, distal to porphyry? (Doyon Ltd., 1998)|
|Alteration of deposit||Alteration at the prospect consists of intense silicification within the granite and rhyolite (DiMarchi and others, 1989).|
|Workings or exploration||In 1975, WGM Inc. conducted a stream silt reconnaissance program on the property, and in 1981 Arctic Resources Inc. analyzed ridgeline soils. In 1985, Doyon Ltd. reanalyzed the silt and soils that contained greater than 20 ppb gold. In 1989 Central Alaska Exploration Corp. did mapping as well as rock, soil, and stream sediment sampling. In 1991, Central Alaska Gold Company conducted rock and soil sampling for gold mineralization.|
|Indication of production||None|
Additional commentsThis property lies within Doyon Ltd. selected lands. For more information, contact Doyon Ltd.
DiMarchi, J.J., Flanders, R.W., Freeman, L.K., Puchner, C.K., Rohtert, W.R., Stubbs, G.S., and Tolbert, R.S., 1990 (1989), 1989 annual report, Alaska field operations, volume 1: Central Alaska Exploration Corporation, 203 p. (Report held by Doyon, Limited, Fairbanks, Alaska)
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.
|Reporters||C.E. Cameron (ADGGS)|
|Last report date||4/13/1999|