East Eva

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Pb

Geographic location

Quadrangle map, 1:250,000-scale EA
Quadrangle map, 1:63,360-scale A-5
Latitude 64.1378
Longitude -143.1139
Nearby scientific data Find additional scientific data near this location
Location and accuracy The East Eva lode prospect is on a ridge east of the headwaters of Norvell Creek about 1 mile east of hill 4855. The coordinates are the appproximate center of the prospect ,in section 8, T. 27 N., R. 12 E., of the Copper River Meridian. The location is accurate to within 1 mile. The East Eva prospect is located within Doyon, Ltd. selected or conveyed land.

Geologic setting

Geologic description

The East Eva prospect is associated with an elongate, northeast-trending, hornfelsed roof pendant composed of Paleozoic schist, quartzite, and marble that have been intruded by the Mount Veta syenite (WGM Inc., 1998 [DLR 98-10]). This syenite has a hornblende K-Ar age of 177 +/- 5 Ma (Foster, 1976). Mineralization is confined to a sulfide-bearing zone about 1 foot wide within the hornfels. A zone of moderately intense propylitization within syenite and quartzite did not contain anomalous precious or base metals; it was concluded that this mineralization is contact related and very limited in extent (WGM Inc., 1998 [DLR 98-10]). Rock samples collected at the East Eva Creek prospect in 1990 contain as much as 1,420 ppb gold, 10.8 ppm silver, and 7,365 ppm copper. Other rock-chip samples contain as much as 0.01 ounce of gold per ton, 15 ounces of silver per ton, 15 percent zinc, 7 percent lead, and 0.42 percent copper. Several other base-metal prospects are spatially associated with the Mount Veta intrusive complex, including Eva Creek (EA099), Oscar (EA096), Oscar West (EA097), Little Enchilada (EA103), unnamed (north of Fish Creek) (EA062), Molly Creek (EA100), Little Whiteman Creek (EA060), and Mitchell (EA101).
Central Alaska Exploration Corp. conducted mapping and rock sampling in the East Eva prospect area in 1989, and Central Alaska Gold Co. conducted rock, stream-sediment, and soil sampling in 1990 (WGM Inc., 1998 [DLR 98-10]).
Geologic map unit (-143.116184583092, 64.1374518962945)
Mineral deposit model Cu skarn or Zn-Pb skarn (Cox and Singer, 1986; model 18b or 18c).
Mineral deposit model number 18b or 18c
Age of mineralization The East Eva skarn is likely related to the Mount Veta syenite of Jurassic age.
Alteration of deposit There is a zone of moderately intense propylitization within the syenite associated with hornfels (WGM Inc., 1998 [DLR 98-10]).

Production and reserves

Workings or exploration Central Alaska Exploration Corp. conducted mapping and rock sampling in the East Eva prospect area in 1989, and Central Alaska Gold Co. conducted rock, stream-sediment, and soil sampling in 1990 (WGM Inc., 1998 [DLR 98-10]).
Indication of production None

Additional comments

The East Eva prospect is located within Doyon, Ltd. selected or conveyed land. For more information contact Doyon, Ltd., Fairbanks, Alaska.

References

References

Caithness Alaska Mining Co., 1990, 1989 annual report, Alaska field operations, appendix 7.2.1A, Doyon reconnaissance geochemical results, part A, volume 2 of 14: Doyon, Ltd. Report 90-06b, 149 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Caithness Alaska Mining Co., 1990, 1989 annual report, Alaska field operations, appendix 7.2.1A, Doyon reconnaissance geochemical results, part B, volume 3 of 14: Doyon, Ltd. Report 90-06c, 145 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Caithness Alaska Mining Co., 1990, 1989 annual report, Alaska field operations, appendix 7.2.1C, Doyon reconnaissance geochemical results, part C, appendix 7.2.2, rock sample descriptions and appendix 7.2.3, geochemical results, sample locations and descriptions - diskettes, volume 4of 14: Doyon, Ltd. Report 90-06d, 181 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Caithness Alaska Mining Co., 1990, 1989 annual report, Alaska field operations, volume 1 of 14: Doyon, Ltd. Report 90-06a, 251 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Flanders, R.W., Freeman, L.K., Puchner, C.K., Rohtert, W.R., Stubbs, G.S., and Tolbert, R.S., 1990, 1989 annual report, Alaska field operations, volume 1: Central Alaska Exploration Corporation, Doyon, Ltd. Report 90-06j. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 10: Doyon, Ltd. Report 91-8g. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 1: Doyon, Ltd. Report 91-8a. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 2, analytical results, geochemical results part A: Doyon, Ltd. Report 91-8b. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 2, analytical results, geochemical results part B: Doyon, Ltd. Report 91-8c. (Report held by Doyon, Ltd., Fairbanks, Alaska).
WGM Inc., 1998, Veta property, 1997 annual report, volume 1: Doyon, Ltd. Report 98-10, 227 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Reporters M.B. Werdon; R.L. Flynn
Last report date 5/1/2002