East Eva Prospect, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| East Eva Prospect | Prospect |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 8' 16'' North , 143° 6' 50'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
The East Eva prospect is located within Doyon, Ltd. selected or conveyed land. For more information contact Doyon, Ltd., Fairbanks, Alaska.
Location: 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.
Geology: 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]).
Workings: 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]).
Age: The East Eva skarn is likely related to the Mount Veta syenite of Jurassic age.
Alteration: There is a zone of moderately intense propylitization within the syenite associated with hornfels (WGM Inc., 1998 [DLR 98-10]).
Commodities (Major) - Ag, Au, Cu, Pb
Development Status: None
Deposit Model: Cu skarn or Zn-Pb skarn (Cox and Singer, 1986; model 18b or 18c).
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | EA098 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Yukon-TananaVolcanic Arc
- Yukon-Tanana upper DomainDomain
USA
- Alaska
- Fortymile Mining DistrictMining District
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