Beats Me; Winchester Prospect, Bristol Bay Mining District, Dillingham Census Area, Alaska, USAi

Regional Level Types
Beats Me; Winchester Prospect	Prospect
Bristol Bay Mining District	Mining District
Dillingham Census Area	Census Area
Alaska	State
USA	Country

Location: This prospect is on an upland south of the upper King Salmon River, possibly in section 10 and/or 11, T. 2 N., R. 51 W. The site of this prospect is arbitrarily chosen to be the summit of this upland at elevation 1606; it is probably within a mile of the true location of this prospect.
Geology: Cominco Exploration discovered this prospect in the early 1980s (Travis Hudson, personal knowledge, 2005). It is in an upland area of hornfels developed from sedimentary rocks of the Cretaceous Kuskokwim Group that are cut by felsic dikes. Quartz stockwork veining and arsenopyrite mineralization are locally well-developed. Stream sediments in the area have anomalous gold values and several rock samples contain over 1 part per million gold. TNR Gold Corporation (2005) continued exploration of this prospect and core drilled in the summer of 2005. TNR announced the results of their 2005 drilling in October 2005. The 6 holes totaled 1754.3 feet and most went through medium-grained felsic intrusive rock into sedimentary rocks of the Cretaceous Kuskokwim Group. The felsic intrusive rocks were commonly anomalous in gold associated with arsenic, bismuth, copper, and tungsten. The highest grade interval in the holes was 1.60 grams of gold per ton over 14.3 meters; this included a 2.13 meter interval with 2.93 grams of gold per ton. The holes were drilled on a geochemical anomaly 500 by 1200 in area along the ridge. There is little outcrop in the area. TNR Gold Corporation (2007) drilled 11 more holes in 2006 with emphasis on the Winchester zone where they now have 7 holes along a cross section through the zone and a clearer understanding of the geology of the deposit. The mineralization continues to be associated with light-gray felsic intrusive sills and is not restricted to brecciated zones or veins.
Workings: The Winchester prospect was mapped and sampled by TNR Gold Corporation in 2005 and 6 holes were drilled that totaled 1754.3 feet. TNR drilled 11 more holes in 2006 with emphasis on the Winchester zone where they now have 7 holes along a cross section through the zone and a clearer understanding of the geology of the deposit.
Age: Probably Latest Cretaceous, the age of intrusive rocks and mineralization in the nearby Shotgun (TA007) prospect.
Alteration: Silicification.

Commodities (Major) - Au
Development Status: None
Deposit Model: Arsenopyrite-bearing quartz veins in hornfels and felsic intrusive rocks.

Other Databases

Link to USGS - Alaska:	TA029

Other Regions, Features and Areas containing this locality

References