WIN GROUP OF CLAIMS
POLYMETALLIC ORE PROJECT AT BOWSER CREEK, ALASKA

Click here for a printable PDF of the Win Group of Claims polymetallic report.

Background.
The Win Group of Claims (Bowser Creek, Alaska) project was discovered in 1967 by a U.S. Geological Survey Team (USGS Circular 559). USGS Circular 559 described the find and reported assays of 52.2, 56.3 and 309.8 ounces of silver per ton. Since then, several geologic reports of the area, performed by geologists from Homestake Mining, Cominco, Hunt Oil, Anaconda and Exxon, have stated the importance of Bowser Creek as a potential area for the discovery of a major polymetallic skarn deposit opportunities for porphyry copper and vein mineralization. The Bowser Creek—Win Group of Claims project has only been explored on the surface by trenching, sampling, and mapping. Ore targets have been proposed but no drilling has taken place.

Geology.
Most of the mineralization targets in the area are located near intrusive bodies with high possibilities of both base and precious metals ore occurrences.

Skarns.
The most conspicuous ore is hosted in calc-silicate or replacement polymetallic skarns near intrusive bodies. The intrusive-skarn contacts in the area are not readily exposed. The possibilities of having ore bodies with Cu, Pb, Zn, Ag mineralization are high. In as to addition, mineralization also occurs in fissure veins in limestones outside the area of metamorphism linked to felsic-porphyry dike intrusions and as fracture fillings in igneous intrusive breccia and granodiorite porphyry. The skarns and fissure veins contain sphalerite and argentiferous galena.

A surface exposure (depth measured by trenching and a visible vertical plunge) exposes 54,000 tons of ore with a weighted total of 7.199 oz/ton Ag, 2.82% Pb, 3.05% Zn, and 0.11% Cu. Within this total, a width of 20 feet was mapped to have a weighted average of 50 ounces of silver per ton. This ore outcrop continues below the talus overburden.

Intrusives.
The intrusive bodies at Bowser Creek—Win Group of Claims present an opportunity for mineralization in several ways. There are pyrrhotite-sphalerite fracture fillings in igneous breccias. The environment is also propitious for finding hidden intrusive cupolas and disseminated deposits within the intrusives. The close contact between limestone and the intrusives could also have developed some mineralization. The deposits in limestone are replacement bodies and fissure veins also associated with the intrusives.

Exhalative-type deposits.
In the last three years, a number of mining companies have maintained intense exploration activities including drilling in the surrounding areas. In the Anaconda BMP project, which is adjacent to the Bowser Creek—Win Group of Claims to the north, Zn-Pb-Cu exhalative-type deposits were reported. This opens an additional opportunity for the Bowser Creek—Win Group of Claims project since the same environment extends southward.

This polymetallics report on the Win Group of Claims—Bowser Creek Alaska was compiled in 2008 by Geologist Ricardo Villasenor

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