Golden Reef / Mpatasie / U&N
- Concessions cover key gold bearing structures of the Asankrangwa Belt;
- Along strike or near Keegan's Esaase deposit.
- Soil anomalies up to 5 km x 2 km with values up to 3,610ppb Au.
- Historic limited drilling with results up to 22 m @ 4.8 g/t Au including 4 m @ 24.0 g/t Au; 65 m @ 1.1 g/t Au.
These 100% held Abzu concessions are located within the Kumasi basin, a 60-75 km wide belt of folded metasedimentary rocks (Figures 11 and 12). This basin is fault-bounded to the southeast and northwest by volcanic rocks of the Ashanti and Sefwi belts respectively. Weakly metamorphosed sedimentary rocks of the Kumasi Basin form a thick monotonous sequence of thinly to thickly interlayered shale, siltstone, sandstone, and wacke.
Medial to the Kumasi Basin is the Asankrangwa Belt, a 5-10 km wide swath of northeast striking, steeply northwest dipping shear zones, minor intrusions, and gold-bearing veins. These shear zones are similar to the ones that form the Belt-Basin margins and similarly host gold mineralization. This is an emerging belt of mineralization, which is rapidly gaining recognition as more gold is found.
This area of the Asankrangwa Belt has undergone extensive past and present alluvial mining along the Ofin, Gyeni, and Bonte Rivers since the late 1800's. Numerous small hard rock mines were also developed by Europeans in the early part of the 20th century. Among these, the Bilpraw, Miradani, and Mpesetia mines had significant underground development (Griffis, et al., 2002). Others consist of simple adits, a few with minor stopping. In more recent years, artisanal miners have dug countless shallow mines on veins.
In the 1990's, Bonte Mines developed an alluvial operation north of the "U" concession producing gold from extensive placer deposits in river valleys. From 1997 to 1999, Leo Shield and Resolute Mining explored the Mpatasie and Golden Reef area with soil and trench sampling, ground magnetics, and limited shallow drilling. Unfortunately, much of this data has been lost.
The U and N concessions were also explored with soil sampling done by Pan African Resources between 2007 and 2010. Results from Pan African sampling show similar positive results along the eastern margin of the "N" concession. Samples from the "U" concession are mostly over disturbed ground and did not achieve reliable results. Abzu is currently evaluating this data and further sampling is planned.
Abzu covered the Mpatasie concession with a soil-sampling program in 2008. Results of this work show consistent and repeatable surface anomalies over coherent northeast-trending zones 2-4 km long and 0.3 - 1 km wide parallel to the regional structural trends. Numerous gold values in soil samples are in excess of 300ppb with the highest values up to 3610 ppb.
In early 2011, Abzu collected ~2000 soil samples along the western and eastern sides of the Golden Reef concession (Figure 13). The western survey successfully expanded the existing Mpatasie anomaly to an area approximately 5 km x 3 km (Figure 14). The eastern survey identified a new region of anomalous gold at surface along zones up to 3 km long and 0.6 km wide (Figure 15).