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The ductile shear zone which contains the Dashankou and Chahanusu prospects was discovered by the G&MBR approximately 10 years ago through 1:50,000 stream sediment sampling. The Company followed this up and extended that work with mapping, rock chip sampling and trenching, primarily at Dashankou, to identify several zones of extended mineralisation associated with sub-parallel shears within the Tian Shan Orogenic Belt that can be seen linking Dashankou and Chahanusu, 20km to the northwest.
The Dashankou and Chahanusu prospects exhibit characteristics typical of shear zone hosted gold mineralisation, including intense shearing, sericite-silica-pyrite-siderite alteration envelopes, multiple large to small quartz veins and gold mineralisation in alteration selvedges adjacent to the veins.
Shallow high grade workings have been mapped in the area and exploration in 2005 obtained strongly anomalous mineralisation including trench assay results of up to 6m @1.68 g/t Au; 2m @ 1.65 g/t Au; 4m @ 19.7 g/t Au; 3m @ 18.7 g/t Au; 2m @ 3.13 g/t Au and 4m @ 2.36 g/t Au.
A limited diamond drilling programme of three holes in 2005 achieved a best intersection of 10m @ 2.00 g/t of gold confirming the geological model and the potential for ore grade mineralisation over mineable widths. However, these drill holes were not optimally positioned due to available licences at the time.
Subsequently in 2006, an extensive mapping and trenching programme followed up the high grades obtained from earlier programmes, although only a small strike extent of the mineralised structure within the licence area was assessed. Additional strongly anomalous zones (0.40g/t – 0.92g/t Au) up to 9m wide were also identified.
Exploration to date has identified numerous zones of gold mineralisation hosted by sub-parallel shear zones within a regional bounding structure (Figure 7). These mineralized zones are approximately 1km long and several walk up targets have been established for drill testing in the 2007-2008 exploration seasons.
The Company considers that these new, near surface mineralized zones at Dashankou may have the potential to host open pittable gold deposits. Over the next two years the Company plans to follow up these results and test the geological anomalies. The Company plans to drill test several targets this season and geologists are continuing detailed mapping at 1:2000 scale for further trenching and in preparation for additional drilling.
The strategy at Dashankou and eventually Chahanusa is to quickly identify the near surface mineralisation appropriate for drilling and turn over the extensive holding fairly quickly after detailed assessment.
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