The 2011 exploration program at Minco’s Longnan Gold Project in China’s central Gansu province has expanded the resource at the Shajinba and Baimashi zones.
The program’s aim was to further test the gold mineralization zone discovered in 2010 within the Yejiaba property, and included an initial drilling schedule at Shajinba and a trenching program at Baimashi which is within the same structural and metallogenic trend.
Minco says the results are encouraging and have confirmed the discovery of a new Baimashi gold zone which the company is now preparing to drill over 3000 metres.
Minco’s Chinese subsidiary holds 12 exploration permits in the Longnan region within the Qinling gold field. The Yejiaba project is one of three being explored under the Yangshan gold brand.
In the Shajinba zone, a total of 2829 metres was drilled in 7 holes with depths ranging from 288 to 501 metres. The targeted zones were gold mineralized, coinciding with surface trace of a thrust fault, gold-in-soil anomaly and a polymetallic mineralized zone. Drill results returned lower gold values than surface trenching but verified the structural interpretation based on the surface work and geophysical surveys.
One hole intersected a wide fault zone of black carbonaceous phyllite and tectonic gouge with several dykes of porphyry granite to quartz diorite with a portion averaging 0.13 grams/tonne gold over 43.56 metres.
Another hole within polymetallic mineralization intersected a pure hematite vein in massive limestone. Iron content averaged 61.5% over 2.29 metres and the drill intersection doubles its strike extension to 400 metres.
Three trenches were also dug within Shajinba to test continuous induced polarization anomalies. Two of them returned results of 0.59 grams/tonne gold over 6.6 metres and 0.2 grams/tonne gold over 6 metres.
Trenching within the Baimashi zone covered an area of 3km x 1km, about 3km west of the Shajinba zone. Numerous occurrences of gold are clustered in four areas and hosted in massive limestone and calcareous phyllite. Significant results include 6.4 metres @ 3.62 grams/tonne gold, 2 metres @ 4.41 grams/tonne gold and 3.5 metres @ 11.82 grams/tonne gold.