Vancouver — High-grade oxide copper discovered on its Khok Adar project in western Mongolia has
The company has observed two distinct types of secondary copper mineralization at the property, separated by a north-trending structure.
On the west side of the structure, geologists have discovered exotic oxide copper minerals such as azurite, malachite, cuprite, tenorite, chrysocolla and native copper within fractures and open-pore fillings in a brecciated quartzite unit. Previous Russian exploration work on the eastern portion defined Zone 1, an area of chalcocite enrichment identified in a mixed sulphide-oxide zone.
Encouraged by the results so far, East Asia believes a significant copper source might exist on the ground, since known sulphide zones are not of sufficient size to account for the enrichment blanket.
The company is in the midst of its second phase of exploration, comprised of trenching and drilling. Assays are awaited from 10 reverse-circulation holes (totalling 1,100 metres) and 11 core holes (totalling 2,000 metres) recently completed along strike of Zone 1.
Drilling cut secondary sulphide copper (in the form of chalcocite and covellite) averaging 15-20 metres in thickness and 120-200 metres in width. The copper mineralization was intersected in the mixed oxide-sulphide zone beneath strongly weathered rocks.
Drilling has returned long mineralized intervals up to 90 metres assaying 1-2% copper and 10-20 grams silver per tonne, with high-grade sections as high as 9% copper. Meanwhile, trenching has exposed wide zones of copper oxide material, including Trench C1’s 210 metres averaging 1.4% copper.
East Asia is one year into its 3-year option deal to earn 75% in Khok Adar. The company must spend US$1 million on exploration over the three years.
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