Marengo Mining was last week expected to start a planned diamond drilling campaign of about 2000 metres, targeting the Dimbi zone of the Yandera Central Porphyry System. Completion of the 10-hole program is planned by the end of the 2013 field season, in early December.
The exploration strategy is to identify near surface resources that may enhance a starter pit for a Yandera mining operation. The drill holes will target recently mapped mineralized structures, of which six holes will jointly test up-dip projections of elevated copper intercepts in existing drill holes.
Due to the challenging terrain, the Dimbi zone has received less attention as an exploration target than the other zones (Gremi, Imbruminda and Omora) that make up the Yandera Central Porphyry System. As a result, a detailed field mapping program was mounted in mid-2013, to improve the geological understanding of the Dimbi zone, the rock types, and especially the nature, extent and orientation of recently identified, outcropping mineralized structures.
A fundamental north-westerly striking structure, the Dimbi Fault, bounds Dimbi zone on the southwest. This early fault established a conduit for mineralized fluid flow into the Dimbi zone, along a later set of north-east trending faults. Drill holes have been sited to test projections of interpreted north-east striking mineralized structures in the hanging wall of the Dimbi Fault, as well as elevated copper intercepts in several nearby existing holes.
An elongated copper-in-soil geochemical anomaly runs parallel to, and overlies the hanging wall of the Dimbi Fault, reinforcing the logic of this current drilling strategy.
Marengo continues to work towards completion of a feasibility study on the Yandera project. In these efforts a continuing focus is on identifying the most efficient and cost effective power solution, together with reviewing the options for environmentally responsible disposal of mine tailings.