Marengo: Yandera drilling on

 THE Marengo Mining Ltd (Marengo) has started to drill a depth of about 2,000m at the Dimbi zone of the Yandera central porphyry system. 

Maringo said last Thursday that drilling began last Friday, with a target completion of the 10-hole program by early December.

The exploration will identify near surface resources that may enhance a starter pit for a Yandera mining operation in Madang. 

The drill holes would explore recently mapped mineralised structures, of which six holes would jointly test up-dip projections of elevated copper intercepts in existing drill holes. 

Due to 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 programme was mounted middle of this year to know more about geological structure of the Dimbi zone — the rock types and especially the nature, extent and orientation of recently identified outcropping mineralised structures. 

A fundamental north-westerly striking structure, the Dimbi Fault, which dips at a high angle to the north-east, bounds the Dimbi zone on the south–west. 

This early fault established a conduit for mineralised fluid flow into the Dimbi zone, along a later set of north-east trending faults.