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Aug 2006 - Marengo Mining

Marengo Mining Ltd (MGO) – Delineating their Copper-Moly-Gold Orebody at Yandera

  • In early 2005, Marengo switched from exploration in WA to establishing an orebody at Yandera in PNG. Yandera had been explored by BHP in the mid-1970s at the same time as BHP farmed-in to Ok Tedi (and delineated the gold cap over the orebody) which caused Yandera to drop onto the back burner. A number of companies have since looked at Yandera mainly from a large company viewpoint but failed to take it any further until Marengo acquired the Project.
  • Yandera is a classic large company target with a copper geochem anomaly ~8km long by 2km wide averaging 0.5%Cu with 5 identified phases of porphyries containing grades up to ~1%Cu (plus Molybdenum and Gold credits), which may include some higher grade zones. MGO started their drilling campaign at the end of May 2006 on their main Gremi Zone target aimed at establishing continuity for a recognised JORC resource by December 2006.
  • As we have seen with other Australian junior companies, the large mining company approach is not necessarily always the way to develop these orebodies, and geological techniques and technology have advanced considerably since the 1970’s. A greater understanding of Yandera is expected after MGO brings in structural geological consultants to delineate the main controls of the copper-molybdenum-gold mineralisation, and identify how best to proceed forward.
  • Although Yandera generally appears to have an overall low grade signature for Molybdenum (~150ppm or 0.015%), we encountered a number of samples of visible Molybdenum, including rocks that appeared to be riddled with it (as shown in Figure 6b on page 4 of this report).
  • Gold appears to have not been a separate consideration as a individual entity when Yandera was being explored, despite the presence of pin-head sized visible gold, and alluvial workings (that are still being worked). Reputedly there is gold in quartz veining too, which requires further follow up and investigation.
  • Written by: Keith Goode
  • Wednesday, 02 August 2006

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