Copper-Cobalt deposits, one of the commodities that the Democratic Republic of Congo is known for. The thing about copper in the DRC is that it’s everywhere and nowhere at the same time. Soil anomalies almost anywhere in the DRC extension of the copper belt will show anomalies in copper grade, but try find the source, particularly high grade sources and you could be drilling for some of the most complex orebodies. Typically, orebodies sit as what is referred to as mega-breccia blocks, and the trick is first finding these, and structurally understanding them, and then finding the ore within these mega-blocks.
Minrom has been conducting a large drilling programme on one such deposit, Kamfundwa Mine in DRC. Kamfundwa is a copper-cobalt mine with the majority of historical mining focusing on the copper. Anyone who’s worked in the DRC knows that finance is a tricky business there, people want the BMW i8 but can only afford a scooter. Therefore, Minrom employed a phased dynamic drilling approach in order to maximise the geological data obtained and minimise costs.
So here’s what we found:
- Triple tube is a must, as core is highly fragmented and often in ore bearing units,
- Don’t forget the historical data! Over 160 historical sections were digitised and used to create a historical geological model, which greatly aided in guiding the drilling programme.
- Get to know the stratigraphy – sound obvious but when you are dealing with structurally complex orebodies your understanding of the stratigraphy and its depositional history can go a long way in understanding the core.
- Geophysics, geophysics, geophysics – that’s right we’ve come along way since the 1940’s so why explore the same way? Especially since high definition magnetics followed by EM is proved to work very well in Katangan style mineralisation.