RE: Conductor located in A2 after DHEM2 Nov 2021 22:37
Wolf - I agree this can sound confusing, and occasionally even contradictory. These are my thoughts, I hope they don't cause even more confusion :-)
DHEM reads horizontally, not vertically. So far, they have only used a winch with 780m of cable, and got strong, and increasing, EM readings in the last 20m, hence the belief that they have located the upper tip of a conductor. The idea is to use a longer cable to test the remaining 221m, which will provide a better picture of what is in the bottom quarter of the hole. The larger winch is currently working on the B hole that is still being drilled. I expect it will have finished there by the end of next week, and will then be moved to A2.
They are also going to conduct other surveys (Ben mentioned TDEM, but I would have thought the target is too deep) in order to get resistivity measurements - this would all then be tied in to the magnetic measurements and to the actual rock seen in the core, and give a better idea of what the anomaly actually is. At this stage it could be:
* something magnetic and conductive but of no interest, such as magnetite (unlikely).
* disseminated sulphides, that may or may not be indicative of massive sulphides or other orebody close by.
* an ore body which we may have already hit, which is not classic massive sulphides, but which is yet to be identified - for example, PGEs are usually very difficult to identify visually.
I suspect the "F'd up rocks" start above the DHEM anomaly and continue to the bottom of the hole, and very likely beyond. Without seeing the core and assays, I can only guess that this is a feeder zone, with consequent enrichment of metals. What those metals are, and whether they are sufficiently enriched to be commercial, no-one yet knows. If it is a feeder zone, then clearly it could extend to considerable depths beyond the drilled 1001m. The fact that pegmatites have been seen, indicates that the magma has cooled and solidified very slowly, giving time for any dense liquid metalliferous compounds to settle out and hopefully form economic orebodies.