RE: Zambia - Use of Cu:Sc anomalies (part2)4 Nov 2021 15:24
Hi Rocktapper, I did post an overlay of the Cu:Sc maps for Arc and FQM licenses quite a while back:
https://twitter.com/NavSeis/status/1398281650719629315?s=20
and also with a diagram of the generalised fault zones overlaid on it:
https://twitter.com/NavSeis/status/1398636572346568705?s=20
It's a pity that we don't know the maximum Cu:Sc ratio at Sentinel (the upper limit of 10,000 is the assay limit I believe and not a reflection of the maximum recorded value), as that would be a good indication of the expected Cu grades compared to Sentinel. Of course both FQM and AA will have that information. AA will also have a more detailed breakdown of our ratio values so they will have a pretty good idea of what to expect I think.
It's definitely true that Muswema is the most 'Sentinel like' in that the Cu:Sc data is the largest and also closely matches the EM anomaly. I wish they had started drilling there first but maybe they wanted to have the new EM survey completed before drilling the number one target.
It's interesting that the last hole at Fwiji which seems to have been drilled sub-parallel to a mineralised vein, is well away from the main Cu:Sc anomaly. There is a feinter anomaly in that area, similar in magnitude to the area they are drilling at the moment. My thought is that the strength of the Cu:Sc anomaly may be related to the depth of the mineralisation. The shallow oxides drilled at Fwiji and Cheyeza are both in the areas of strong Cu:Sc ratio. (Possibly the ratio is increased in the process of oxidisation?) Which makes me think they are part of the larger (deeper) sulphide systems which have been oxidised over time. Also the EM survey has predicted two large areas of hydrothermal alteration at Cheyeza which makes me think that it may be like an iceberg with the Cu:Sc anomaly just showing us the shallow tip.
Personally I would have liked to see them continue to drill SW of the oxide area at Cheyeza and follow it to see if it leads back to the fault zone and the sulphide source. It will be interesting to see what these latest drills produce though, I'm guessing that they are currently drilling the holes at the centre of the anomaly, which is directly in line with the fault zone to the SSE.