Capital Raising at $0.050 Imminent, page-95

Ok, I'm with you @ozbucheron. I understood your post as making the calcs, not critiquing them. I thought you were describing the historic mined out width so, practically speaking, even though I misunderstood you, it makes no difference to my previous reaction that you're making rational arguments as to likely limitations to the historic mine.

Grade at depth (and 0RL is not all that deep here I would have thought?). I simply wouldn't expect high grade (ie like CCM was) at all. You'd be looking for primary ore at economic volume. I do have a practical working understanding of the essential mechanics of deposition, including the limitations of supergene deposits. You seem to think I'm arguing for something that I'm not. I didn't buy into CCZ for Cangai, Mt Oxide actually, but I do view Cangai as being of insurance value on the downside if Mt Oxide (and Zambia) turned out to be busts.

Btw I did a bit of reading on Cangai late this afternoon. Came across this independant article on the history of Cangai Copper Mine, quite a good read actually - apparently the copper mine was born out of the gold rush. Anyway, on p110 it references the explorers you mentioned, assuming the author has all the details, they didn't do much drilling and basically bailed after early failure. Do you know of more? CCZ has already done more and found more than the 3 of them put together based on this article and it kind of undermines your argument that they provide authority against what CCZ thinks they can achieve:

• Union - "2 diamond drill holes under the mine in 1972".
• Western Mining Corporation - 1982-1984, "detailed geochemical and geophysical surveys leading to testing by two diamond drill holes targeted on geophysical anomalies"
• CRA Exploration - "a more extensive, five-hole drilling programme in 1991"

https://www.researchgate.net/publication/336714654_Cangai_copper_History_of_'a_good_little_earner'