Agree the announcement should have come out with more data, in...

Agree the announcement should have come out with more data, in my opinion, core photos, and more detailed core logs.
The ASX has made other companies put the table with visuals in announcements, which is good for readers to get a better understanding of the core.
The percentage in the table is for the amount of minerals visible, that is amount of chalcopyrite, not the amount of copper, however, this can or could be estimated as chalcopyrite contains approx. 34.5%.
The visual estimates are a guide and it would be hard to estimate with any sort of accuracy.