adding the caption to the picture... Figure 7. Drill core from...

adding the caption to the picture...

Figure 7. Drill core from 23HED003 showing brittle fractures and shearing at the contact at 196.5m of
the D’Kar Formation and the Ngwako Pan Formation with minor visible Copper staining

Regarding the red siltstone in the picture posted by @Crusader95: siltstone is often deposited in a similar environment to shale (refer to Page 4 of the 8th March announcement).

To emphasise the importance of shale, I’ve transcribed part of a presentation made by Bruce Hooper, NRX’s Chief Geologist, at the Africa Down Under Conference:

… we’re really looking for the big one and this is where the models for the large copper deposits (come in). This JV we have acquired on the ground is over 100km,where never has there been a previous drill hole. The modelling of fluid flow and precipitation of copper points this as one of the best areas. It has got analogies to where the Kamoa discovery is and what we’re learning from Zambia and Congo. Trying to explain it to one of our Non-Executive Directors, Rob(Klug), last night as the beer was flowing at drinks. We’re looking for where the fluid flow comes, where the waiters were carrying the beer out, and the first reductant, which is the black shale, or in the case last night, all of the delegates waiting and grabbing that first beer as it came through the door.

So, where these copper rich fluids come up through and out of the basin, we are looking for that reductant - those thirsty delegates that take the beer and where the copper precipitates….

We’re drilling on a couple of kilometre spacings along the top of that basement high, targeting that very distinctive horizon where we find the black shale above the sandstone. This is the zone that the Cupric Canyon are mining down to 1km. Just above the Mateo SFR/ MOD discovery, and where Cobre have just got their intercepts.

This first reductant, the shale horizon is the key one for precipitating significant areas of copper, domes, antiformal structures where that copper can get trapped.

Mmm Beer - Homer