Annual Geoscience Exploration Seminar (AGES) 2021 - 19 to 22 April, page-184

“That theorised motherload is probably the source pluton orlinked hydrothermal vents/pipes. There will be a series of vents/pipes that thehydrothermal fluids will migrate through to where sulphides settle out.Remember that these are volcanic intrusive bodies that release hydrothermalfluids that contain sulphides.”
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Yes and even more likely that it is actually tapping the mantleand is a pathway for fluid/metals migration to surface. ( I know you know this butfor some of the others). It’s good to keep in mind how the big picture workshere. During planetary formation all the heavier elements migrate to the core of the planet. All that nickel and iron that is postulated to be the composition of the inner part of the planet is accompanied by the other heavies, eg gold, silver, copper etc . So when these deep sources migrate towards surface they are carrying a precious load.

I heard commentary from GA scientists while at AGES that the corelogging done to date is not comprehensive. The standout is that the sheer volume of sulphides in the system is something special. The sulphides of course are what carry the metallic load. Mt Lamb has indisputably demonstrated it is a sulphur rich system. When I was viewing the core I saw chalcopyrite and sphalerite at several points that were not in that reported core log. I expect the assays to move to the upside.

The assaying that will be done (likely started soon) will beextremely comprehensive on NDIBK04 (some intervals down as narrow as 25cm). Wewont know when it is going to drop but I think it has a chance of being therocket some were expecting, even though that core was not targeted at the likelyheart of mineralisation but only picked up perhaps a distant edge of the structure.The drill platform was effectively built in a general area of prospectivityjust off the edge of the station track. If you look at the drill hole locationcompared to the current high def magnetics collected by Inca (something GA didnot have at the time) and if u add some gravity , EM or IP perhaps, then you canimagine how much better targeted Inca holes will be.

These deep seatedstructures and pathways are a feature of many of Inca’s prospects. Suture zones between the Nth Australian craton and the Arunta block include the Hay River, Lorna May and Jean Elson prospectsand all sit in that general exploration model of seeking out DEEP mantle sources.