RE: Stumbled on this16 Jan 2019 14:01
but this was interesting.....
aussiebattler Hey all, just spent a lazy Saturday afternoon reading stuff to do with $GGP.L and the Havieron discovery. Most if not all of you are probably already onto it but here's a romantic piece to read on a lazy Saturday afternoon in your timezone. (In Australia we have a thing called "The Dreamtime".) The question I ask myself when having a look at exploration plays is “Are we looking in elephant country?” Usually I‘m look for porphyry Cu/Au exploration plays. (Have a look at PolarX on the ASX.)
Within Australia and South America a majority of IOCG deposits are recognised to be within Neoproterozoic to Mesoproterozoic basement. (Wikipedia)
An interpretation of the Paterson area has been carried out to understand the distribution of Proterozoic bedrock beneath thin (<300 m) Phanerozoic cover. (Geoscience Australia)
Multiple IOCG-type targets identified in the region (Greatland Gold)
Olympic Dam (BHP) is an IOCG deposit.
Exploration for IOCG deposits has relied on at least these two criteria for targeting exploratory drill holes;
• A substantial gravity anomaly, taken to be representative of accumulation of iron oxide minerals within the crust, which is seen as being associated with classic Olympic Dam style IOCG mineralisation. Gravity data is often interpreted via a 3D inversion to resolve the density contrast and sub-surface position of a dense body of rock. More qualitatively, the "edges" of a gravity body are considered more prospective as this theoretically represents the mineralised margins of an intrusive body.
• High magnetism within the crust, again taken to be representative of accumulation of substantial iron oxide minerals within proximity to the targeted IOCG mineralising events
See Slide 11 for what gravity & magnetic surveys look like at Havieron.
https://greatlandgold.com/wp-content/uploads/2014/01/20181204-GGP-AGM-Presentation.pdf
How does GGP describe the orebody? Elliptical sub-vertical plunging SE perhaps beyond 1400m deep. (If you own Artemis – ASX: ARV – this is very interesting because ARV has the ground surrounding Havieron to the N, E & S.)
What can we make of the data to-date? I’ve plotted HAD005-9 in relation to HAD001.I think I can make a case for an elliptical body roughly 150m long and 100m wide. There is a mafic dyke that messes up the orebody.
So could GGP have found an elephant? Here’s the maths:
1000m (deep) x 150m (long) x 100m (wide) x 3.5 SG = 50 Mt+ It’s not an elephant it’s a WHALE! Of course this is dreamtime stuff but it’s in the ballpark. So, we know that we are in elephant country and most likely have found an elephant (at least).
The next question is “Is it mineralised?” I guess we are going to find out very soon but here’s a guess:.
50 Mt at 4g/t Au = 6.5 Moz plus copper.
So is it worth a few dollars of speculative money? It certainly looks like it.
Good luck, because we always need luck.
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