I noticed 'the hook' notation on one of your diagrams.
More focused on other aspects last night but these are some comments from a geo's perspective.
Looking at a better resolution from the ENR magnetics makes some observations about this comparison possible.
Perhaps the most important is Luni is NOT directly associated with mag anomaly A (at least 1 Km from drill holes to northern end of A). It may prove to be in the future though my suspicion would be that it will be magnetite rich sediments rather than a carbonatite.
Luni is NOT a strong magnetic feature at this resolution and this will not change with more detailed surveying. It is a strong, discrete gravity feature which is probably part of the reasoning why WA1 chose to drill it rather than the more prominent anomaly A.
A vs B ? Magnetic "interp" from a geo - DYOR
Depth of cover??
I suspect A is under some cover (progressively deeper to south?) along the northern ?faulted margin of the Lake Mackay "basin" to the south. If this is correct, then the strength of the magnetics may be attenuated by the cover. Still this is one of the highest magnetic features on the image in line with the highs on the Agrimin ground in the SE.
Anomaly B has a different magnetic pattern to A. Much broader with lower intensity in spite of probably having less cover. A higher resolution survey would likely give more detail with perhaps some zones more akin to A.
Structure from magnetics.
ENR, and others, interpret linear features to be related to faulting (and locally folding where curved).
The thin black lines are selected examples of these.
Of particular importance are the possible offset (1Km+-) of the northern end of Anomaly A. There is nearby sub parallel feature which may impact the Luni area in some way [this feature was picked out by ENR and shown on the 2021 image posted last night].
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Carbonatites and .....................perhaps IOCGs
- Carbonatites are intrusive features so the timing relationship to faulting may impact the nearology concept.
- Two carbonatites 30+ Kms apart P2 and Luni. IMO are unlikely to be the only ones so structural controls may be important.
- Luni is only weakly magnetic, P2 a moderate to strong magnetic feature. Both have good gravity signatures.
- This combination of OK gravity and variable magnetics will make searching for more a tricky process IMO.
- If the Nb (and/or other commodities) content of P2 and Luni make them economic WA1 are going to need a large budget to drill them out along with the "nice" problem of what to target on other parts of their large land holding.
- ENR are playing catch up for carbonatites but may have an IOCG (or two or three) on their hands already. Some 20Kms of the magnetic trend lines from P2 to Luni are across ENR grounds with the Shackleton area already showing REEs.
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BHP drilling at Elliot.
Lots of ground and JVs in NT/WA.
Well managed with world class geology input.
Not a one trick pony at Aileron where ENR may just have been unlucky not to choose the best ground even though they had first choice.
(20min delay)