RE: Havieron18 Jun 2025 08:20
From my post March 2023
( I might be over optimistic with the Molybdenum but got that from Sherry the Newcrest CEO)
“An undercover geological gem.
Luck or superb knowledge in striking the sulphides in HAD005.
First couple of metres had 10% copper that’s a dream of a find.
The copper sulphides consist mainly of chalcopyrites and are super rich in its mineralisation, consisting mainly of copper but high in gold grades as well.
The beauty of this ore body is its compact verticality enabling the economics of it to be very viable.
Recent drilling has identified these sulphides as getting richer the further they go down and larger exploration rigs are required to explore these deeper zones below 1400m from surface.
There is also cobalt in amongst these sulphides but this may not be viable from these sulphides.
Molybdenum though is said to be in these sulphides, now that can be obtained from this mineralogy.
Finding Molybdenum in the top of the ore could be a game changer, it will require a Moly plant to be built at Telfer though.
Cadia’s Molybdenum plant reduces Cadias AISC right down to between $0-100 and has paid for itself in the first year.
Tellurium and Tungsten are also evident in and around the crescent zone.
Gervais Heddle quoted this a multi commodity mine.
A multi commodity mine means every truck load to Telfer becomes even more valuable, revenues higher and AISC costs lower
The sulphides are not the end of the geological story as breccia envelops the sulphides and in places have very high grades.
Crackle breccia which is the weakest is present around the edge of the ovoid body and at the top. It’s weak because the original rocks were not moved very much and the cracks around the clasts are tight not letting sulphide intrusions enter them.
Where the cracks widen out the grading increases with more silica entering the cracks here we have cemented breccia.
A third breccia is the actinolite breccia these seems to have intruded the centre of the ovoid from the SE. Here we find diorite sills laiden with rich mineralogy .
Early drilling may have discovered these within the sulphides on the north side, one is about 600m from surface so fairly near the top of the ore 0.3m @ 136g/t
Another one is down around 1300m from surface and has 0.3m @ 637g/t , there are others in the same locality.
These diorites may have changed the viability of the northern corridor from weak bulk cave to high grade selective mining techniques.
The star of the show has to be the Eastern Breccia a high grade bulk caving potential above 2g/t with grades like Drill HAD84 which produced 342m @ 2g/t that’s a tier 1 mine on it’s own.
One thing that is starting to come from the EB is the richness of it’s mineralisation, economic levels of nickel, zinc and moly are being examined, the grades of gold are getting higher as the knowledge goes lower down.
The ore body is still expanding with further drilling and the knowledge of the breccia gr
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