RE: Weekend Research28 Sep 2025 13:12
I asked chat GPT-5 to compare the 2 holes separately against both the Telfer & Havieron deposits, 7 then against other known deposits around the world this is what it came up with.
Similarity Matrix (%)
Attribute 25RSDD001 (breccia pipe) 25RSDD002 (altered sediments)
Telfer Dome reefs/stockworks ~55% similarity — breccia + quartz–carbonate–pyrite–chalcopyrite is consistent, but no bedding‑parallel reef geometry yet ~65% similarity — carbonate–quartz–pyrite veins in altered sediments, bleaching/foliation halo resembles Telfer’s alteration footprint
Havieron breccia/crescent zones ~70% similarity — long mineralised breccia interval, chalcopyrite present, geometry reminiscent of Havieron breccia domains (but pyrrhotite not yet reported) ~50% similarity — alteration halo is consistent, but sulphide suite is more pyrite‑dominant than Havieron’s pyrrhotite–chalcopyrite
Other IOCG‑style systems (e.g. Ernest Henry, Olympic Dam margins) ~60% similarity — breccia + Cu sulphides, but lacking hematite–magnetite IOCG signature ~55% similarity — alteration halo is consistent with distal IOCG, but mineralogy is more orogenic‑style
Orogenic breccia/vein systems (e.g. Fosterville deep zones, Porgera PNG) ~65% similarity — deep breccia with sulphides, late‑orogenic fluids ~70% similarity — strong alteration halo, disseminated pyrite in sediments, consistent with distal orogenic Au systems.
Interpretation
25RSDD001 is more Havieron‑like (breccia‑hosted, Cu–Au sulphides, long intercepts).
25RSDD002 is more Telfer‑like (altered sediments, carbonate–quartz–pyrite veins, pervasive halo).
Neither hole yet shows the definitive Telfer reef geometry (sheeted bedding‑parallel reefs) nor the pyrrhotite‑rich massive sulphides of Havieron.
So, both are partial analogues, but not perfect fits.
So neither of the exciting known deposits, ties in that well with what has been found in 25RSDD001 & 25RSDD002 to date (obviously there is a lot more data to come from 25RSDD002 which is barely inside mineralisation thus far.
Best local analogues instead:
25RSDD001 (breccia pipe) looks closer to Maroochydore hypogene Cu–sulphide systems than to Telfer reefs.
25RSDD002 (altered sediments) is closer to Lamil Dome‑style dome‑margin alteration corridors.
Drill Baby Drill
LOTM