Slide 1: How do you rank 75 under-cover Cu-Au targets for drilling in the Delamerian?
For personal use only How do you rank 75 under-cover Cu-Au targets for drilling in the Delamerian? Peter Rolley Chief Geologist & Exploration Manager SAEMC 2 December 2022 1
Slide 2: Important Notice: Cautionary Statement
IMPORTANT NOTICE CAUTIONARY STATEMENT The Economic Assessment discussed herein has been undertaken to explore the technical and economic feasibility of developing an underground mine to economically and sustainably exploit the Kanmantoo Copper Gold Deposit, located in South Australia. The Kanmantoo
Slide 3: Today's Presentation
Todays Presentation For personal use only • Regional Exploration Summary • Regional Prospects • Kanmantoo UG 3
Slide 4: Winu
Winu For personal use only The Winu copper system in NW WA was recently described by RTZ at an AIG meeting in Perth, now available on YouTube (18-05-2022). Winu is reported as Indicated ~ 249 Mt at ~0.55% CuEq Inferred ~358 Mt at ~0.46% CuEq (ASX:RTZ 23 February 2022) RTZ was attracted to 17 Mile Hi
Slide 5: Winu
Winu For personal use only Coarse grained andalusites overprinting earlier sillimanite Cu is open space infill and is late. Gold occurs as electrum with bismuthinite Sulphides overprint early quartz, biotite, andalusite Alteration sequence (early to late) is retrograde 1. Early unmineralised qtz vei
Slide 6: Where is Hillgrove Exploring?
Where is Hillgrove Exploring? For personal use only • Kanmantoo Province is a large Cambro-Ordovician sedimentary/volcanic basin on the margin of the Adelaide Fold Belt and the Gawler and Curnamona Cratons • The Kanmantoo Province has been deformed by the Delamerian Orogen • Geology of the Kanmantoo
Slide 7: Copper System at Kanmantoo
Copper System at Kanmantoo For personal use only The processes observed at the Kanmantoo Cu-Au mine are also evident at numerous Ag-As-Au-Bi-Cu-Fe-Mo-Pb-W-Zn occurrences in the Kanmantoo Province. The following observations are consistent for the vast majority of these occurrences 1. Occur in sedime
Slide 8: Copper System at Kanmantoo
Copper System at Kanmantoo For personal use only Garnets proximal to ore are now Fe rich and Garnets/andalusites depict the bedded fractured with chlorite, chalcopyrite infill layers, which are truncated by veins infilled with Cpy and Po 8
Slide 9: Kanmantoo is a Hydrothermal Cu Breccia System
Kanmantoo is a Hydrothermal Cu Breccia System For personal use only High grade copper mineralisation in Central Kavanagh The mineralisation is typified by Chalcopyrite-pyrrhotite veining within a strongly altered Andalusite schist. The andalusites in this image are poikiloblastic. The alteration is
Slide 10: Gold-Bismuth System at Kanmantoo
Gold-Bismuth System at Kanmantoo For personal use only 1. Gold is most commonly spatially associated with a) bismuthinite and Bi-complexes, and b) chalcopyrite/pyrrhotite 2. Correlation co-efficient for a) Cu:Au is ~0.2 b) Bi:Au is ~0.7 3. Gold is dominantly 5 – 20 µm in size, and detected as nano-
Slide 11: Kanmantoo Cu-Au is a multi-stage magmatic driven hydrothermal mineral system
Kanmantoo Cu-Au is a multi-stage magmatic driven hydrothermal mineral system For personal use only Paragenetic sequence proposed as: o Early quartz veining (some now folded) o Metamorphic assemblage (andalusites et al) Post metamorphism: o Early potassic assemblages with minor chalcopyrite o Magneti
Slide 12: Sherlock Cu-Zn System: Validation of Mineral System Model
Sherlock Cu-Zn System: Validation of Mineral System Model For personal use only As previously noted, >95% of the Kanmantoo Province is under cover of the Cainozoic Murray Basin Cover. Question: Is the Kanmantoo Cu model valid for the Cambro-Ordovician terrain under the Murray Basin? The Sherlock Cu-
Slide 13: Sherlock Cu-Zn Prospect: Validation of Kanmantoo Model
Sherlock Cu-Zn Prospect: Validation of Kanmantoo Model For personal use only Petrology of the alteration and veining from 15 core holes has identified the following characteristics of the Cu-Zn-Ag-Bi-W mineralisation • The Sherlock system is hosted in quartz-biotite schists, marbles and mafic volcan
Slide 14: Prospects, prospects, prospects
Prospects, prospects, prospects For personal use only HGO have undertaken a grass-roots approach to the exploration of its tenements in the Kanmantoo Province. • Compilation of past exploration activities • Entry of drill hole and outcrop geochemical data from • Uni Adelaide (Foden), GSSA (Curtis),
Slide 15: Prospects, prospects, prospects
Prospects, prospects, prospects For personal use only What did we find within the Kanmantoo Province after all the compilation and grass roots work? A past drill hole with 75m of garnet-chlorite-magnetite alteration with attendant po-py-cpy sulphides to 15% and ~6000ppm Zn+Pb with minor Cu and Au (S
Slide 16: Prospects, prospects, prospects
Prospects, prospects, prospects For personal use only What do you do to try to justify which prospect is worthy of drilling? In the south-east HGO’s ranking is based on looking for sediment hosted copper system derived from processes that are now understand as operating in this Province. This is con
Slide 17: Sherlock Soil Geochemistry
Sherlock Soil Geochemistry For personal use only HGO have also tried to use soil/auger sampling to identify sediment hosted prospects. In the past year an ADI was granted to assist HGO with this concept where the Cainozoic cover is 1 – 300m thick. Stage 1 Sherlock was chosen as the trial case for so
Slide 18: Regional Soil Geochemistry
Regional Soil Geochemistry For personal use only Stage 2 – 4-acid analysis of a number of auger traverses (to 1.2m depth) and past “RAB” holes to 10m depth We also looked at using a pre-leach of ammonium acetate to remove the calcrete from the samples and then use a 4-acid on the residue – same resu
Slide 19: Raptor (near Tailem Bend) – A Kanmantoo style prospect?
Raptor (near Tailem Bend) – A “Kanmantoo” style prospect? For personal use only • Strong Cu-Mo-W-Pb-Zn anomalism in past drill hole • Hosted in mafic and biotite schists • Retrograde thermal alteration/veining by • K-spar, sericite • chlorite, sulphides • epidote, carbonate, pyrite. Drill core petro
Slide 20: Cooke Basin – Another Kanmantoo style prospect?
Cooke Basin – Another “Kanmantoo” style prospect? For personal use only • The Cooke Basin is named after a sub-basin that is ~50 kms in length • Nearest drill holes are along its margin, with past explorers chasing magnetic zones • MOO11 (sediments), MOO18 (basalts) have both been identified as stro
Slide 21: Cobra (near Keith) – Another Kanmantoo style prospect?
Cobra (near Keith) – Another “Kanmantoo” style prospect? For personal use only • Metasediments to biotite schist • Garnet proximal to sulphides • Retrograde thermal system including: • K-feldspar • Sericite (minor) • Chlorite • Epidote (major) • Sulphides (pyrite, pyrrhotite, chalcopyrite) • Carbona
Slide 22: Using the Kanmantoo style as a prospect ranking tool
Using the “Kanmantoo” style as a prospect ranking tool For personal use only • Petrology has identified a number of prospects throughout the Kanmantoo Province with the same vein/alteration paragenesis • The “Kanmantoo” model does explain the majority of the sediment hosted copper occurrences in the
Slide 23: Are there other Cu-Au mineral styles possible?
Are there other Cu-Au mineral styles possible? For personal use only Not only has the Petrology has identified a number of prospects throughout the Kanmantoo Province with the same vein/alteration paragenesis as Kanmantoo, the petrology has also identified • an Epithermal system in a diorite complex
Slide 24: Kanmantoo Cu-Au UG Progress
Kanmantoo Cu-Au UG Progress For personal use only For the latest update see Lachlan Wallace’ presentation to the Noosa Mining Conference of 10 November 2022 In the past year we have • Increased Cu metal in resources by 120% • Commenced both a decline and a ventilation drive • Developing a face/core
Slide 25: Thank You
For personal use only THANK YOU Chalcopyrite Molybdenite 25