Porphyry-type mineralisation has been confirmed already. What...

Porphyry-type mineralisation has been confirmed already.

What has been found of it far is the wall rock section. Whilst some big copper mines eg Cadia in NSW have been created just with wall rock mineralisation, what is especially sought is the potassic core.

The core at Bottletree is what will be targeted with these 2 drilled holes, CEI 1 and CEI 2.

However, the wall rock mineralisation looks like being quite large.

This is from page 4

Based on 2022 drill holes, the wall rock porphyry zone extends from surface to at least 850m down dip depth, with a thickness of at least 250m. The strike extent of this zone has not yet been determined and remains open along strike and at depth.

This is from page 17 (my emphasis) .

Exploration at the Bottletree Prospect is at an early stage with only six holes, including BTDD011 and BTDD012 from the current program, drilled into the main zone of porphyry-style Cu-Au-Mo mineralisation. This mineralisation extends from surface to depths greater than 850m in BTDD010, although the causative porphyry intrusion(s) has not been identified. Extensive wall rock-hosted mineralisation within a large porphyry-style alteration shell has been intersected (Fig. 15):

BTDD004: 632m @ 0.21% Cu, incl. 224m @ 0.40% Cu (refer ASX announcement dated 2 June 2022);

BTDD005: 314m @ 0.13% Cu (refer ASX announcement dated 12 April 2023);

BTDD010: 73m @ 1,229.5ppm Mo, incl. 14m @ 6,000ppm Mo and 6m @ 13,900ppm Mo;

and SBTRD006: 292m @ 0.22% Cu (refer ASX announcement dated 25 October 2018).

Mineralisation is characterised by fine-grained sulphide disseminations and quartz-pyrite-chalcopyrite pyrrhotite ± molybdenite veins/veinlets in strongly deformed and metamorphosed volcanic and intrusive rocks. Consequently, the Bottletree Prospect is described as a “wall rock” porphyry with out-of-porphyry features (i.e., hydrothermal alteration and veins) developed in the wall rock used as vectors towards buried porphyry Cu mineralisation. Economic wall rock porphyry Cu-Au systems are common and include the deposits at Cadia and North Parkes in the Ordovician Macquarie Arc of New South Wales.