HIGHLIGHTS
• Drill holes BTDD011 and BTDD012 intersected broad widths of lower grade porphyry Cu-Au mineralisation associated with the Discovery Outcrop zone in the north-eastern part of the Bottletree prospect. These results confirm that gaps between drill holes are mineralised and there is good continuity of mineralisation in that zone.
• BTDD011 includes:
o 463m @ 0.15% Cu, 0.02g/t Au and 9ppm Mo from 22m
o incl. 394m @ 0.17% Cu, 0.02g/t Au and 10ppm Mo from 55m
o incl. 264m @ 0.20% Cu, 0.02g/t Au and 13ppm Mo from 126m
o incl. 40m @ 0.30% Cu, 0.04g/t Au and 5ppm Mo from 127m
o incl. 57m @ 0.29% Cu, 0.04g/t Au and 28ppm Mo from 221m
o incl. 51m @ 0.28% Cu, 0.03g/t Au and 9ppm Mo from 339m
• BTDD012 includes:
o 433m @ 0.13% Cu, 0.01g/t Au and 2ppm Mo from 5m
o incl. 360m @ 0.15% Cu, 0.01g/t Au and 2ppm Mo from 77m
o incl. 32m @ 0.20% Cu, 0.03g/t Au and 2ppm Mo from 108m
o incl. 166m @ 0.19% Cu, 0.02 g/t Au and 3ppm Mo from 201m
o incl. 36m @ 0.27% Cu, 0.03g/t Au and 1ppm Mo from 201m
o incl. 33m @ 0.30% Cu, 0.02g/t Au and 3ppm Mo from 292m
o incl. 23m @ 0.36% Cu, 0.03g/t Au and 3ppm Mo from 302m
• BTDD013 targeted an area several hundred metres further south-west than previous drilling and intersected hundreds of metres of low grade Cu-Au mineralisation associated with weak to moderate biotite (potassic) and actinolite (calcic) alteraon in meta-andesite and minor intrusions. The extensive interval of mineralisation and alteration in BTDD013 is interpreted as an outer propylitic alteration halo that is less likely to be associated with the Discovery Outcrop zone, but more likely to be caused by a buried Cu-Au-bearing porphyry intrusion to the south-west.
• Results from BTDD013 support earlier modelling indicating that a porphyry potassic core is likely to be located several hundred metres to the south-west of the Discovery Outcrop.
• BTDD013 includes:
o 34m @ 0.05% Cu, 0.01g/t Au and 85 ppm Mo from 0m
o 18m @ 0.05% Cu and 9ppm Mo from 87m
o 332m @ 0.06% Cu, 0.01g/t Au and 31ppm Mo from 194m
o incl. 31m @ 0.10% Cu, 0.01g/t Au and 8ppm Mo from 402m
o incl. 11m @ 0.11% Cu, 0.02g/t Au and 5ppm Mo from 513m
• Higher grade Cu-Au mineralisation occurs in narrower zones of strongly foliated intervals within a broader zone of lower grade mineralisation. Predicting the extensions of these strongly foliated and mineralised intervals could be a useful exploration vector for further developing the dimensions of the Cu-Au-mineralised Discovery Outcrop zone.
• Veins typically associated with porphyry Cu-Au deposits (“A” and “D” veins) are recognised in Bottletree drill core. These veins are similar to those at the Cockie Creek Cu-Au Prospect. Both prospects have a sulphide mineral assemblage and associated hydrothermal alteration that is consistent with formation from relatively reduced magmatic-hydrothermal fluids associated with a reduced I-type volcanic arc magma (pyrrhote-bearing and general absence of primary anhydrite, gypsum, and hematite) (classified as ‘reduced porphyries’ as opposed to ‘oxidised porphyries’).
• Superior has been awarded a $300,000 Collaborative Exploration Initiative (CEI) Critical Minerals grant from the Queensland Government for the drilling of two deep diamond holes targeting the modelled core of the Bottletree porphyry Cu-Au-Mo system, located to the south-west of BTDD013.
Superior’s Managing Director, Peter Hwang commented:
“Results from the three 2023 drill holes have provided valuable information to enable further modelling of the Bottletree porphyry system in 3D. We are pleased to see the continuity of mineralisation being confirmed in the wall rocks at the Discovery Outcrop zone and importantly, that Hole 13 has provided important information to support the potential existence of a porphyry core several hundred metres to the south-west of the Discovery Outcrop. This effectively reinforces our 2023 porphyry vector modelling.
“Based on geological information from all holes drilled to date, our new 3D models have enabled us to further delineate a high priority porphyry core target, located about 700 metres to the south-west of the Discovery Outcrop.
“We are very excited about the modelled target, including its recognition by the Queensland Government with the recently announced $300,000 CEI Critical Minerals grant. The CEI grant will be applied directly to drilling of the porphyry core target and we are currently preparing logistics to enable commencement of drilling as soon as possible.
“Further details about the 2024 Bottletree drilling program as well as new exploration findings will be presented to the market in due course.”
Read the announcement via this link