OUR PROJECTS/GREENVALE Project

Bottletree

Bottletree, part of the southern Greenvale Project, is identified by a vast 2km x 1.5km soil copper anomaly. Recent exploration has significantly advanced our understanding of this promising porphyry Cu-Au-Mo prospect.

Recent Developments

  • A 2023 drilling program, targeted the extension of wall rock porphyry mineralisation associated with the Discovery Outcrop and a high-priority interpreted porphyry core.
  • Three holes (BTDD011, BTDD012, and BTDD013) were drilled, providing valuable data for 3D geological and mineralisation modelling.
  • Findings confirmed continuity of mineralisation within a broad zone associated with the Discovery Outcrop gossan, extending from surface to 850m down-dip, approximately 250m in thickness, and at least 250m in strike length.
  • Notable intersections include:
    • BTDD004: 632m @ 0.21% Cu, 0.03g/t Au, 0.60ppm Ag and 18.0ppm Mo from 5m
      • including 224m @ 0.40% Cu, 0.05g/t Au, 0.90ppm Ag and 3.5ppm Mo from 242m
      • including 103m @ 0.53% Cu, 0.05g/t Au, 1.4ppm Ag and 3.3ppm Mo from 363m
    • SBTRD006: 292m @ 0.22% Cu, including 18.7m @ 1.12% Cu
    • BTDD011: 463m @ 0.15% Cu, 0.02g/t Au and 9ppm Mo from 22m
    • BTDD012: 433m @ 0.13% Cu, 0.01g/t Au and 2ppm Mo from 5m
    • BTDD013: 332m @ 0.06% Cu, 0.01g/t Au and 31ppm Mo from 194m
  • BTDD013 intersected a broad zone of weak Cu mineralisation several hundred metres southwest of previous drilling, interpreted as an outer propylitic halo of a porphyry system. 
    • BTDD013 targeted an area several hundred metres further southwest than previous drilling and intersected hundreds of metres of low-grade Cu-Au mineralisation associated with weak to moderate biotite (potassic) and actinolite (calcic) alteration in meta-andesite and minor intrusions. 
    • Results from BTDD013 support earlier modelling indicating that a high-priority porphyry core target is likely to be located several hundred metres to the southwest of the Discovery Outcrop. This was further substantiated by results from a high-resolution gravity survey announced in August 2024 which highlighted a large prominent gravity anomaly in that same area.
    • 3D inversion modelling of the data indicates that there are two gravity anomalies that may converge into one body at depth. 
    • The Queensland government has backed the drilling of the interpreted porphyry core with the award of a $300,000 Collaborative Exploration Incentive (CEI) grant.

Geological Insights

  • Veins typical of porphyry Cu-Au deposits (“A” and “D” veins) were recognised in drill core.
  • The Bottletree system is classified as a ‘reduced porphyry system’, formed from relatively reduced magmatic-hydrothermal fluids associated with a reduced I-type volcanic arc magma.
  • Higher grade Cu-Au mineralisation occurs in narrower zones of strongly foliated intervals within broader zones of lower grade mineralisation.

 

Continued Exploration

  • Superior was awarded a $300,000 Collaborative Exploration Initiative (CEI) critical minerals grant by the Queensland Government for drilling two deep diamond holes targeting the modelled porphyry core.
  • The target is characterised by a large magnetic low, interpreted as a large, multiphase, non-magnetic, ilmenite-bearing, reduced I-type intrusion potentially sourcing the extensive Cu-Au-Mo mineralisation at Bottletree.

 

Exploration Strategy

  • The next drill program will focus on the newly identified porphyry core target approximately 400 metres southwest of previous drilling.
  • This strategy aims to further delineate the extent and nature of the porphyry system, building on the geological understanding gained from the 2023 program.

 

Bottletree continues to show promise as a significant component of Superior’s portfolio, with potential to host a large-scale porphyry copper-gold-molybdenum system within the Greenvale Project.

Satellite imagery (left) and TDr Vi NSSF-processed aerial magnetic imagery (right) of the Bottletree Prospect. Also shown are 2022 and 2023 drill program holes (blue trace) and the next stage porphyry core drill program holes (pink trace), which include planned CEI drill holes.
Satellite imagery (left) and TDr Vi NSSF-processed aerial magnetic imagery (right) of the Bottletree Prospect. Also shown are 2022 and 2023 drill program holes (blue trace) and the next stage porphyry core drill program holes (pink trace), which include planned CEI drill holes.
The 3D inversion modelling on the Bottletree gravity data has defined two distinct gravity-high features.
The 3D inversion modelling on the Bottletree gravity data has defined two distinct gravity-high features.
3D inversion density model of the high resolution Bottletree ground gravity survey showing the central gravity anomaly and the northeastern gravity anomaly as high-density 2.8t/m3 iso-surfaces, viewed obliquely (above) and plan view (vertical-down) (right). 2022 and 2023 drill holes shown in blue trace together with down-hole assay grade categories. Planned holes to test the central anomaly (including CEI-funded holes) shown in pink trace. Plan view shows the actual positions of drill holes relative to the gravity anomalies.
3D inversion density model of the high resolution Bottletree ground gravity survey showing the central gravity anomaly and the northeastern gravity anomaly as high-density 2.8t/m3 iso-surfaces, viewed obliquely (above) and plan view (vertical-down) (right). 2022 and 2023 drill holes shown in blue trace together with down-hole assay grade categories. Planned holes to test the central anomaly (including CEI-funded holes) shown in pink trace. Plan view shows the actual positions of drill holes relative to the gravity anomalies.
Bottletree

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