PACE Theme 2 (drilling partnerships with PIRSA and industry): Year 3 partnership DPY3-06, Benagerie Ridge Joint Venture area iron oxide - associated copper-gold mineral prospects. Project interim and final reports.
Created: 29 Oct 2024 Revised: 07 Dec 2024

The PACE Initiative drilling collaboration proposal DPY3-06 was formulated to drill test three gravity - (magnetic) anomalies seen along the buried Benagerie Ridge area of the Curnamona Province of South Australia, on EL 3019 (Quinyambie Station)...

The PACE Initiative drilling collaboration proposal DPY3-06 was formulated to drill test three gravity - (magnetic) anomalies seen along the buried Benagerie Ridge area of the Curnamona Province of South Australia, on EL 3019 (Quinyambie Station) which is situated about 130 km north-northwest of Broken Hill. The targeted mineralisation is of the iron oxide - associated copper-gold (IOCG) style, possibly occurring in association with inferred Mesoproterozoic basement volcanic and intrusive acid igneous rocks. One vertical rotary mud/diamond cored drillhole was completed on each of the three targeted anomalies, for an aggregate drill penetration of 1128.2 m, including 633.2 m of coring. In each case, the depth of cover proved to be less than expected (by around 75 m on average), and the basement lithology encountered is a massive, reddened quartz-feldspar porphyritic rhyolite or green/grey dacite that does not contain significant veining or brecciation. Only very minor fracture-filling thin veins reflecting weak quartz - sericite - carbonate - pyrite alteration were seen in the drill cores. Assaying of 2 m drillhole samples for a suite of metallic elements returned very low values throughout, with a maximum gold value of 78 ppb in BRD003 corresponding with a 4 mm wide vein running subparallel to the core axis below 334.8 m depth. Specific gravity measurements that were done on basement rhyolite cores from 2 of the PACE drillholes averaged 2.60 g/cubic cm, a value which is similar to results obtained from other previously drilled nearby holes. Simple gravity modelling was performed using actual depths to basement, specific gravity values for cover sediments (2.0) and basement (2.60), plus a range of plausible ridge-flank slope angles, and the models indicated that the observed gravity anomalies of 1-2 mGal may be due solely to basement topographic effects. The lack of proximal indicators of mineralisation in the PACE hole basement drill cores supports this hypothesis at this stage.

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About this record

Record No mesac21490
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Daishsat Pty Ltd
Sponsor Newcrest Mining Ltd
Tenement EL 3019
Tenement Holder Platsearch NL;Newcrest Mining Ltd
Operator Newcrest Operations Ltd
Geological Province
Mine Name Gravity anomalies 'B', 'E' and 'F'
Stratigraphy
Commodity
Notes
Notes: PACE project code DPY3-06 : company interim and final submissions include exploration drilling actual total cost ($395,235.48 excluding Goods and Services Tax), out of which PACE Initiative funds have paid $100,000.00 (excl. GST)....

Notes: PACE project code DPY3-06 : company interim and final submissions include exploration drilling actual total cost ($395,235.48 excluding Goods and Services Tax), out of which PACE Initiative funds have paid $100,000.00 (excl. GST). Includes, as Appendix 4 of the project final report, a contractor's operations report about the acquisition of gravity data for Newcrest in August-September 2005, which data were used to generate the subject PACE project drill targets. 2293 new gravity stations were read on a 500 m x 500 m spaced grid, as infill to earlier SAEI/PACE-funded regional 2 km x 2 km gravity coverage in the Benagerie Ridge area. Geographic Locality: Eastern Lake Frome Plains;Quinyambie Station;2005 Benagerie Gravity Survey Doc No: Env 11341 Drillhole: BRD003;BRD004;BRD006 Drillhole Unit No: 6936 00100;6936 00101;6936 00103

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Language English
Metadata Standard ISO 19115-3

Citations

Use constraints License
License Creative Commons Attribution 4.0
Persistent identifier https://pid.sarig.sa.gov.au/document/mesac21490
Citation Harper, B.;Langmead, R.;Stewart, M.A.;Mathews, L.R. PACE Theme 2 (drilling partnerships with PIRSA and industry): Year 3 partnership DPY3-06, Benagerie Ridge Joint Venture area iron oxide - associated copper-gold mineral prospects. Project interim and final reports. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac21490

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
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