Data release - as updated [made at SA Director of Mines' discretion] : Fowlers Bay (part of the Western Gawler JV Project). Annual report for the period 9/3/2015 to 8/3/2018.
Created: 12 Nov 2024 Revised: 12 Nov 2024

During the 2015-2016 licence year, the Western Gawler JV Project exploration operator Western Areas Limited (WSA) conducted the first part of a regional reconnaissance bedrock drilling campaign targeting aeromagnetic anomalies which were...

During the 2015-2016 licence year, the Western Gawler JV Project exploration operator Western Areas Limited (WSA) conducted the first part of a regional reconnaissance bedrock drilling campaign targeting aeromagnetic anomalies which were interpreted to represent buried mafic/ultramafic igneous intrusions that might have magmatic Cu-Ni-PGEs potential. In October-November 2015, two prospects located on renewed EL 5880 were tested by drilling 11 vertical open aircore/RC holes for a total penetration of 655 m, as part of a broader multi-licence drilling campaign. Most of the holes encountered basement comprised of felsic gneiss, however, hole WGAC0098 targeting a circular magnetic low encountered an intermediate igneous rock (diorite). The only sulphide mineral visible within it was pyrite, and this appeared from the drill cuttings to be pervasive and potentially hydrothermal in origin. The diorite also appeared to be cross-cut by a series of felsic (aplitic) and mafic (basaltic) dykes. Assaying of 218 selected 1-metre depth interval drill cuttings samples did not return any values indicative of nickel sulphide mineralisation. However, low levels of gold, up to 21 ppb Au, supported by elevated Bi, Nb, and U values, were detected in a number of the holes drilled, attesting to significant hydrothermal activity locally. Specialist geochemical consultants Reflex Geochemistry were commissioned by WSA to review the new drillhole geochemical data. They applied a number of multivariate numeric analytical criteria in an attempt to define the metal distribution, lithological and alteration geochemistry and general prospectivity of the Fowler Project area. They concluded that although absolute metallic trace element concentrations are significantly below economic levels, statistically anomalous values could be seen to form coherent trends, both chemically and spatially. As the source drillholes are widely spaced, these results provided encouragement for the project. During the 2016-2017 licence year, the regional scale geophysical targeting and geochemical reconnaissance drilling program continued, and ground gravity surveys were completed. The drilling program saw 3 aircore holes for a total of 157 m completed across 2 locations in follow up to coincident magnetic and gravity anomalies. Two of the 3 holes intersected basement, with hole WGA0118 abandoned in clay and re-drilled as WGA0118A. Hole WGA0117 intersected a felsic to intermediate gneissic sequence, weak disseminated pyrite was noted at the end of hole, hole WGA0118A intersected similar rocks, with trace pyrite associated with chlorite alteration. No anomalous geochemistry results were returned. Alongside the drilling program 2 ground gravity surveys were completed in the far southern (Area 4) and central portions (Area 3) of the tenement by Atlas Geophysics as part of a wider gravity acquisition. Surveys were completed on 500 m line spacing with a station spacing of 250 m, with a total of 1119 stations read (613 Area 3, 506 Area 4) using a CG-5 Autograv Gravity Meter. A total of 40 passive seismic stations was also acquired across the broader program using three Tromino 3G Seismometers. Consultation with Traditional Owners and relationship building has continued, and following on from a successful heritage survey in November 2016, access for exploration within the Yalata Aboriginal Reserve was granted. During the 2017-2018 licence reporting year, eleven aircore holes (WGAC0145-0155) for 531 m were drilled within the Yalata Aboriginal Reserve. The drilling was undertaken as follow up to the 2016 drilling program, on coincident magnetic and gravity anomalies. All holes successfully reached basement and intersected a range of basement lithologies including felsic to intermediate granitic gneiss and amphibolite gneiss, weakly disseminated pyrite was noted in select holes, and no mafic intrusives were intersected. Assay data was collected over selected intervals of the drilling as determined by geological logging with back-up portable XRF screening of every drill metre, 184 samples were selected for laboratory analysis. Hole WGAC0152 returned a regionally anomalous copper value, with 821 ppm Cu.

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About this record

Record No mesac29636
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor
Sponsor
Tenement EL 5880
Tenement Holder Strandline Resources Limited;Western Areas Limited
Operator Western Areas Limited
Geological Province
Mine Name Wasteland prospect;Gas Town prospect
Stratigraphy
Commodity
Notes
Notes: This release to the public of the subject mineral exploration data, namely, company data which was acquired more than 5 years ago, is being done by DEM in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88 of...

Notes: This release to the public of the subject mineral exploration data, namely, company data which was acquired more than 5 years ago, is being done by DEM in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88 of the Mining Regulations 2011. Includes: - Sugden, S., March 2016. Western Gawler [Project] aircore drilling [basement trace element geochemistry] review (Reflex Geochemistry consultant's report for Western Areas). Appx 2 of EL 5880 annual report to 8/3/2016. 140 pages, figures, tables. - Fletcher, Z. 6th September 2017. Memorandum: Western Gawler & Nullarbor Gravity Surveys. Western Areas Limited. Atlas Geophysics Pty Ltd. Appx. 2 to annual technical report to 8th March 2017. Pg. 823 Geographic Locality: Fowlers Bay;Eyre Highway;Great Victoria Desert;Coorabbie Fault Zone;Yellabinna Regional Reserve;Yalata Aboriginal Reserve;2016 Western Gawler & Nullarbor Gravity Surveys [Part] Doc No: Env 11220 Drillhole: WGAC0074 - WGAC0076;(364368 - 364370);WGAC0094 - WGAC0098;(364388 - 364392);WGAC0108 - WGAC0110;(364402 - 364404)

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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/mesac29636
Citation O'Neill, D.;Gribbin, G.;Gregory, I. Data release - as updated [made at SA Director of Mines' discretion] : Fowlers Bay (part of the Western Gawler JV Project). Annual report for the period 9/3/2015 to 8/3/2018. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac29636

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[132,-32],[133,-32],[133,-31],[132,-31],[132,-32]]]}
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