PACE Theme 2 (drilling partnerships with PIRSA and industry): Year 5 partnership DPY5-26 - south-western Cooper Basin district - Tertiary sedimentary uranium mineral prospects. Project interim and final reports.
Published: 31 Jan 1909 Created: 12 Nov 2024 Revised: 12 Nov 2024

As a PACE Initiative Year 5 drilling project that was approved for part-subsidy by PIRSA, a 16,777 m shallow rotary mud drilling programme was undertaken during the period August to November 2008 within five of the Sturt Joint Venture exploration...

As a PACE Initiative Year 5 drilling project that was approved for part-subsidy by PIRSA, a 16,777 m shallow rotary mud drilling programme was undertaken during the period August to November 2008 within five of the Sturt Joint Venture exploration licences near Moomba in north-eastern SA, at the start to a regional search for possible economic Kazakhstan-style secondary uranium mineralisation which could have formed within Tertiary sediments. Positive indicators for such prospectivity in this area were recognised as strong uranium radiometric anomalies recorded historically on gamma ray logs that had been run by Santos et al. in several previously drilled hydrocarbon wells. For the current search, investigation of the extent of preservation of porous sands in the target areas, and elucidation of the hydrological processes of uranium leaching and re-precipitation, were seen as being crucial to providing an understanding of local controls on any uranium mineral occurrence. To this end, 116 open rotary mud drillholes were completed in the vicinity of four previously much drilled oil and gas prospects (Big Lake, Daralingie, Moomba and Moorari). The holes were spudded into unconsolidated Quaternary sediments, and then passed into weakly consolidated Tertiary strata of the Namba and Eyre formations, wherein they all finished at an average TD of 145 m. Some of the drilling was undertaken near 20 of the historic petroleum wells that had known gamma ray anomalism within the Tertiary sequence: these radiometric anomalies were found and verified in the case of 10 of the re-drills. Another 24 of the PACE drillholes also encountered new significant gamma ray log anomalies (> 100 counts per second), with the sediments in two holes having > 300 cps, and those in another six holes having > 200 cps. The anomalies were observed to lie at several different stratigraphic levels within the upper Tertiary Namba Formation, which consists mainly of smectitic clay horizons that are irregularly interbedded with apparently discontinuous, unconsolidated sand bodies. The sand lenses appear to be suitable for undergoing in situ leach extraction of their contained uranium. Related, chemically anomalous mineralised intercepts were identified in a number of drillholes, the highest drill sample assay value being 254 ppm U over a 1 m thick interval at the Big Lake prospect. The as-yet unidentified uranium mineralisation seems to be localised on or near clay beds that bound oxidised sand units. It is concluded that, by so successfully proving the validity of the company's exploration model at this early stage of work, the results of the recent drilling have served effectively to reveal a previously unrecognised uranium province within SA.

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About this record

Record No mesac22329
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Amdel Ltd
Sponsor Crescent Gold NL
Tenement
Tenement Holder TC Development Corp. Pty Ltd;Uranium West Pty Ltd
Operator TC Development Corp. Pty Ltd
Geological Province Lake Eyre Basin
Mine Name Big Lake prospect;Daralingie prospect;Moomba prospect;Moorari prospect
Stratigraphy Namba Formation
Commodity uranium
Notes
Notes: PACE project code DPY5-26 : company submission includes exploration drilling actual total cost ($1,058,996.73 excluding Goods and Services Tax), out of which PACE Initiative funds have paid $50,000.00 (excl. GST).   PDF will be updated once...

Notes: PACE project code DPY5-26 : company submission includes exploration drilling actual total cost ($1,058,996.73 excluding Goods and Services Tax), out of which PACE Initiative funds have paid $50,000.00 (excl. GST). PDF will be updated once minor additional data is received (26 Oct. 2010). Geographic Locality: Strzelecki Desert Doc No: Env 11926 Drillhole: BL001 - BL066;D001 - D040;MB001 - MB003;MB006;MB007;MB009;MB010;MB012 - MB014;MR001 - MR003;Santos Big Lake 20;Santos Deina 1;Santos Verdelho 1 Drillhole Unit No: 6941 00550;THROUGH;6941 00612;6841 00268;6841 00300;6941 00620;THROUGH 6941;6942 00368;6942 00369;6942 00370

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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/mesac22329
Citation Waterhouse, J.R.;Radke, F. 1909. PACE Theme 2 (drilling partnerships with PIRSA and industry): Year 5 partnership DPY5-26 - south-western Cooper Basin district - Tertiary sedimentary uranium mineral prospects. Project interim and final reports. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac22329

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[139.5,-28.5],[140.5,-28.5],[140.5,-27.5],[139.5,-27.5],[139.5,-28.5]]]}
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