The Eyre Peninsula Project, and in part the Corrobinnie Uranium Joint Venture. Joint annual reports for the period 29/12/2008 to 31/12/2013.
Published: 05 Mar 1914 Created: 12 Nov 2024 Revised: 12 Nov 2024

During the sixth year of the project, licensee Adelaide Resources did not do any exploration directed at gold or base metals that might possibly occur on the subject tenements. However, its joint venture partner Quasar Resources undertook...

During the sixth year of the project, licensee Adelaide Resources did not do any exploration directed at gold or base metals that might possibly occur on the subject tenements. However, its joint venture partner Quasar Resources undertook significant exploration for sandstone style uranium mineralisation that might exist in the buried Cainozoic sediments of the Thurlga Palaeochannel where it crosses the northern Eyre Peninsula and southern Gawler Ranges. Sites for reconnaissance drilling traverses were based on DEM images and on previous palaeochannel interpretations, the aim being to further define the location and extent of the Thurlga Palaeochannel system. 157 vertical, 89 mm diameter open aircore drillholes were completed for a total penetration of 6004 m on the Mount Ive, Thurlga, Pinkawillinie and Corrobinnie exploration licences, and were sampled geochemically and wireline logged geophysically with calibrated downhole gamma ray probes. The highest uranium geochemical assay result obtained was 256 ppm U3O8 in hole CBA005. Drillhole spacing was ~400 m along the traverses. Holes were intended to reach basement where possible and sample it for lead-zinc prospectivity. The deepest hole was THA024 at 96 m. During the seventh year of the project, licensee Adelaide Resources did not do any exploration directed at gold or base metals that might possibly occur on the subject tenements. However, its joint venture partner Quasar Resources continued with its drilling campaign targeting possible economic roll front style sedimentary uranium that might exist within the Tertiary Thurlga Palaeochannel sediments. 144 vertical open aircore or rotary mud drillholes for 6279 m were completed along 14 reconnaissance traverses on the Thurlga, Pinkawillinie and Corrobinnie exploration licences. The highest uranium geochemical assay result obtained was 2 m @ 338 ppm U3O8 from 30 m depth in hole CBM0007. The locations of drill traverses were based on those of palaeovalleys interpreted from the DEM, newly acquired airborne EM data, and previous drilling. Each traverse was intended to test the width and thickness of any channel fill, and the sediments' prospectivity all the way across the palaeovalley. Three of the drill traverses (TPC04, TPC05 and TPC11) were designed to test for both palaeochannel U mineralisation (at their eastern and southern ends) and basement U/Pb/Zn/Au mineralisation (at their western and northern ends). The drill traverses for the rotary mud programme followed up anomalous uranium intersected in the 2009 aircore drilling programme (on TPC09 and TPC10) and further tested those areas where aircore drillholes (in both the 2009 and 2010 programmes) were unable to reach basement (TPC06, TPC12, TPC13 and TPC14). The drill collar spacing was about 400 m along the traverses. This was reduced to 200 m around those drillholes where anomalous downhole gamma ray log readings were detected. Holes were typically drilled down to a depth of blade refusal. Quasar geophysically logged its 2010 programme drillholes using two methods: - in 81 of the aircore holes, logging was done from inside the drill rods using Heathgate Resources' Auslog equipment; and - in 36 of the rotary mud holes, the logging was performed in an open hole environment using Geovista equipment. The Auslog data were collected with one gamma sonde and used to calculate the equivalent uranium grade (eU3O8). The Geovista data were collected to ascertain both eU3O8 and lithology. Selected drill cuttings samples which were submitted for laboratory geochemical assaying also provided information about radiogenic disequilibrium. Significant uranium intercepts were logged in 18 of the 2010 campaign drillholes, half from palaeochannel sand units and half from weathered basement. The most notable intercepts of the former kind occur near the junction of traverses TPC09 and TPC10. Other, smaller anomalous zones were intersected along TPC06 and TPC14. One large zone of uraniferous weathered basement was intersected along several traverses: TPC03, TPC04 and TPC11. The largest anomaly occurs as a radiogenic anomaly in four drillholes (CBM0006, CBM0007, CBM0008 and CBM0016) and is supported with assay results in two (CBM0006 and CBM0007).This anomalous area lies to the north of a large magnetic anomaly which has not been tested. Follow-up drilling of anomalous uranium values in weathered basement from the 2009 aircore programme results revealed further such anomalies. The elevated uranium values are associated with drill cuttings containing mica and/or foliated granite, which also have anomalous vanadium. The overall anomalous area is narrow (1 km generally to ~100 m if closer testing of anomalous gamma ray log responses was needed. 114 of the holes were wireline geophysically logged. In-field FPXRF assaying of drill cuttings samples produced a best uranium result of 552.5 ppm U from hole PDA079, plus another notable intercept in hole CBA073 of 9 m @ 170 ppm U from 29 m depth. The FPXRF intercepts occur at local redox boundaries in near surface reduced sediments that are not necessarily palaeochannel fill strata, at depths between 25 m and 40 m. Geophysical logging of the holes with a gamma ray sonde yielded significant grade-thickness values at depth near basement in six holes, including a best intercept of 841 ppm eU3O8 in hole PDA098 from the depth interval 92-94 m. This palaeochannel hosted occurrence lies within a matrix of sub-rounded quartz gravels and kaolinitic clays (weathered granite), within the Narlaby Palaeochannel at the northern extent of traverse TR08. On EL 4145, it was observed during onsite XRF assaying that almost all holes with elevated uranium at a particular depth also had elevated molybdenum within the same interval. Barium, potassium and gold also appeared to have a spatial association with uranium in some cases. On EL 4214, in a more neutral redox environment, the XRF instrument recorded repeated associations of the elements barium, selenium, tungsten, cobalt and manganese. The basement lithologies encountered were either granite saprock or a dark grey meta-sandstone. During the ninth year of the project, no uranium exploration was done. 46 selected drill cuttings samples from the 2491 x 1-metre samples recovered during drilling, that had given elevated FPXRF uranium content readings, were sent for laboratory multi-element chemical analysis. A maximum value of 133 ppm Au was returned from the depth interval 22-24 m in aircore hole PKA042. During the tenth year of the project, in mid-February 2013, Quasar decided to leave the principal joint venture without doing any further uranium exploration work. The company had spent A$4.3M over 6+ years to earn a 67.46% interest in the project, which was fully transferred back to Adelaide Resources for no consideration. Efforts were set in train to attract new joint venture funds to the project. Adelaide Resources resumed managing the project exploration commitments, and submitted to DMITRE a Declaration of Environmental Factors (DEF) for a programme of biogeochemical sampling, soil and calcrete geochemical sampling and drilling that was planned to be conducted at the still unexplained large Empire geochemical anomaly on EL 5120, within the Pinkawillinie Conservation Park. EL 4792 Mount Ive was fully surrendered on 18/10/2013.

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About this record

Record No mesac27017
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Geosolutions Pty Ltd
Sponsor Quasar Resources Pty Ltd
Tenement
Tenement Holder Peninsula Resources Limited;Quasar Resources Pty Ltd
Operator Adelaide Resources Limited;Quasar Resources Pty Ltd
Geological Province
Mine Name
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 DMITRE in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88...

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 DMITRE in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88 of the Mining Regulations 2011. The Corrobinnie Joint Venture agreement made between Adelaide Resources Limited and Quasar Resources Pty Ltd, which applied to nine of the Eyre Peninsula Project tenements, was in force from 21/11/2006 until 19/2/2013, allowing Quasar to explore there for uranium. Includes: -Olliver, J.G., December 2012. Graphite [prospectivity] on Eyre Peninsula (Olliver Geological Services Pty Ltd consultant's report for Adelaide Resources). Appendix B in project licences' joint 2012 annual report to 31/12/2012. 22 pages, 9 fig. Geographic Locality: West-central Eyre Peninsula;Kyancutta;Minippa;Kimba;Lock;Gawler Ranges National Park;Pinkawillinie Conservation Park;Lake Acraman;Thurlga Palaeochannel;2010 Thurlga Project Aerial TDEM (REPTEM) Survey;2010 Eyre Peninsula JV Project Aerial EM Survey Doc No: Env 10624 Drillhole: CBA001 - CBA023;(306226 - 306334);CBM0001 - CBM0016;(306335 - 306350);MVA001 - MVA095;(267158 - 267195);(284625 - 284681);PKA001 - PKA033;(306239 - 306250);(306351 - 306371);THA001 - THA114;(306251 - 306287);(306372 - 306448);THM0001 - THM0020;(306449 - 306468);CBA024 - CBA114;(340935 - 341025);PDA069 - PDA088a;(341026 - 341046);PDA089 - PDA098;(341047 - 341056);PKA034 - PKA073;(341057 - 341096)

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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/mesac27017
Citation Drown, C.G.;McAvaney, D.J.;Caon, J.;Barnes, J.;Hewett, A.;Anderson, B.E.;Simper, J.;Manly, M. 1914. The Eyre Peninsula Project, and in part the Corrobinnie Uranium Joint Venture. Joint annual reports for the period 29/12/2008 to 31/12/2013. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac27017

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[134.5,-33.5],[136.5,-33.5],[136.5,-31.5],[134.5,-31.5],[134.5,-33.5]]]}
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