Data release - as updated [made at SA Director of Mines’ discretion] : Arkaroola. Annual reports for the period 5/12/2008 to 3/12/2015.
Published: 20 Jan 1916 Created: 12 Nov 2024 Revised: 12 Nov 2024

During the 2008-2009 licence year, most of the new work done consisted of appraisal rotary mud drilling at Four Mile East (112 holes for 24,460 m) and Four Mile West (113 holes for 19,120 m), with the addition of one NQ diamond cored hole (AKC093)...

During the 2008-2009 licence year, most of the new work done consisted of appraisal rotary mud drilling at Four Mile East (112 holes for 24,460 m) and Four Mile West (113 holes for 19,120 m), with the addition of one NQ diamond cored hole (AKC093) for 213 m at Four Mile West. Other major activities begun and/or completed by the joint venture partners as part of mining pre-feasibility studies included: mineralogical characterisation of Four Mile East ore; bench leach testing of highly carbonaceous Four Mile East ore; pump testing of mineralised aquifer horizons at Four Mile West, including the installation of pumps and the setting up of groundwater monitoring wells; and, the preparation of an updated resource statement for Four Mile West. During the 2009-2010 licence year, new work comprised the casing and completion of 17 earlier drilled two-stage ore zone monitoring wells at Four Mile East and Four Mile West, plus the conduct of a check palynological analysis of drill core sediment samples taken from, and groundwater monitoring of, existing wells. The groundwater data collected from these wells provided information about the hydrogeochemistry, groundwater potentiometric levels and regional groundwater flow characteristics of the aquifer systems. The palynology confirmed that most of the Four Mile East mineralisation is hosted by Eocene alluvial sediments, whilst at Four Mile West uranium mineralisation lies almost exclusively within Cretaceous glacial sediments. Plans proposing to do a field leaching trial were finalised and submitted to PIRSA for regulatory approval. During the 2010-2011 licence year, the JV partners acquired 122 line km of shallow 2D reflective seismic survey Vibroseis data to map the subsurface stratigraphy and structure in the Four Mile Creek area and to try to detect any geophysical signatures of the uranium mineralisation. In addition, during October 2010 a small part of a multi-licence CSAMT survey was acquired over EL 2666 (2.3 line km along the ends of two survey lines). Palynological samples from seven cored holes previously drilled in the vicinity of the Four Mile East deposit were examined by a consultant, with the intent of more accurately defining the age of stratigraphic units within the Eyre Formation host. The work confirmed that these sediments are Eocene and that they most likely accumulated in shallow freshwater to subsaline environments. During the 2011-2012 licence year, under tenure of renewed EL 5017, Quasar Resources performed laboratory-based quantitative mineralogical analyses on 10 uranium-bearing drill core samples from holes it had previously drilled at Four Mile East. The intent was to determine the bulk mineralogy and mode of occurrence (mineral textures and liberation characteristics) of the uranium species occurring in places targeted for future mining. Whole rock geochemical analysis and clay mineral identification were important parts of this work. The resulting data confirmed that the main uranium bearing minerals exist as uraninite-silicate intergrowths. Mineral disposition micromaps indicated that the uranium phases coat the surface of quartz grains, a geometry which would enable leach liquors to readily access uraninite. Three Work Area Clearance (WAC) surveys were completed in May and June 2012 with representatives of the Adnyamathanha Native Title holders accompanied by specialist cultural heritage consultants. A clearance was granted at Four Mile West for well installation, and for a 75 m wide corridor east of Four Mile East for the development of an access road to service future wellfields. Clearance for exploration drilling was also granted for the area surrounding the Four Mile deposits. On 26/4/2012 a Mineral Lease, ML 6402, was granted to the JV partners by DMITRE, that covers the 63 minerals claims formerly issued in May 2008 to give title to the Four Mile uranium deposits. During the 2012-2013 licence year, the only work undertaken was the acquisition of part of a multi-licence airborne gravity gradiometer (AGG) and magnetic survey over the northern part of the licence area during July 2013. A total of 1896.4 line km was flown along NE-SW flight lines 150 m apart, using a 100 m nominal terrain clearance. The AGG data were expected to provide key new information on the granite intrusions and to possibly detect signatures of buried IOCG and/or BHT deposits. Processed and gridded survey data were supplied to Quasar, and their interpretation was commenced. During the 2013-2014 licence year, Quasar received interpretations for both the 2011 seismic survey and the 2013 AGG-magnetic survey. Interpretation of the airborne survey data was integrated by the consultant with mapped geology and historic data from exploration, and selected geophysical responses were highlighted on 1:100k maps that depict key data as recognised both pre- and post the new survey. Seven high priority targets were proposed from amongst 14 significant anomalies in the Parabarana area and seven in the Mount Babbage area that were studied, and recommendations were made for follow-up ground geophysics to better define them. The seismic interpretation was performed by local tenement operator Heathgate Resources, who subdivided the seismic dataset into three broad geological domains based principally on seismic characteristics and structural setting. Aided by drillhole data, stratigraphic units were able to be identified within the seismic profiles and the extents of the Eyre Formation and Cretaceous sediments were mapped. Seismic data were converted from time to depth based sections with an accuracy of +10 m. Accurate depth conversion enabled estimation of depth to basement and formation thicknesses. Major geological structures, such as faults and sub-basins, were interpreted and confirmed, where possible, by pre-existing drilling. Seismic attribute analysis was undertaken to determine if attributes calculated from the amplitude, frequency and phase of the seismic data could be used to aid interpretation and possibly characterise uranium host formations. The majority of attribute datasets displayed features already present in amplitude data; however, spectral decomposition appeared to highlight some specific regions over others. Nevertheless, the highlighted areas in the data did not correspond with known mineralisation or sand bodies and provided no significant benefit to the interpretation. Due to the nature of some geological units and increased geological complexity in general, interpretation proved difficult in some critical areas, especially where Cretaceous sediments lacked reflectivity or where stratigraphic units were less than 5 m thick. Additionally, the Four Mile Basal Conglomerate and Four Mile Diamictite in the Four Mile deposits area were unable to be distinguished from the overlying Bulldog Shale. Shallowing basement south of the Four Mile deposits reduced data quality, and variable topography made mapping of stratigraphic horizons difficult. During the 2014-2015 licence year, Quasar purchased the remaining 25% of joint venture interests for the subject licence from Alliance Craton Explorer Pty Ltd, thereby reaching full ownership. The only exploration activity comprised making an aerial reconnaissance of the northern part of EL 5017, to scout ground access conditions for accessing IOCG prospective locations there that had been identified from the 2013 AGG-magnetic geophysical survey. A proposal was prepared for conducting a seismic reflection survey to map structuring across the Paralana Fault zone to the north-east of the Four Mile East deposit, and also determine the dip angle of the fault face.

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About this record

Record No mesac26850
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Australian Nuclear Science and Technology Organisation (ANSTO), Minerals Div.;GroundProbe Geophysics Pty Ltd;Morgan Palaeo Associates Consultant Palynological Services;ALS Ammtec, Mineralogy Group;Fugro Airborne Surveys Pty Ltd;Southern Geoscience Consultants Pty Ltd;Heathgate Resources Pty Ltd;Dynamic Satellite Surveys Pty Ltd;Terrex Seismic Pty Ltd;GroundProbe Geophysics Pty Ltd;Velseis Processing Pty Ltd
Sponsor Heathgate Resources Pty Ltd
Tenement
Tenement Holder Quasar Resources Pty Ltd;Alliance Craton Explorer Pty Ltd
Operator Quasar Resources Pty Ltd
Geological Province
Mine Name Four Mile East uranium deposit;Four Mile West uranium deposit
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. On 22/7/2011, the Premier of South Australia, the Hon Mike Rann MP, announced establishment of the Arkaroola Protection Area (APA) comprising an area of 463.2 square km which then lay within the subject EL 3666. By SA Parliamentary proclamation, the designated area was henceforth reserved from operations under the South Australian Mining Act, such that no future exploration and mining titles could be granted there. On 31/8/2011, the licensees applied for a replacement exploration licence (EL 5017) over the remnant 784.6 square km of ground on EL 3666 not affected by the APA. Includes: - Grigore, M. and Ring, R.J., January 2009. Report on a mineralogical [XRF/SEM/XRD] examination of Four Mile samples (ANSTO Minerals report for Quasar Resources). Appx 4 of EL 3666 third annual report to 4/12/2009. 72 pages, figures, plates, 4 ref, tables; - Heathgate Resources Pty Ltd, 2009. Draft report on Four Mile West, pre - Field Leach Trial, hydrogeology study. Appx 5 of EL 3666 third annual report to 4/12/2009. 14 pages, 12 fig; - Macphail, M., 27/1/2011. [Report on] Palynostratigraphic age determinations, Four Mile East and Pannikan prospect drillholes AKC021, AKC028, AKC039, AKC054, AKC078, AKC085, PRC019 and PRC022, northern Frome Embayment, South Australia (Morgan Palaeo Associates consultant's report for Heathgate Resources). Appx 3 of EL 3666 fifth annual report to 4/12/2011. 52 pages, 3 appx, plates, references, 3 tables; - Isles, D., January 2014. EL 5017 (including Parabarana and Mount Babbage) airborne gravity, magnetic and radiometric surveys: interpretation and targeting report (Southern Geoscience Consultants report for Quasar Resources/Heathgate Resources). Attachment 2 in EL 5017 third annual report to 3/12/2014. 84 pages, 3 appx, 10 fig, 2 tables; - Heathgate Resources Pty Ltd, July 2014. Arkaroola seismic interpretation [report] - EL 5017 Arkaroola and ML 6402 (Four Mile). Attachment 1 [including later added appendices] in EL 5017 third annual report to 3/12/2014. 55 pages, [6 appx], 22 fig, 11 ref, 2 tables. Geographic Locality: North-eastern Flinders Ranges;Arkaroola Station;Arkaroola Protection Area;2010 Arkaroola CSAMT Survey;2011 Paralana Embayment 2D Seismic Survey;2013 Flinders Ranges Aerial Gravity (Falcon gradiometer) Survey;2013 Flinders Ranges Aerial Magnetic Survey Doc No: Env 09205 Drillhole: 4LMW003 - 4LMW017;(257122);(257123);4MT001;4MT002;AK1002 - AK1113;AKC153;AKWW4;AKWW5;FE0004 - FE0139;FED0035 - FED0146;FW0001 - FW0012;WC01;WC02;WC04;WC05;WC07;WE01 - WE04;WE07;WE08;WF01 - WF05;WF08;AKC064;(257609);AKC152;(257698)

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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/mesac26850
Citation Packer, B.;McConachy, G.J.;Grigore, M.;Ring, R.J.;Adam, E.;Macphail, M.;Keatley, K.;Simper, J.;Reeve-Fowkes, M.;Isles, D.;Hausmann, D.;Dunn, G.;Hewett, A. 1916. Data release - as updated [made at SA Director of Mines’ discretion] : Arkaroola. Annual reports for the period 5/12/2008 to 3/12/2015. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac26850

Technical information

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