The Northern Eyre Peninsula JV Project. Data release made in lieu of submitting a licence final report at the full surrender of EL 5170 Kimba Gap: Joint annual reports for the period 1/2/2013 to 9/2/2017.
Published: 25 Sep 1918 Created: 12 Nov 2024 Revised: 12 Nov 2024

During the Northern Eyre Peninsula Project (NEPP) 2013-2014 reporting year, exploration field work took place on two of the six project tenements. On EL 4884 Minbrie, a single 151 m deep vertical RC drillhole, BURC092, was completed in August...

During the Northern Eyre Peninsula Project (NEPP) 2013-2014 reporting year, exploration field work took place on two of the six project tenements. On EL 4884 Minbrie, a single 151 m deep vertical RC drillhole, BURC092, was completed in August 2013, to allow one of Centrex Metals’ drilling contractors to test their new drill rig in well-known (to them) ground conditions and geology. This hole was logged, and its iron ore intervals were sampled but not assayed. The magnetite BIF intercepts, and the unconfined saline aquifer in the fractured bedrock, were encountered at their expected depths. This result indicates that the current geological model for the south-western end of the Bungalow Zone 36 orebody is good. On EL 5170 Kimba Gap, 4 inclined HQ or NQ2 diamond cored holes with a total penetration of 831.1 m (KI001 - KI004) were drilled on a low-lying ESE-WNW traverse section across the South Camel Hill ridgelines during February-March 2013, at a nominal hole spacing of ~90 m. 165 drill core samples (including field duplicates) were submitted for assays and DTR testing. A conceptual exploration target was announced in May 2013 based on this drilling, and was updated in July 2013 to include similar BIF iron ore expected to occur in the adjoining EL 4732 Designated Area. The total exploration target at South Camel Hill is now 330 to 500 Mt of magnetite iron ore with a Davis Tube Recovery (DTR) concentrate grade range of 21-27% Fe. A second drilling and sampling programme is planned to commence in the near future to test this exploration target. The BIF units drilled by holes KI001 to KI004 are part of a stratigraphic sequence similar to that at the Bungalow prospect, but apparently lack Bungalow’s variety of younger granitic intrusions. At South Camel Hill, the drilling encountered two major westwards dipping intervals of Lower Middleback Jaspilite BIF that are separated by sheared rocks, so they may represent a tectonic repetition rather than the limbs of a large fold structure. Currently they are referred to as “western slab” and “eastern slab”. Both slabs are ~85 m thick and outcrop along the length of the South Camel Hill ridgeline; but many of the exposure locations are smothered by their own weathering rubble or by the rubble transported from outcrops uphill from them. The eastern slab of magnetite BIF is underlain by dolomitic marble and cut by weathered fault zone(s). The marble itself overlies muscovite schists and gneisses. The western slab of magnetite BIF includes numerous minor folds, often faulted, in its upper layers. Its lower layers, like the eastern slab’s layers in general, exhibit few folds. Hole KI001 at the south-eastern end of the drill traverse intersected numerous thin fault zones containing brecciated ore horizons. Fluids passing along these zones have deposited quartz and calcite within the fractures, and promoted the weathering of the magnetite within nearby ores. AEC Environmental was contracted by Centrex Metals to perform laboratory mineralogical XRD analyses on selected drill core samples to help identify the constituent minerals and original rock types, since much of the cored bedrock consists of saprolite. At Bungalow prospect, ongoing environmental data sampling throughout the reporting period included baseline weather and dust monitoring, from a measuring station located behind the “Bungalow” homestead, and the monitoring of groundwater levels in observation water bores established around the proposed Bungalow mine site. EL 4883 Cockabidnie, in the Campoona Syncline region, is located north-west of Cleve on central Eyre Peninsula. Lincoln Minerals did not do any field work there during 2013-2014, however, a review was made of historic drill cores from the area that are held within the State's core libraries, and some core materials were sampled and assayed for carbon and total graphitic carbon (TGC). The assay results ranged up to 15.8% TGC. No interpretation or modelling has yet been undertaken on the 2012 Cockabidnie airborne EM survey data, but it was found from an initial inspection of the AEM data that extensions of Archer Exploration Limited’s Campoona Hill and Sugarloaf Hill EM anomalies, and Monax Mining Limited’s Jamieson Tank and Wilco EM anomalies, extend onto EL 4883. There are subtle but significant AEM anomalies in the Campoona Syncline area which correspond to graphite intersections identified in historic drilling done by CRA Exploration Pty Ltd (CRAE) in the early 1980s. These graphite intersections were not assayed by CRAE, but their visual estimates ranged up to 20% graphite. Upon re-sampling the CRAE diamond holes held in the State's Whyalla core library, graphite assay intercepts were confirmed, and so they were replotted on Lincoln Minerals' newly interpreted geological sections. Due to present company resources focussing on the Kookaburra Gully graphite district, the Cockabidnie-Campoona Syncline graphite project is idle, but in due course will also undergo intensive exploration to prove up graphite resources in the region. During the NEPP 2014-2015 reporting year, the only field work undertaken was on EL 5170, where Centrex Metals conducted 8731.1m of resource definition drilling on the South Camel Hill iron ore occurrence (now called the Kimba Gap Iron Project) which straddles ELs 5170 and 4732. This was followed by orebody geological modelling and ore grade estimation commissioned from independent company “OreWin”, which produced a maiden Inferred Mineral Resource estimate of 487 Mt that was announced to the stock market on 29/7/2014. A combined RC and diamond drilling program of 39 inclined holes was completed between February and June 2014, for a total 5565.3 m of RC penetration plus 250.5 m of HQ and 2915.3 m of NQ2 coring. 1561 downhole samples were submitted for assaying and DTR testing, and another 89 surface rock chip samples were also sent for DTR testing. The resource definition drilling has now conclusively demonstrated that all of the Middleback Subgroup lithologies have been tectonically repeated at the South Camel Hill prospect. A newly recognised major thrust fault, lying between the orebody's eastern and western slabs and orientated almost parallel to their bedding, is outlined by thick intervals of "Tectonic Chert". This rock is interpreted as a melt product emplaced on the fault plane during the waning stages of the Kimban Orogeny. Its banding was produced by fault movement(s) which occurred as it solidified. Thin splays of Tectonic Chert also occur within both slabs, apparently following pre-existing lesser shear zones. A small subcrop of Tectonic Chert exposed ~100 m south-east of the outcropping eastern slab suggests that another major thrust fault exists beneath the eastern slab. A few quartz veins and pods that are large enough to be mappable may be coeval with the Tectonic Chert. During the NEPP 2015-2016 reporting year: • Four project exploration licences were fully relinquished, namely, EL 5245 Ironstone Hut, EL 5335 Ironstone Hill, EL 4571 Gilles Downs and EL 4883 Cockabidnie; • A Mineral Claim (MC 4378) was applied for over the Kimba Gap Iron Ore Project area; • A Retention Lease Application was submitted over a portion of the Kimba Gap Mineral Claim (the South Camel Hill magnetite deposit); • Approximately 300 kg of drill core from EL 5170 was dispatched to JV partner Baogang in China for it to conduct metallurgical test work on the cored orebody rocks; and • Rehabilitation of water bores was undertaken at EL 4884 Minbrie. No field work was undertaken on any of the project tenements by either Centrex Metals or Lincoln Minerals during this period. During the NEPP 2016-2017 reporting year: • On 15/12/2016, applications were submitted by the JV partners to DSD for permission to fully surrender EL 5617 Stony Hill and EL 5170 Kimba Gap, leaving just one exploration licence, EL 5851 Minbrie, active within the project; and • On 8/11/2016, a Retention Lease (RL 129) was granted over the South Camel Hill magnetite deposit, covering a 2547 ha portion of MC 4387. No field work was undertaken on any of the project tenements by either Centrex Metals or Lincoln Minerals during this period. The subject data release was requested by the JV partners in the letter prepared on 20/1/2017, marking their final submission for EL 5170. Surrender of that licence was approved by the Minister of Mines and Energy on 9/2/2017. In the reporting period to 13th August 2017 for EL 5851, the tenement was transferred from Centrex Metals to Boagang Group Investment (Australia) Pty Ltd on 19th May 2017. Baogang Group is reviewing the project with the aim of bringing the inferred resource to an indicated resource and the pre-feasibility study to a definitive feasibility study. No field work was completed by any of the companies within the reporting period. During the reporting period to 13th August 2018, no fieldwork was undertaken by the Baogang Group or Lincoln Minerals. As there was no new technical data generated, no annual report was submitted.

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About this record

Record No mesac27228
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Ecological Horizons Pty Ltd
Sponsor Centrex Metals Ltd
Tenement
Tenement Holder Lincoln Minerals Limited;Centrex Metals Ltd;Baotou Iron and Steel Group Co.;Baogang Group Investment (Australia) Pty Ltd;South Australian Iron Ore Group Pty Ltd
Operator Centrex Metals Ltd;Lincoln Minerals Limited
Geological Province
Mine Name South Camel Hill magnetite deposit
Stratigraphy
Commodity
Notes
Notes: On 27/6/2013, a Dual Tenancy Agreement was signed with Onesteel Manufacturing Pty Ltd (trading as Arrium) for a portion of their EL 4732 adjacent to Centrex Metals’ EL 5170. The Agreement covers a ~600 m extension of the Kimba Gap iron ore...

Notes: On 27/6/2013, a Dual Tenancy Agreement was signed with Onesteel Manufacturing Pty Ltd (trading as Arrium) for a portion of their EL 4732 adjacent to Centrex Metals’ EL 5170. The Agreement covers a ~600 m extension of the Kimba Gap iron ore deposit from EL 5170 into a Designated Area of EL 4752. On 19/12/2013, Centrex Metals notified Arrium of its intent to explore this Designated Area, thus triggering the 18 months long Initial Period of Exploration specified in the Agreement. Geographic Locality: Western Middleback Range;Stony Hill;Iron Knight;Iron Baron;Minbrie Hills;Cockabidnie Corner;Campoona Syncline Doc No: Env 11449 Drillhole: CRAE 79CW4;(015089);CRAE DDH SC1;(015090);CRAE DDH SC2a;(015091);CRAE DDH SC3 - DDH SC6;(015092);BURC092;KI001 - KI004;(283600 - 283603);KI006 - KI014;(306508 - 306516);KI016 - KI018;(306517 - 306519);KI020;(306520);KI021;(306521);KI023;(306522);KI027 - KI029;(306523 - 306525);KI031 - KI036;(306526 - 306531);KI038;(306532);KI040;(306533);KI046;(306534);KI049;(306535);KI052;(306536);KI055;(306537);KI056;(306538);KI062;(306539)

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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/mesac27228
Citation Farrell, F.;Watts, A.;Robinson, P. 1918. The Northern Eyre Peninsula JV Project. Data release made in lieu of submitting a licence final report at the full surrender of EL 5170 Kimba Gap: Joint annual reports for the period 1/2/2013 to 9/2/2017. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac27228

Technical information

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