Data release [made at SA Director of Mines' discretion] : Tumby Bay. Annual reports [to the 24/11/2006 commencement of the Eyre Peninsula Project licences' combined reporting status] for the period 18/1/2002 to 17/1/2007.
Published: 05 Mar 1907 Created: 12 Nov 2024 Revised: 12 Nov 2024

Exploration Licence 2887 Tumby Bay was taken out to cover prospective magnetite rich Banded Iron Formations (BIF) close to the eastern coast of the Eyre Peninsula. Potential was seen for a magnetite concentrate export operation taking advantage of...

Exploration Licence 2887 Tumby Bay was taken out to cover prospective magnetite rich Banded Iron Formations (BIF) close to the eastern coast of the Eyre Peninsula. Potential was seen for a magnetite concentrate export operation taking advantage of simple metallurgy and good infrastructure. Target magnetite deposits form part of an extensive early Proterozoic BIF sequence belonging to the Middleback subgroup of the Hutchison Group. These rocks have been strongly deformed and subjected to high grade metamorphism. This has produced coarse grained magnetite deposits with high iron and low impurities and often reconcentrated into fold hinge positions. Exploration during the first reporting period to 17th January 2003 has included: • 1997-line km of low-level high resolution aeromagnetic data over 6 survey areas. (Carrow, Koppio, Brennand, Kapperna, Oolanta and Iron Mount) to define drilling targets. • Several test lines of high-resolution ground magnetics to compare with key airborne data at Carrow (1.6-line km) and Koppio (18-line km). • A total of 8 diamond holes (plus 3 abandoned) and 11 RC holes for total of 3448 m of drilling at Carrow, Koppio and Iron Mount. • A total of 318 Davis Tube determinations and XRF concentrate analyses. • A total of 1007 ICP Fusion OES iron ore suite assays. • A total of 699 ARM2 Base Metal / Gold suite assays. Results confirmed the following: • There is potential for a modest iron ore resource at Carrow of between 70 and 90 million tonnes at a bulk grade of 30.8% DTR, 67.67 with better than 67.7% Fe and low impurities. • There is potential for a small resource at Koppio at a bulk grade of 31.37% DTR with 66.94% Fe and 6.19% SiO2, • There is potential for a small resource of very fine-grained magnetite at Iron Mount with a bulk grade of 37.16% DTR, 63.52% Fe and 7.44% SiO2. • No significant base metal or gold results were returned. • A conceptual study indicated that a 3 Mtpa concentrate operation based on a deposit like Carrow could be economic. Mining and power were key costs. Subsequent drilling at Carrow has shown that waste: ore ratio is likely to be significantly higher than the 1: 1 used in the study and that the estimated mining costs would be significantly higher. For the second year of reporting see ENV09473 CNO: 2036115. During Year 3 of reporting, limited fieldwork was carried out by the licensees. Ongoing discussions, meeting and fieldtrip to the area have been undertaken to demonstrate the potential of the Eyre Peninsula region to iron ore investors. detailed study has commenced into the establishment of an iron ore export business of both hematite ore and magnetite concentrates; a processing plant costing about $130m would be required, with export via Whyalla or a new wharf near Cowell. During this reporting period there was a field visit by Peninsula Minerals Matt Wood who collected samples from abandoned tailing dumps. A total of 15 samples were collected from the Lincoln Mine from across 9 abandoned mine workings. Copper results for these samples ranged in value from 0.03% to 30.37% with seven of the mine workings having value greater than 2% copper. Gold results for these samples ranged in value from 0.01 g/t to 2.4g/t Au and silver from less than 1g/t Ag to 35.1 g/t Ag. This result was not enough to do any further field work on their behalf. Peninsula Minerals are no long JV over this tenement, a new agreement is being processed now. No annual report was received for the fourth year of the tenement. During licence Year 6, EL 2887 became a part of the Amalgamated Expenditure Agreement for the Eyre Peninsula Project made between Centrex Metals and Lincoln Minerals. An amalgamated annual report for this period was reported separately [see ENV11450 CNO:2036366]. During the period, 3 RC slimline holes (K06SRC01-03) were drilled for 151 m, 21 drill chip samples were assayed with a single 1 m interval recording weakly anomalous gold, bismuth, tellurium, cobalt and copper.

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About this record

Record No mesac25953
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor UTS Geophysics Pty Ltd;G-tek Australia Pty Ltd;Haines Surveys Pty Ltd;ProMet Engineers Pty Ltd;Greenfields Geophysics Pty Ltd;Earth Bytes Pty Ltd
Sponsor South Australian Iron Ore Group Pty Ltd
Tenement EL 2887
Tenement Holder South Australian Iron Ore Group Pty Ltd;Centrex Metals Ltd;Kanowna Lights Ltd;Peninsula Minerals Ltd
Operator Portman Ltd;Centrex Metals Ltd
Geological Province
Mine Name Carrow prospect;Iron Mount prospect;Koppio prospect;Brennand prospect;Kapperna prospect;Oolanta 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 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. Ownership of South Australian Iron Ore Group, a wholly owned subsidiary of Portman, was transferred by that company to Centrex Metals on 15/12/2003. Centrex signed a joint venture agreement with Peninsula Minerals on 10/12/2003. Includes: - ProMet Engineers Pty Ltd, 12/7/2002. Conceptual [plant design for a] magnetite concentrator [to produce] 3 Mtpa concentrate for export (industrial design consultants' report for SAIOG). Appendix 9 of EL 2887 first annual report to 17/1/2003. 52 pages, figures, plates, tables; - Smith, R.J., 16/10/2002. Memo re. magnetic interpretation of the Carrow prospect (Greenfields Geophysics consultant's report for SAIOG). Appendix 10 of EL 2887 first annual report to 17/1/2003. 8 pages, figures; - Rajagopalan, S., 10/10/2002. Report on modelling of magnetic anomalies from Carrow, South Australia (Earth Bytes geophysical consultant's report for SAIOG). Appendix 11 of EL 2887 first annual report to 17/1/2003. 15 pages, 13 fig, 2 tables. Geographic Locality: South-eastern Eyre Peninsula;Tumby Bay;Port Neill;Koppio Synform;2002 SAIOG Port Lincoln Projects Aerial Magnetic Survey [part];2002 SAIOG Port Lincoln Projects Aerial Radioactivity Survey [part];2002 SAIOG Port Lincoln Projects Aerial DEM Survey [part];2002 SAIOG Arunta Aerial Magnetic Survey;2002 SAIOG Arunta Aerial Radioactivity Survey;2002 SAIOG Arunta Aerial DEM Survey;2002 Port Neill Gravity Survey Doc No: Env 09896 Drillhole: CADD001 - CADD008;(313770);(313771);(353903 - 353908);CARC009 - CARC019;(353909 - 353919);IRDD001;(353923);KODD001 - KODD003;(353924);(353925);K06SRC01 - K06SRC03;(215299 - 215302) Drillhole Unit No: 6029 01373;THROUGH;6029 01375

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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/mesac25953
Citation Fielding, D.C.;Parker, A.J.;Terrill, J.;Cattach, M.;Pearce, T.;Robinson, P. 1907. Data release [made at SA Director of Mines' discretion] : Tumby Bay. Annual reports [to the 24/11/2006 commencement of the Eyre Peninsula Project licences' combined reporting status] for the period 18/1/2002 to 17/1/2007. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac25953

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[135.5,-34.5],[136.5,-34.5],[136.5,-34],[135.5,-34],[135.5,-34.5]]]}
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