Data release - as updated [made at SA Director of Mines' discretion] : Cockburn. Annual reports for the period 24/6/2009 to 23/6/2014.
Created: 12 Nov 2024 Revised: 12 Nov 2024

An area centred approximately 70 km west of Broken Hill is being explored for possible economic buried Broken Hill type Pb-Ag-Zn mineralisation that may be hosted by metasediments of the Palaeoproterozoic Wilyama Supergroup, as well as for...

An area centred approximately 70 km west of Broken Hill is being explored for possible economic buried Broken Hill type Pb-Ag-Zn mineralisation that may be hosted by metasediments of the Palaeoproterozoic Wilyama Supergroup, as well as for possible Kalkaroo or Portia style copper-gold mineralisation that may have formed within igneous intrusions and adjacent older basement metasediments. Reports of bedrock Cu-Pb-Zn geochemical anomalies encountered by historic RAB drillholes attracted Minotaur to the area to conduct follow-up investigations. During the first licence year, exploration activities included: - a review of historical exploration activities; - the selection of geophysical targets; - a review of existing Noranda and Minotaur/Sumitomo VTEM data; and - the acquisition of ground EM surveys at the previously defined MIQ23 West, Old Lake Dismal and Cottage Tank prospects. No basement conductors were detected at Old Lake Dismal and Cottage Tank, so no further work at these prospects was recommended. A basement conductor was detected at MIQ23 West, but apparently has poor conductivity thickness, and therefore was not recommended for drilling. During the second licence year, another VTEM anomaly defined from Minotaur's 2009 work on its prior EL 3596 (cf. Env 9872) was identified as requiring investigation, when a plot of the location of MiV008 over the regional TMI image revealed that the anomaly is located in a structurally interesting position. It is associated with a moderate strength EW trending magnetic feature juxtaposed to a continuation of the de-magnetised MiQ23 anomaly trend/shear zone. Ground geophysical surveying of this VTEM anomaly was planned by Minotaur to determine if it represents a valid conductor within the basement geology, possibly worthy of drill testing. A ground magnetic survey consisting of 21 x 1.5 km length lines was proposed to cover the MiV008 anomaly and better resolve the magnetic stratigraphy below shallow cover. This would be followed by the reading of three 1 km long lines of moving loop ground EM survey. During the third licence year, Minotaur acquired 7 x 1 km lines of moving loop ground EM over two separate VTEM anomalies, viz. MiV008 and MiV012, to test if these anomalies had arisen from valid basement conductors. No basement conductors were detected at MiV008, and a large, shallowly dipping conductor with poor conductivity was detected a depth of 90 m at MiV012. It was recommended that, despite the poor quality of the conductor, drill testing of the MiV012 anomaly be performed due to its relationship with a significant magnetic anomaly. During the fourth licence year, no on ground field work was completed on the tenement. Previous exploration in the area revealed geochemically anomalous basement coincident with low magnetic intensity areas. An exploration rationale of exploring for base metal mineralisation within stratigraphy in low magnetic intensity zones adjacent to subtle gravity features is proposed for the tenement. Low intensity magnetic zones in this region are interpreted to represent in-folded or sub-basins of Upper Thackaringa and Broken Hill Group stratigraphy, both of which are prospective for Cu-Au and Broken Hill-style Pb-Zn-Ag mineralisation. A detailed gravity survey of 670 stations with station spacing comparable to BHEI station spacing of 250m x 500m is proposed to delineate gravity anomalies within low magnetic intensity zones within the tenement. If gravity anomalies are detected these will be followed up with IP surveying in selected target areas. The current gravity station spacing on EL4270 Woodville Dam is generally 1km x 2km with several 1km x 1km stations in the northern part of the tenement. During the fifth licence year, work was restricted to office-based studies. Historical Airborne EM data compilation was undertaken, utilising VTEM data collected by Noranda from 2003 to 2006 on adjoining tenements. Further effort was put into the compilation of historical exploration data for the area.

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About this record

Record No mesac26651
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Geotech Airborne Ltd
Sponsor Minotaur Exploration Ltd
Tenement EL 4270
Tenement Holder Minotaur Operations Pty Ltd;Sumitomo Metal Mining Oceania Pty Ltd
Operator Minotaur Exploration Ltd
Geological Province Curnamona Province
Mine Name MIQ23 West prospect;Old Lake Dismal prospect;Cottage Tank prospect
Stratigraphy
Commodity granite
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 DSD in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88 of...

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 DSD in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88 of the Mining Regulations 2011. In June 2005, a Letter of Intent was signed by Minotaur with the Japan Oil, Gas and Metals National Corp. (JOGMEC) to explore a wide area near Broken Hill for zinc-lead-silver mineralisation. Under the terms of the “Border Joint Venture” agreement, JOGMEC had the right to earn 51% equity in Minotaur’s 100% owned tenements, Mutooroo (EL 2913), Mingary (EL 2820), Thackaringa (EL 5491) and Cockburn (EL 6124), by sole funding A$2 million of exploration expenditure over a three-year period. On 22/5/2007, Sumitomo Metal Mining Co. was selected by JOGMEC to assume its' position and interest under the Border Joint Venture with Minotaur. Geographic Locality: Mingary;Cockburn;Mundi Mundi Plain;Pine Creek;Old Lake Dismal Homestead;Woodville Dam;2009 Mingary 'B' Area Aerial EM (VTEM) Survey Doc No: Env 11967

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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/mesac26651
Citation Burtt, A.C.;Thompson, A.;Sen, A. Data release - as updated [made at SA Director of Mines' discretion] : Cockburn. Annual reports for the period 24/6/2009 to 23/6/2014. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac26651

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[140.5,-32.5],[141,-32.5],[141,-31.5],[140.5,-31.5],[140.5,-32.5]]]}
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