Data release - as updated [made at SA Director of Mines' discretion] : Pernatty Lagoon. Annual reports for the period 27/6/2007 to 22/7/2018.
Published: 23 Aug 1918 Created: 12 Nov 2024 Revised: 12 Nov 2024

Continuing exploration for possible buried economic IOCG mineralisation on the western side of an area located between Lake Torrens and Pernatty Lagoon, under tenure of renewed EL 3854, was focussed on determining mineral systems geochemical...

Continuing exploration for possible buried economic IOCG mineralisation on the western side of an area located between Lake Torrens and Pernatty Lagoon, under tenure of renewed EL 3854, was focussed on determining mineral systems geochemical signatures associated with prospective altered basement rocks, major fault-related structures and gravity and/or magnetic high anomalies associate with the area's underlying 20 km x 5 km, >10 mGal regional gravity ridge. During the 2007-2008 licence year (Year 11), after renewal of tenure as EL 3854 covering the same 316 square km extent of ground as before, Red Metal performed sampling and assaying of the drill cores obtained from its 2007 drilling programme. No significant assay results were returned. During the 2008-2009 licence year, work comprised the logging of the aforesaid drill cores. It was decided to extend the vertical diamond cored hole PN-07-09 below 1083 m depth by doing additional diamond core drilling; this task was accomplished without incident during July 2009, when the hole was taken to a new TD of 1836.8 m. From 1083 to 1656 m, the hole extension intersected multiple zones of feldspar and quartz porphyryitic volcanic rocks separated by zones of moderately to well banded metasediments. Alteration in this interval is dominated by feldspar and silica, with breccia developed locally due to strong network veining of actinolite/chlorite. From 1656 m to the end of the hole extension, the sequence drilled is dominantly well-banded metasediments that are overprinted with strong to intense epidote alteration. Magnetite occurs as both local pervasive alteration with associated actinolite, and in veins with associated pyrite+-chalcopyrite+-epidote+-quartz+-actinolite+-calcite. Copper sulphide content is best developed in the interval between 1712 and 1810 m, where it averages between 0.5% and 1% chalcopyrite. Detailed drill core logging and sampling was begun. A downhole EM survey was planned for this hole to explore for any conductive targets which might lie adjacent to it. During the 2009-2010 licence year, the downhole Crone Pulse EM survey was run by a contractor in late August 2009, but it failed to detect any off-hole conductors. A review of the alteration present in existing drill cores was continued, and further core sampling for assay was done. During the 2010-2011 licence year, an audio frequency magneto-telluric test survey of 4 lines was conducted for the JV partners in late January 2011 by Zonge Engineering. 107 AMT soundings (ExHy and EyHx) were collected on three lines using a 200 m station spacing, to cover 11.5 line km in total. The results of the AMT survey provided stratigraphic information, but did not produce obvious drill targets. During the 2011-2012 licence year, no new work was done. Plans were made to put in a deep, 1300 m+ angled exploratory diamond drillhole into an untested magnetic target, P1 located in the north-east of the tenement, that was interpreted to lie at ~900 m true depth and which could have either a single or multiple source bodies. As of mid-2012, Red Metal had earned an 85% interest in the licence from Havilah Resources. During the 2012-2013 licence year, Red Metal generated a second copper-gold drill target, P2, which it also believed would hold major potential for making a mineral discovery, and began seeking third party funding to assist with the costs of its proposed drilling programme. From Red Metal's alteration mapping carried out at 600 m depth, using available drillhole and other indirect information, both the P1 and P2 magnetic and gravity targets were thought to lie within an unusual massive garnet skarn rock that is unique to this region and is interpreted as possible distal skarn alteration halo which is surrounding a large copper mineralised magnetite-siderite skarn lying at depth. The previous nearby holes SAR8, SAR9 and PN-07-09 had failed to be drilled deeply enough to test the source to the anomalies. The centre of the giant P2 anomaly lay near SAR9, and was modelled to start at a depth of about 1600 m. The company's economic modelling had suggested that deposits at this depth are potentially feasible if the grade and tonnage are high and the ore can be mined by bulk underground mining methods. During the 2013-2014 licence year, no new work was done. Red Metal continued to search for a joint venture partner. During the 2014-2015 and 2015-2016 licence years, Red Metal did no work, but sought to refine its geological model for the setting of its two deep drilling targets, by submitting local drillhole cores to DSD for hyperspectral Hylogger scanning to try to gain more detailed information about basement alteration. During 2016-2017 licence year, no field work was undertaken by Red Metal. Planning continued for proposed deep drilling with funding sought to assist with drilling the remaining magnetic targets including a deep gravity/magnetic data. Approximately 27% of the former area of EL 5107, consisting of four separate peripheral sub-blocks located on the southern, eastern and northern sides of the licence, was partially relinquished by the JV partners on 22/7/2017 due to its perceived diminished prospectivity for high grade buried basement-hosted IOCG mineralisation. During the 2017-2018 licence year no fieldwork was undertaken, with Red Metal undertaking drill program planning while seeking third party funding to assist the project. A farm-in Joint Venture was established between Red Metal and Oz Exploration Pty Ltd.

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About this record

Record No mesac27282
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Outer-Rim Exploration Services;Zonge Engineering and Research Organisation (ZERO)
Sponsor Red Metal Limited
Tenement
Tenement Holder Havilah Resources NL;Red Metal Limited
Operator Red Metal Limited
Geological Province
Mine Name Pi magnetic anomaly;P2 magnetic anomaly
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. Geographic Locality: Pernatty Lagoon;Pernatty Ridge Dunefield;2011 Pernatty AMT Test Survey Doc No: Env 09420 Drillhole: PN-07-09 (extension);(288241)

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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/mesac27282
Citation Kary, G.L.;Page, A.;Mann, S. 1918. Data release - as updated [made at SA Director of Mines' discretion] : Pernatty Lagoon. Annual reports for the period 27/6/2007 to 22/7/2018. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac27282

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[137,-32],[138,-32],[138,-31],[137,-31],[137,-32]]]}
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