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Data release [made at SA Director of Mines' discretion] : Murdie Island (part of the Stuart Shelf Project). Progress reports to licence expiry/renewal, for the period 23/3/1977 to 22/3/1979.
Created: 12 Nov 2024 Revised: 12 Nov 2024
Author: Lalor, J.H.;Smith, R.N.

Exploration undertaken by Western Mining Corp. in a search for possible economic Mount Gunson - type stratiform copper mineralisation that could have formed within a sequence of buried Adelaidean metasediments of the eastern Stuart Shelf which in...

Exploration undertaken by Western Mining Corp. in a search for possible economic Mount Gunson - type stratiform copper mineralisation that could have formed within a sequence of buried Adelaidean metasediments of the eastern Stuart Shelf which in part subcrop on EL 293, initially comprised ground geophysical surveys aimed at delineating some interpreted regional magnetic and gravity anomalies situated over central Lake Torrens near Murdie Island. 350 line km of ground magnetic and gravity traverses were acquired during February-May 1978, after commencement of the work had been delayed by the process of obtaining balloon-tyred, lightweight 3-wheeled motorcycles suitable for safely accessing the soft surface of the salt lake. Interpretation of the survey results indicated a depth to the magnetic anomaly source of 500-1000 m, and 1.8 km depth to the gravity anomaly source (using a density contrast of 0.3 g/cc). No further field work was programmed for EL 293 until the regional geology is better understood by WMC out of ongoing exploration occurring on its adjacent tenements.

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About this record

Record No mesac24671
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor
Sponsor
Tenement EL 293
Tenement Holder Western Mining Corp. Ltd
Operator Western Mining Corp. Ltd
Geological Province
Mine Name
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. Data from this tenement is part of the first official such release of historic information pertaining to a number of formerly confidential WMC Stuart Shelf licences.  WMC's first public announcement about the discovery of the giant Olympic Dam copper deposit was made at its AGM held on 18/11/1976. The orebody was found by diamond drillhole RD1 drilled on EL 190 during July 1975, with significant copper suphides (chalcocite) first recognised during a delayed inspection of that hole's retrieved drillcore during September 1975. The size of the discovery was confirmed by drillhole RD10 during early November 1976, when it encountered mineralisation grading an average 2.12% Cu over a 170 m thick cored interval within highly altered and iron-enriched pre-Adelaidean acid igneous basement rocks. After WMC had made this initial press release, the later-detected substantial uranium content of these same rocks cored by RD10 (averaging 0.58 kg/t U3O8 over 170 m) was announced in the company's next quarterly report, made public on 11/2/1977.   Ministerial consent was granted on 1/3/1977 to an agreement for amalgamated licence expenditure commitments on WMC's Stuart Shelf ELs 190, 231, 232, 233, 269, 279, 292, 293 and 294.  A continuation of tenure over the same area has now been granted to WMC as EL 488.
Geographic Locality: Central-western Lake Torrens;Murdie Island;Southern Andamooka Island;Carrapateena Hut;1976 Torrens Gravity Survey;1978 Murdie (sic) Gravity Survey
Doc No: Env 02969

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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/mesac24671
    Citation Lalor, J.H.;Smith, R.N. Data release [made at SA Director of Mines' discretion] : Murdie Island (part of the Stuart Shelf Project). Progress reports to licence expiry/renewal, for the period 23/3/1977 to 22/3/1979. Mineral Company Report - Mineral Exploration
    https://pid.sarig.sa.gov.au/document/mesac24671

    Technical information

    Status
    Maintenance and Update Frequency
    Geographic Reference GDA2020 (EPSG:7844)
    Geo bounding box {"type":"Polygon","coordinates":[[[137.5,-31.5],[138,-31.5],[138,-30.5],[137.5,-30.5],[137.5,-31.5]]]}
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