Alberga River (part of the Lambina Project). First annual report plus final report to licence full surrender, for the period 1/8/2014 to 18/2/2016.
Created: 12 Nov 2024 Revised: 12 Nov 2024

A small licence area centred ~70 km east of Marla was taken up to explore for possible economic buried sedex style base metal deposits or IOCG style mineralisation which may exist there, hosted by largely unknown Proterozoic basement rocks,...

A small licence area centred ~70 km east of Marla was taken up to explore for possible economic buried sedex style base metal deposits or IOCG style mineralisation which may exist there, hosted by largely unknown Proterozoic basement rocks, including probable granitic plutons, which it was thought could have evolved in a complex cratonic margin setting which was subject to a long history of crustal attenuation and fault movements / hydrothermal system activity. During the initial licence year, the grant licensee Sandrib investigated a conductive structure which had previously been revealed in 2011 by a prematurely discontinued moving loop ground EM survey carried out by EL 3566/4761 licensee Raisama. Follow-up moving loop and fixed loop ground EM surveys were carried out over this geophysical feature by Sandrib in December 2014, that successfully identified a large, strongly conductive structure subcropping between 100 and 200 m below ground level, and persisting to at least 500 m below ground level, with a strike length of >1800 m and dipping at about 45° towards WSW. It was decided to test this anomaly with a small drilling program, in the hope that the conductive response in the ground was the result of the presence of sedex style sulphide mineralisation. During July 2015, the Macallum Group, operating under an earn-in option with Sandrib, drilled a total of 4 vertical or steeply inclined rotary mud precollared, HQ/NQ2 diamond cored holes for 926 m into the Lambina EM anomaly, at three sites spaced approximately 600 m apart along a NNW-SSE aligned traverse. Beneath a Cenozoic and Mesozoic sedimentary cover sequence, Proterozoic basement rocks consisting of black graphitic shales intercalated with other fine grained siliciclastic marine sediments were encountered in each of the four holes at depths ranging between 96 and 116 m, much shallower than prognosed, and the holes remained in these sediments until total depth. The structural orientation of the shales was inferred from bedding angles measured in abandoned drillhole LMD001 (TD 198.3 m) and the adjacent daughter hole (LMD001A, TD 305.1 m) that was wedged off it through casing at a higher level after the former began to track along bedding. The strike of the beds appeared to be approximately towards the NNW, and their dip is about 50°. These bedding angles, measured with an electronic survey instrument within the drillholes, closely match the dip of the modelled EM conductor. It was concluded that although three of the holes had passed through the interpreted position of the EM conductive structure, no mineralisation of economic significance had been encountered. The EM response was therefore ascribed to the conductive graphitic shales. During licence Year 2, prior to the tenement's surrender, no work was done.

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About this record

Record No mesac26697
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Southern Geoscience Consultants Pty Ltd
Sponsor Macallum Group Ltd
Tenement EL 5459
Tenement Holder Sandrib Pty Ltd;Macallum Group Ltd
Operator Macallum Group Ltd
Geological Province
Mine Name
Stratigraphy
Commodity
Notes
Geographic Locality: Alberga River;Lambina Station
Doc No: Env 12793
Drillhole: LMD001;LMD001a;LMD002;LMD003;(290955 - 290958)

Geographic Locality: Alberga River;Lambina Station Doc No: Env 12793 Drillhole: LMD001;LMD001a;LMD002;LMD003;(290955 - 290958)

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/mesac26697
Citation Culpan, N.;Jenke, G. Alberga River (part of the Lambina Project). First annual report plus final report to licence full surrender, for the period 1/8/2014 to 18/2/2016. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac26697

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[134,-27.5],[134.5,-27.5],[134.5,-26.5],[134,-26.5],[134,-27.5]]]}
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Lineage