Mount Eba. Progress reports and final report to licence full surrender, for the period 10/1/1986 to 1/12/1989.
Published: 14 Dec 1989 Created: 13 Nov 2024 Revised: 13 Nov 2024

TARGET: Possible shallowly buried, igneous intrusive-related epithermal or hydrothermal gold and base metal deposits in the Lake Labyrinth - Earea Dam region, north and west of Kingoonya. EXPLORATION: Acquisition of aerial magnetic and...

TARGET: Possible shallowly buried, igneous intrusive-related epithermal or hydrothermal gold and base metal deposits in the Lake Labyrinth - Earea Dam region, north and west of Kingoonya. EXPLORATION: Acquisition of aerial magnetic and radiometric surveys, geophysical image processing and interpretation, prospect gridding, detailed gravity and magnetic surveys, geological mapping, rock chip sampling and trenching, and gold analysis of stored bedrock samples from previous CRA exploration in the South Lake tin mine area, plus the same for samples of stored drill core from Abadon Holdings drillhole 73DH1A (SML 680). Inclined diamond drilling (2 holes totalling 353.5 m) tested a 2.75 mGal gravity / 4000 nT magnetic anomaly at Lake Labyrinth West. RESULTS: Elevated neodymium values (max 206 ppm) were recorded from a layered complex of pegmatite - veined, carbonate/chlorite - altered, andesitic alkali basalt units cored in the second of the diamond holes (DD88ME2). As well as the volcanics, an underlying sequence of veined and potassic - altered peridotite and dolerite dykes was penetrated, which is believed to be volumetrically sufficient for causing the observed coincident geophysical anomaly at Lake Labyrinth West. Only trace sulphide mineralisation was observed in the drill core, and drill sample assays gave no significant base or precious metal values, although marked Cr, Co, Ni and Cu element depletion was evident in two sheared and strongly altered intervals of basalt found to be anomalous in Ba, Ce and La. Examination of the Mount Eba airborne geophysical survey data revealed no other significant anomalies requiring drill testing. Additional ground magnetic, gravity and Sirotem surveys carried out at the South Lake prospect metamorphosed Archaean BIF sequence gave no encouragement to the search for possible hydrothermal gold mineralisation or buried, shear-hosted massive base metal sulphides. Lastly, a reportedly Archaean metabasic rock unit at Hopeful Hill was geochemically sampled, but returned no assays of note.

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About this record

Record No mesac32339
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Geoterrex Pty Ltd;Solo Geophysics and Co.;Pontifex and Associates Pty Ltd
Sponsor CRA Exploration Pty Ltd
Tenement EL 1315
Tenement Holder CRA Exploration Pty Ltd
Operator
Geological Province Gawler Craton
Mine Name Lake Labyrinth West magnetic anomaly;Glenloth prospect;South Lake prospect;Kenella Rock prospect
Stratigraphy
Commodity
Notes
Notes: Includes:   - Geoterrex Pty Ltd, 3/10/1986. Logistics report for an airborne magnetic and radiometric survey of the Coober Pedy Ridge, Mount Eba, Wudinna and Balta Baltana areas (geophysical contractor's report for CRA Exploration Pty Ltd)....

Notes: Includes: - Geoterrex Pty Ltd, 3/10/1986. Logistics report for an airborne magnetic and radiometric survey of the Coober Pedy Ridge, Mount Eba, Wudinna and Balta Baltana areas (geophysical contractor's report for CRA Exploration Pty Ltd). Appx 1 of EL 1315 fourth quarterly report to 9/1/1987. fiche: 2-3,8; p: 46-122; 2 plans, 3 fig. See also the EL 1315 partial relinquishment report to 9/1/1989, held in Env 8155. Geographic Locality: Lake Labyrinth;Wilgena;Mount Eba;Gosse Range;Earea Dam;Wallabyng Range;Kingoonya;Ferguson;Bulpara Hill;Lake Harris;Hopeful Hill;1957 SADM Tarcoola - Kingoonya Aerial Magnetic Survey;1986 Mount Eba Aerial Magnetic Survey [part];1986 Mount Eba Aerial Radioactivity Survey [part] Doc No: Env 06532 Drillhole: DD87ME1;(9659);DD88ME2;(9569);Abadon Holdings 73DH1A Drillhole Unit No: 5936 00167;5936 00077

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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/mesac32339
Citation Sugden, S.P.;Johnston, W.H.;MacKee, G.L.;Palmer, D.C.;Pontifex, I.R. 1989. Mount Eba. Progress reports and final report to licence full surrender, for the period 10/1/1986 to 1/12/1989. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac32339

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[134.5,-31.5],[136,-31.5],[136,-30.5],[134.5,-30.5],[134.5,-31.5]]]}
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