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Mineral Potential of Western Murray Basin

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Mineral Potential of Western Murray Basin Mineral potential of western Murray Basin Baohong Hou & Marc Twining November 2019 Where and What Western Murray Basin Improving recognition & prediction Section 15 Region NSW Q cover Murray Basin Berri Basin Nadda Basin Darling Basin SA VIC Basement to the w Murray Basin Section 15 Eg., Drexel et al., 1993; Drexel region and Preiss, 1995; Cowley, 2010; IUGS Geological Time Scale, 2015. Geology Late Silurian to Early ? Carboniferous ? Darling Basin A ? RENMARK TROUGH A Eg., Alley and Gravestock, 1995; http://www.ga.gov.au / ? ? Geology ? Early Permian RENMARK TROUGH Nadda Basin ? Late Carboniferous A to Triassic drillholes Eg., Alley, 1995 A ? ? Geology Jurassic to ? Cretaceous RENMARK TROUGH Berri Basin Section 15 Gazettal (2014/000363-2) A ? Eg., Thornton, 1974; Rogers, 1995; A ? Geology Section 15 Cainozoic Western Murray Basin hundreds Cainozoic drillholes; but Only a couple of dozen drillholes through the base. Geology Murray Basin W Murray Basin Eg., Rogers et al., 1995; Stratigraphy -Murray Basin Stratigraphy of the Murray Basin HMS HMS HMS HMS modified from Rogers et al., 1995; Brown and Stephenson, 1991; Hou et al., 2012. Eustatic changes are based on Haq et al. (1987) Evolution -Western Murray Basin Early Eocene - Oligocene (c.53-24 Ma) UPPER 141° E ? RENMARK 32°30´ S GROUP ? fluvial ? ? swamp lacustrine marginal marine 34°30´ S marine Buccleuch Fm 139° E Olney Fm/Warina Sand Olney Fm modified from Miranda Pre-Cainozoic et al., 2009; Fabris, 2002 Bedrock/Basement Evolution -Western Murray Basin Early - Middle Miocene - (c.33-13 Ma) 141° E 32°30´ S ? MURRAY ? GROUP Olney Fm marginal marine Geera Clay Winnambool Fm Mannum Limestone ? Sea Gambier Limestone 34°30´ S Murray Group limestones 139° E Ettrick Fm RENMARK GROUP modified from Miranda Pre-Cainozoic Bedrock/Basement et al., 2009; Fabris, 2002 Evolution -western Murray Basin Late Miocene - Early Pliocene (c.7-3 Ma) After ~5 Ma erosion/non deposition 141° E ? Loxton Sand 32°30´ S strandplain Olney Fm with ? lacustrine Loxton- strandlines HMS Parilla Sands HMS marginal estuarine Blanchetown marine Clay deltaic Winnambool Fm Geera Late Clay Neogene Mannum Limestone Sea Bookpurnong Fm 34°30´ S ? 139° E Murray Gr oup li mestones Gambier RENMARK GROUP Limestone Pre-Cainozoic Ettrick Fm modified from Miranda Bedrock/Basement et al., 2009; Fabris, 2002 Evolution -western Murray Basin ?Late Pliocene - Pleistocene (c.2.4-0.7 Ma) Mt Gambier coastal plain with strandlines 141° E 32°30´ S Blanchetown Clay Nullarbor Cliff ? HMS lacustrine Norwest Bungunnia ? Bend Fm Limestone Blanchetown ? HMS 34°30´ S HMS Clay 139° E Loxton-Parilla Sands Bookpurnong Fm MURRAY AND RENMARK GROUPS modified from Miranda et al., Pre-Cainozoic Bedrock/Basement 2009; Fabris, 2002 Strandlines -Murray Basin Loxton Sand strandplain with HM- HMS ? bearing strandlines HMS HMS? Mt Gambier coastal plain associated with HMS HMS Bridgewater Fm. strandplain HMS? HMS identification? after Ferris, 1999; Fargher, 2000. ? modified from Miranda et al., 2009 Strandlines –Murray Basin Loxton Sand strandlines in Lake Bungunnia Sedimentary evolution? Post-depositional event? modified from Miranda et al., 2009 Strandlines -HMS-bearing Four types of Aeolian HM ? Lake Bungunnia Transgressive HM ? NSW, VIC Regressive HM ? SA Lag HM ? NSW Littoral and HMS HMS regressive strandlines HMS play important HMS roles in the western HMS Murray Basin. Inferred components –Murray Basin HMS - Loxton Sand strandplain & Mount Gambier coastal plain Neogene Loxton Sand strandplain; major structural features (black dish lines) controlling the distribution of the Upper Norwest Bend Fm? paleodrainage channels (yellow lines & blue dish line)?; Pleistocene strandplain - Mount Gambier coastal plain; Kanawinka Escarpment (marking the southern edge of the uplifted zone); Padthaway High?. Potential in western Murray Basin -interpretation of HMS-bearing strandlines SRTM DEM NOAA-AVHRR ntt (1.1km pixel) ASTER nnt (90m pixel) DEM NOAA ntt ASTER ntt ? Landsat 7 ETM+ ntt (900m pixel) Identified strandlines DEM + satellite ntt images + geology + geophysics? Ntt imagery interpretation of strandlines ary estu in d la Sea level stan d p Palaeo-strandplain morphology High ran St Bedrock E Regressive beach and ros shoreface sand ion surf ace cover sand water table strandline sediments Cooling feature Theory: temperature variations resulting from moisture Palaeovalley morphology basin+channel regolith & sand covers sediments basin+channel fault zone sediments channel /lake fills channel fills BEDROCKS BEDROCKS BEDROCKS Prospectivity -MB -HM sources? after Ferris, 1999; Fargher, 2000. Keeling et al., 2015 Potential in w Murray Basin ? ? Silver City Mindarie deposits ? Murray ? Bridge ? Keeling et al., 2015 Potential in western Murray Basin Groundwater in W Murray Basin Four main regional aquifers separated by two confining layers: Quaternary Limestone (unconfined) aquifer (Coastal Section 15 Plain), Pliocene Sands (unconfined) aquifer, Bookpurnong Fm (confining layer), Murray Group Limestone (mostly unconfined) aquifer, Ettrick Formation (confining layer), Renmark Group (confined) aquifer. Barnett (2015) Potentials beneath W Murray Basin Energy resources? RENMARK TROUGH 2D / 3D? Murray Basin River System Evolution - Martin Köhler et al. Keep an eye on our webpage/Discovery Day as updated information becomes available DISCLAIMER The information contained in this presentation has been compiled by the Department for Energy and Mining (DEM) and originates from a variety of sources. Although all reasonable care has been taken in the preparation and compilation of the information, it has been provided in good faith for general information only and does not purport to be professional advice. No warranty, express or implied, is given as to the completeness, correctness, accuracy, reliability or currency of the materials. DEM and the Crown in the right of the State of South Australia does not accept responsibility for and will not be held liable to any recipient of the information for any loss or damage however caused (including negligence) which may be directly or indirectly suffered as a consequence of use of these materials. DEM reserves the right to update, amend or supplement the information from time to time at its discretion..
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