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Location: 340 km E from Newman, Western Australia, Australia
159 Stirling HighwayPO Box 1104, WA 6909NedlandsWestern Australia, Australia6009
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The Little Sandy Desert region, within which the LD Project is located, is underlain by the Savory Basin.The shallow sediments of the Savory and southwestern Yeneena Basins generally comprise gently eastdipping medium to coarse-grained sandstone and pebbly conglomerate. The underlying bedrock outcrops infrequently: more than 90% of the basin is covered by unconsolidated or semi-consolidated Cainozoic deposits, consisting largely of windblown sands in the form of dunes and sandplains (Williams, 1992). The sand is composed of medium to medium-coarse quartz grains, with occasional ferruginised grains or ironstone pebbles. The wide-spread longitudinal dunes that occur throughout the Savory Basin are thought to have formed during the intensely arid conditions that prevailed during the last glacial maximum. Colluvial deposits occur to a limited extent in the Basin and are mostly located adjacent to infrequent rocky outcrops. Alluvial deposits of unconsolidated silt, sand and gravel are also relatively uncommon and are restricted mostly to drainage lines and to the terminal Lake Disappointment playa. The superficial sequences are underlain at variable depth by members of the Neoproterozoic Tarcunyah Group, which comprises an interbedded sequence of sandstone, siltstone and shale deposited around 800 Ma. These bedrock materials outcrop locally to the east and the south-west of LD.The stratigraphy beneath and adjacent to LD reported in published literature has been generally confirmed by Reward’s explorations programs. Subsurface conditions beneath the playa comprise windblown silty or clayey sands, interspersed with – and underlain by – clayey / silty lake sediment (lacustrine) deposits, with occasional sandy lenses.