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This preliminary report will provide a geochemical and ionic characterisation of groundwater, to determine baseline conditions and, if possible, to distinguish between different aquifers in the Laura basin. The groundwater quality data will be compared against the water quality guidelines for aquatic ecosystem protection, drinking water use, primary industries, use by industry, recreation and aesthetics, and cultural and spiritual values to assess the environmental values of groundwater and the treatment that may be required prior to reuse or discharge.
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Geoscience Australia carried out a marine survey on Carnarvon shelf (WA) in 2008 (SOL4769) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wavegenerated currents. Data and samples were acquired using the Australian Institute of Marine Science (AIMS) Research Vessel Solander. Bathymetric mapping, sampling and video transects were completed in three survey areas that extended seaward from Ningaloo Reef to the shelf edge, including: Mandu Creek (80 sq km); Point Cloates (281 sq km), and; Gnaraloo (321 sq km). Additional bathymetric mapping (but no sampling or video) was completed between Mandu creek and Point Cloates, covering 277 sq km and north of Mandu Creek, covering 79 sq km. Two oceanographic moorings were deployed in the Point Cloates survey area. The survey also mapped and sampled an area to the northeast of the Muiron Islands covering 52 sq km. cloates_3m is an ArcINFO grid of Point Cloates of Carnarvon Shelf survey area produced from the processed EM3002 bathymetry data using the CARIS HIPS and SIPS software
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Geoscience Australia carried out marine surveys in southeast Tasmania in 2008 and 2009 (GA0315) to map seabed bathymetry and characterise benthic environments through observation of habitats using underwater towed video. Data was acquired using the Tasmania Aquaculture and Fisheries Institute (TAFI) Research Vessel Challenger. Bathymetric mapping was undertaken in seven survey areas, including: Freycinet Pensinula (83 sq km, east coast and shelf); Tasman Peninsula (117 sq km, east coast and shelf); Port Arthur and adjacent open coast (17 sq km); The Friars (41 sq km, south of Bruny Island); lower Huon River estuary (39 sq km); D Entrecastreaux Channel (7 sq km, at Tinderbox north of Bruny Island), and; Maria Island (3 sq km, western side). Video characterisations of the seabed concentrated on areas of bedrock reef and adjacent seabed in all mapped areas, except for D Entrecastreaux Channel and Maria Island. fortescue_160 is an ArcINFO grid of the Tasman Peninsula survey area produced from the processed EM3002 bathymetry data using the CARIS HIPS and SIPS software.
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In this study, two hyperspectral instruments were used on sonic-cored drillhole materials to assess the value of hyperspectral methods for hydrogeological investigations: (1) the Hylogger core scanner; and (2) the Portable Infrared Mineral Analyser (PIMA). The hylogger provides continuous coverage down the logged sonic cores in the visible to near-infrared (VNIR), short wavelength infrared (SWIR), and thermal infrared (TIR) bands. The PIMA is used on individual samples, and was used to cross-check SWIR results from the Hylogger. Further validation of the methods was carried out using XRD analysis of selected samples. The hylogging method successfully mapped the distribution of clays and oxides in both the aquitards and aquifers. The Coonambidgal Formation shallow aquifer is dominated by montmorillonite, and the Menindee Formation and Blanchetown Clay aquitard by kaolinite with lesser montmorillonite. Clay mineralogy in the Calivil Formation was strongly controlled by sedimentary facies, with muddy units predominantly kaolinite, with lesser nontronite, and clays in sandy units either kaolinite-dominant or smectite-dominant. The two clay mineral associations were also found to correlate with different hydraulic conductivity trends in the Nuclear Magnetic Resonance logging of the aquifer. The underlying Renmark Group contained mixed kaolinite and smectite. Mapping of oxide species (and Munsell colours) was also informative in terms of mapping overprinting redox zones, with goethite found to be ubiquitous in all formations. Haematite was however, detected only locally in the Calivil Formation and Renmark Group. Overall, we conclude that hyperspectral logging of drillcore is a powerful tool for use in detailed hydrogeological investigations.
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22-1/E53-1/5 Vertical scale: 100
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75% coverage east I50/B1-90
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Geothermal energy is a renewable energy technology reported to have a large potential resource base. However, existing geothermal data for Australia (borehole temperatures and heat flow determinations), are limited and collection of additional data is both time consuming and restricted to accessing to wells drilled for other purposes. It is therefore important to develop "deposit" or resource models to aid exploration; improving the quality of subsurface thermal estimates, and helping to identify the distal footprints of geothermal systems. Conceptually, the fundamental requirements of a geothermal system are well understood. However, the complex interplay between the various elements makes it difficult to compare different geographical regions and to assess their relative prospectively. As such, the results of some 130,000 synthetic thermal-modelling runs have been used to calibrate a new tool called the 'Geothermal Calculator'. The Calculator acts as an emulator, or surrogate model, falling into a class of functions which seek to approximate the input / output behaviour of more-complex systems. This presentation will explore the mechanics of the Calculator, before examining some of its possible uses; from simple point-spot estimates to the broader continental scale. The functionality of the Geothermal Calculator presents a significant step forward in our ability to produce subsurface temperature estimates, and represents a notable milestone in the pathway to realising our subsurface geothermal energy potential.
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No abstract available
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22-2/I55-4/8-4 Vertical scale: 150
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10% coverage sth east 22/E54/56 Vertical scale: 1000