1 map showing the Acreage Release Title W15-2 in the area of Overlapping Jurisdiction in the Perth Treaty. Requested by RET August 2014. LOSAMBA register 707

The first edition ACE - Australian Continental Elements dataset is a GIS representation of the lithosphere fabrics of the Australian plate, interpreted from linear features and associated discontinuities in the gravity anomaly map of continental Australia (Bacchin et al., 2008; Nakamura et al., 2011) and the global marine gravity dataset compiled from satellite altimetry (Sandwell & Smith, 2009). It should be used in context with these input data sources, at scales no more detailed than the nominal scale of 1:5 000 000.

Australia is bounded on three sides by passive continental margins, a legacy of Gondwana breakup as first India and then Zealandia, followed by Antarctica, separated from Australia during the Late Jurassic-Early Cretaceous through to earliest Oligocene. As with most other rifted continental margins, breakup along each of these three margins occurred episodically, controlled by a number of factors including mantle rheology, pre-existing lithospheric and basement structure, and the direction of crustal extension prevailing at any one time during successive stages of continental rifting. Resulting post-rift passive margin geometries are consequently highly segmented and characterised by abrupt changes in orientation along strike that commonly coincide with pre-existing basement structures or crustal-scale heterogeneities across which there is a commensurate change in offshore basin architecture and normal fault patterns. Mapping of these heterogeneities in geological and geophysical datasets combined with a growing realisation that many of these basement features extend all the way to the ocean-continent boundary has focussed attention on the extent to which these same crustal structures may also have influenced the distribution and pattern of ocean floor fracture zone development. A prominent re-entrant along Australia's 4000-km long southern rifted margin marks the site of an early Paleozoic crustal-scale basement structure whose N-S orientation was optimal for reactivation during a switch in the direction of extension from NW-SE to N-S during the closing stages of continental rifting from about 55-47 Ma onward. This structure evolved from a continental transform boundary into the Tasman Fracture Zone with consequent development of a sheared continental margin along the western margin of the South Tasman Rise analogous to that formed off the Ghanaian coast during the separation of Africa from South America. As with its West African counterpart, seismic reflection profiles point to a strong strike-slip influence on basin geometry with en echelon development of elongate, narrow depocentres bounded by discontinuous steep to subvertical faults. Equally spectacular pull-apart basins associated with the 1500km-long Wallaby-Zenith Fracture Zone off Western Australia are similarly developed in thinned continental crust but, unlike the basins associated with the South Tasman Rise, they have been better seismically imaged and contain a substantially greater thickness of sediment (up to 5 seconds TWT). Interpreted seismic sections across the Zeewyck Sub-basin beneath the Valanginian breakup unconformity show a complex network of deep sedimentary basins bounded by steep faults and blocks of elevated older basement (positive flower structures) across which there is only limited lateral continuity in stratigraphy. Sedimentary sequences immediately above the breakup unconformity thicken into the basin axis and exhibit wedge-like geometries consistent with detritus shed from the adjacent basement highs as the sheared continental margin evolved and the associated spreading axis migrated oceanward. A period of basin-wide folding and faulting accompanied by uplift and erosion brought this phase of basin formation to a close and possibly occurred in response to transpression immediately prior to the onset of full drift. Fabrics in the adjacent N-S striking Pinjarra Orogen and related Darling Fault played an important role in localising extensional strain during formation of the Zeewyck Sub-basin and greater Perth Basin.

A general lack of exploration success in the offshore northern Perth Basin sheared margin has lead to a perception that the primary source rock onshore (Triassic Kockatea Shale Hovea Member) is absent or has limited generative potential. However, recent offshore well studies show the unit is present and oil prone. Multiple palaeo-oil columns were identified within Permian reservoirs below the Kockatea Shale seal. This prompted a trap integrity study into fault reactivation as a critical risk for hydrocarbon preservation. Breach of accumulations could be attributed to JurassicEarly Cretaceous extension, Valanginian breakup, margin tilt or localised Miocene inversion. This study focused on four prospects, covered by 3D seismic data, containing breached and preserved oil columns. 3D geomechanical modelling simulated the response of trap-bounding faults and fluid flow to Jurassic-Early Cretaceous NW-SE extension. Calibration of modelling results against fluid inclusion data, as well as current and palaeo-oil columns, demonstrates that along-fault fluid flow correlates with areas of high shear and volumetric strains. Localisation of deformation leads to both an increase in structural permeability promoting fluid flow, and the development of hard-linkages between reactivated Permian reservoir faults and Jurassic faults producing top seal bypass. The main structural factors controlling the distribution of permeable fault segments are: (i) failure of faults striking 350??110?N; (ii) fault plane intersections generating high shear deformation and dilation; and (iii) preferential reactivation of larger faults shielding neighbouring structures. These results point to a regional predictive approach for assessing trap integrity in the offshore northern Perth Basin. While this approach will help explorers reduce risk the study highlights the need to identify other play types that avoid fault seal breach. An as yet untested potential basin floor fan stratigraphic play in the Abrolhos Sub-basin and analogues to the successful Cretaceous stratigraphic traps along the West African sheared margin in the Zeewyck Sub-basin may satisfy these criteria.

Series of information sheets designed to provide landholders and local community with information regarding the activities being underatken as part of the Southern Thomson pre-competitive geoscience project, run in collaboration with the Queensland and New South Wales State Geological Surveys.

AAM was engaged by DPIPWE to acquire LiDAR data over several coastal areas of Tasmania during March and April 2014. Lady Barron comprises approximately 7.42 km²

This suite of products contains topographical relief generated from raw LiDAR data and covers the Southern extent of the Murray Darling Basin within the proximity of the Murray River. LiDAR (Light Detection and Ranging) is an airborne remote sensing technique for rapid collection of terrain data. The sensor used for this LiDAR project collected XYZ and Intensity data for 2 returns, first and last (ground) return by bouncing a pulse from the aircraft to the surface that enables the height and intensity values to be calculated. Height data within the first and last return raw LiDAR data was processed into 1m pixel DEMs. The intensity data with the first return raw LiDAR data was processed into a 1m pixel intensity image. The 1m cell size products, due to their large file sizes, are stored as 2km by 2km tiles to help facilitate data management and processing. The complete study area, covering 1.7million hectares, contains 5,288 of these tiles. All the above derived products were initially created as value added products by the Land Information Group (LIG), of the Department of Sustainability and Environment (DSE), Victoria. This acquisition was commissioned by Murray Darling Basin Commission (MDBC) and participating Consortium members including: Barmah Millewa Forum Murray Irrigation Limited, NSW Department of Infrastructure, Planning and Natural Resources - Deniliquin North Central Catchment Management Authority (CMA) Department of Urban Affairs and Planning, NSW Goulburn Broken CMA, Vic North East CMA, Vic

This USB has been produced for promotional puposes and will be handed out (free) at domestic and international conferences. The USB contains a selection of reports, flyers, maps and data. Products are grouped into 4 categories: Records and Brochures, Mineral Deposits, Geophysical Data and Surface Geology.

The Leeuwin Current has significant ecological impact on the coastal and marine ecosystem of south-western Australia. This study investigated the spatial and temporal dynamics of the Leeuwin Current using monthly MODIS SST dataset between July 2002 and December 2012. Topographic Position Index layers were derived from the SST data for the mapping of the spatial structure of the Leeuwin Current. The semi-automatic classification process involves segmentation, 'seeds' growing and manual editing. The mapping results enabled us to quantitatively examine the current's spatial and temporal dynamics in structure, strength, cross-shelf movement and chlorophyll a characteristic. It was found that the Leeuwin Current exhibits complex spatial structure, with a number of meanders, offshoots and eddies developed from the current core along its flowing path. The Leeuwin Current has a clear seasonal cycle. During austral winter, the current locates closer to the coast (near shelf break), becomes stronger in strength and has higher chlorophyll a concentrations. While, during austral summer, the current moves offshore, reduces its strength and chlorophyll a concentrations. The Leeuwin Current also has notable inter-annual variation due to ENSO events. In El Niño years the current is likely to reduce strength, move further inshore and increase its chlorophyll a concentrations. The opposite occurs during the La Niña years. In addition, this study also demonstrated that the Leeuwin Current has a significantly positive influence over the regional nutrient characteristics during the winter and autumn seasons.

Geoscience Australia (GA) is a leading promoter of airborne electromagnetic (AEM) surveying for regional mapping of cover thickness, under-cover basement geology and sedimentary basin architecture. Geoscience Australia flew three regional AEM surveys during the 2006-2011 Onshore Energy Security Program (OESP): Paterson (Western Australia, 2007-08); Pine Creek-Kombolgie (Northern Territory, 2009); and Frome (South Australia, 2010). Results from these surveys have produced a new understanding of the architecture of critical mineral system elements and mineral prospectivity (for a wide range of commodities) of these regions in the regolith, sedimentary basins and buried basement terrains. The OESP AEM survey data were processed using the National Computational Infrastructure (NCI) at the Australian National University to produce GIS-ready interpretation products and GOCADTM objects. The AEM data link scattered stratigraphic boreholes and seismic lines and allow the extrapolation of these 1D and 2D objects into 3D, often to explorable depths (~ 500 m). These data sets can then be combined with solid geology interpretations to allow researchers in government, industry and academia to build more reliable 3D models of basement geology, unconformities, the depth of weathering, structures, sedimentary facies changes and basin architecture across a wide area. The AEM data can also be used to describe the depth of weathering on unconformity surfaces that affects the geophysical signatures of underlying rocks. A number of 3D models developed at GA interpret the under-cover geology of cratons and mobile zones, the unconformity surfaces between these and the overlying sedimentary basins, and the architecture of those basins. These models are constructed primarily from AEM data using stratigraphic borehole control and show how AEM data can be used to map the cross-over area between surface geological mapping, stratigraphic drilling and seismic reflection mapping. These models can be used by minerals explorers to more confidently explore in areas of shallow to moderate sedimentary basin cover by providing more accurate cover thickness and depth to target information. The impacts of the three OESP AEM surveys are now beginning to be recognised. The success of the Paterson AEM Survey has led to the Geological Survey of Western Australia announcing a series of OESP-style regional AEM surveys for the future, the first of which (the Capricorn Orogen AEM Survey) completed acquisition in January 2014. Several new discoveries have been attributed to the OESP AEM data sets including deposits at Yeneena (copper) and Beadell (copper-lead-zinc) in the Paterson region, Thunderball (uranium) in the Pine Creek region and Farina (copper) in the Frome region. New tenements for uranium, copper and gold have also been announced on the results of these surveys. Regional AEM is now being applied in a joint State and Commonwealth Government initiative between GA, the Geological Survey of Queensland and the Geological Survey of New South Wales to assess the geology and prospectivity of the Southern Thomson Orogen around Hungerford and Eulo. These data will be used to map the depth of the unconformity between the Thomson Orogen rocks and overlying sedimentary basins, interpret the nature of covered basement rocks and provide more reliable cover thickness and depth to target information for explorers in this frontier area.