Two maps have been updated for RET to include in a Ministerial Breifing on the Northern Territory conferral to NOPSEMA for regulation of offshore petroleum activities in their designated coastal waters. The updates reflect the amended OPGGS Act definition of designated coastal waters. These maps relate to Geocat 81958. Not for public release. RET internal use only.

A collaborative field trial of the Quester-Tangent View Series 5 single beam acoustic benthic mapping system was recently conducted in Wallis Lake by Geoscience Australia and Quester Tangent Corporation. The survey involved acquisition of the acoustic backscatter data from the northern channels and basins of Wallis Lake. Quester-Tangent software (IMPACT v3) was used to classify acoustic echograms that returned from the lake bottom into statistically different acoustic classes, using principal components analysis. Six acoustically different substrate types were identified in the Wallis Lake survey area. Ground-truthing was undertaken to identify the sedimentological and biological features of the lake floor that influenced the shape of the return echograms. For each sample, measurements were made of grain size, wet bulk density, total organic carbon, CaCO3 content, and mass of coarse fraction (mainly shell) material. Statistical cluster analysis and multi-dimensional scaling were utilised to identify any physical similarities between groups of ground-truthing sites. The analysis revealed four distinct and mappable substrate types in the study area. The degree of association between acoustic classes and measured sediment parameters was also quantified. Cluster and MDS analysis revealed that, based on the parameters measured, the six acoustic classes were not uniquely linked to the sediment groups, suggesting that factors other than the sediment parameters alone are influencing the acoustic signal. The spatial interpretation of the Wallis Lake Quester-Tangent data represents the first quantification of non-seagrass habitats in the deeper areas of the lake, and provides a useful indicatior of benthic habitat diversity and abundance. For future studies, a more quantitative measure of faunal burrow size and density, and also other sedimentary bedforms, is recommended.

Printed Orthophoto map.

This dataset shows the extent of a wild river area as defined under a wild river declaration for the Wild Rivers Act 2005

These datasets represent locations of onshore seismic surveys and data collection points on the Australian continent. Four datasets make up this set : A dataset showing onshore deep seismic traverses since 1974. Selected scanned seismic sections (GIF format) from most of the seismic surveys are also available. A dataset showing locations of onshore refraction shot points. A dataset showing locations of seismic recording stations. A dataset showing where has completed deep seismic soundings in Australia. These datasets are generated from a database containing coordinates of all seismic traverses.

No abstract available

The CSA mine area 1:10,000 regolith-landform map illustrates the distribution of regolith materials and the landforms on which they occur, described using the RTMAP scheme developed by Geoscience Australia

The Pine Creek 1;10,000 regolith-landform map illustrates the distribution of regolith materials and the landforms on which they occur, described using the RTMAP scheme developed by Geoscience Australia

Development of coal mines and coal seam gas (CSG) resources can significantly impact groundwater systems, hydrogeological processes and the surface environment. Consequently, a sound understanding of basin-scale hydrogeology Is critical to developing effective water management strategies. The Australian Government Department of Sustainability, Environment, Water, Population and Communities recently funded investigation of the potential impacts of the development of coal mining and CSG production in several Australian coal basins. The Laura Basin was investigated as part of this program due to the significant environmental and cultural heritage values of the region which include several National Parks and the Great Barrier Reef Marine Park. The Laura Basin is a geological basin on Cape York Peninsula, QLD. There has been relatively limited development of the groundwater resources of the basin to date, which predominantly occur in Mesozoic sandstone units, the Dalrymple Sandstone and the Gilbert River Formation, which are contiguous with the Great Artesian Basin rocks of the Carpentaria Basin.

The Racecourse Creek 1:10,000 regolith-landform map illustrates the distribution of regolith materials and the landforms on which they occur, described using the RTMAP scheme developed by Geoscience Australia