The Onshore Energy Security Program was funded by the Australian Government from 2006 to 2011 to reduce risk in energy exploration. The program was delivered by Geoscience Australia, in collaboration with state and territory geological surveys, the National Research Facility for Earth Sounding (ANSIR) and AuScope. During this program approximately 6,500 line kilometres of deep crustal seismic reflection data were acquired and processed. The seismic images provide an understanding of the crustal architecture of sedimentary basins and their tectonic relationship to older basement terrains. Deep crust and upper mantle structures were also imaged and the Moho boundary could often be interpreted. The 2D seismic reflection data were acquired using three vibroseis trucks, with three 12 s variable frequency sweeps at each vibration point, usually with frequencies from 6 to 96 Hz. Correlated 20 s data were recorded, imaging to approximately 60 km depth. 300 geophone groups at 40 m intervals and 80 m source intervals provided 75 fold data. Data processing included imaging shallow sedimentary basins and also complex, deep, steeply dipping crystalline rock structures with high stacking velocities and out of plane energy. The seismic data, complemented by other geophysical and geological data, helped constrain and develop geological models. These models improved the understanding of crustal architecture in known hydrocarbon and metalliferous provinces as well as in frontier geological terrains.

Map compiled on request from AGS Native Title Case QUD6040/2001 Proclamation 2 See 2008/3111 for particulars.

The magnetotelluric (MT) data were acquired along a total of 690 km of the Youanmi deep seismic reflection traverses 10GA-YU1, 10GA-YU2 and 10GA-YU3-in Western Australia. This was a collaborative project between Geoscience Australia (GA) and the Geological Survey of Western Australia (GSWA), which provided the funding. The aim of the MT survey was to produce information of the electrical conductivity structure of the crust and upper mantle. This information is complementary to that obtained from deep seismic reflection, gravity, magnetic and geological data, which together provide new knowledge of the crustal architecture, rock properties and geodynamics of the region, important for helping to determine the potential for both mineral and energy resources. Data are supplied as EDI files with support information.

Map resulting from a request by Simon Moore, the DFAT resident officer in the Torres Strait. He wanted a diagram designed to be distributed to residents of the Torres Strait explaining the treaty arrangements. TRIM reference 2011-90238 Container 2010/4054

Map compiled on request from AGS Native Title Case QUD6040/2001 Proclamation 1 See 2008/3111 for particulars.

Crustal architecture in formerly contiguous basement terranes in SE Australia, Tasmania and northern Victoria Land is a legacy of late Neoproterozoic-Cambrian subduction-related processes, culminating in formation of the Delamerian-Ross orogen. Structures of Delamerian-Ross age were subsequently reactivated during late Mesozoic-Cenozoic Gondwana breakup, strongly influencing the geometry of continental rifting and providing clues about the origins and configuration of the pre-existing basement structures. An ocean-continent transform boundary developed off western Tasmania follows the trace of an older Paleozoic strike-slip structure (Avoca-Sorell fault) optimally oriented for reactivation during final separation of Australia from Antarctica. This boundary cuts across rocks preserving an earlier record of arc-continent collision during the course of which continental crust was subducted to mantle depths and Cambrian mafic-ultramafic island arc rocks were emplaced westwards over late Neoproterozoic passive margin sequences deposited during Rodinia breakup. Following a change to transcurrent motion along the Gondwana margin, Tasmania migrated northward along the Avoca fault system. This process arrested with entry of continental crust (Selwyn block) into a subduction zone located along the Heathcote-Governor fault systems, precipitating a second collision event accompanied by south-vergent thrusting, blueschist facies metamorphism and tectonic reworking of the already accreted Cambrian arc-forearc complex and underlying passive margin sequences.

Map of Australia showing the distribution of black coal, brown coal and Coal Seam Gas bearing basins overlain by prohibited areas. This map and enlargements of the Sydney, Bowen/Surat and Arckaringa basins were provided to DoFD as part advice regarding CSG exploration and coal extraction on commonwealth lands. These maps and their subsets are in 'DRAFT' form and are for internal use only.

As part of the Australian Government's Onshore Energy Security Program (2006-2011) Geoscience Australia in collaboration with Geological Survey of Western Australia acquired magnetotelluric (MT) data along the deep crustal seismic reflection transect across the Yilgarn Craton, Officer Basin and Musgrave Province in Central Western Australia. The aim of the MT survey is to map the electrical resistivity distribution and improve scientific understanding of the crustal and upper mantle structure in this region. This information is complementary to that obtained from deep crustal seismic reflection, seismic refraction, potential field and geological data, which together provide new knowledge of the crustal architecture and geodynamics of the region. It is important for helping to determine the potential for both mineral and energy resources. Data are supplied as EDI files with support information.

Magnetotelluric survey data acquired in association with the L189 Gawler-Curnamona-Arrowie Deep Crustal Seismic Survey over the Curnamona Province. This survey was funded through the Onshore Energy Security Program. Data was acquired by Quantec Geoscience. Analysis and modelling was undertaken by Geoscience Australia . The aim of the survey was to produce a two-dimensional image of electrical conductivity structure of the crust and upper mantle over the Curnamona Province. This information is complementary to the reflection seismic and gravity data acquired along the 08GA-C1 traverse. Data are supplied as EDI files with support information.

Magnetotelluric survey data acquired in association with the L192 Georgina-Arunta Deep Crustal Seismic Survey. This survey was funded through the Onshore Energy Security Program using the Auscope equipment from the ANSIR pool. The aim of the survey was to produce a two-dimensional image of electrical conductivity structure of the crust and upper mantle over the western Georgina Basin and the Arunta region of the Northern Territory. This information is complementary to the reflection seismic and gravity data acquired along the 09GA-GA1 traverse. Data are supplied as EDI files with support information.