This model was produced by The South Australian Centre for Mineral Exploration Under Cover (CMXUC), a collaborative research initiative of the Government of South Australia and the University of Adelaide. The northern to central Flinders Ranges area comprise uplifted and eroded remnants of openly folded sedimentary rocks that were deposited in an intra-continental arm of the Adelaide Geosyncline during the Neoproterozoic to Early Cambrian. Despite numerous studies, the geometry and evolution of the basin is still not well understood. This project aims to reconstruct the evolution from the Neoproterozoic to Quaternary and to model the geometry of the basement under cover.

The Burra (Burra) Mine, situated 150 km north of Adelaide within the Adelaide Geosyncline, produced 2.7 million tonnes of copper ore in two major mining phases: 1845 – 1877 and 1970 - 1981. The entire length of the pit is occupied by a diapiric body intruding the Skillogalee Dolomite and may extend up to 500 m to the west. Recognition that the porphyry and associated mineralisation are of similar age to the host Skillogalee Dolomite promotes large tracts of the Adelaide Geosyncline as prospective for similar mineralisation. The Burra mine 3D model was constructed using a georeferenced version of the original hand-drafted base map, which included elevation data points surveyed during the final phase of mining. These elevation locations and associated height data were digitised from the georeferenced map into a GIS point dataset. Borehole and survey station points were captured and saved in separate point datasets. The point dataset elevation values were transferred to the base plan polylines (where spatially coinicident), and these lines were used to generate a 3D triangular irregular network (TIN). Elevation points not spatially coincident with base plan lines were added to the TIN separately. The geology dataset was draped over the TIN in a 3D visualisation environment and was output to an Adobe 3D pdf format for display in Acrobat Reader TM.

This model was produced by The South Australian Centre for Mineral Exploration Under Cover (CMXUC), a collaborative research initiative of the Government of South Australia and the University of Adelaide. In this area, basement is buried beneath Neoproterozoic-Recent cover, of the Eastern Officer, Arckaringa and Eromanga Basins. The depth to basement horizon, shows the complex geometry of the Munyarai Trough which forms a foreland to the uplifted Musgrave Block; the Marla Overthrust Zone and Ammaroodinna Ridge which were uplifted after the deposition of Cambrian to Silurian sedimentary rocks; the Middle Bore Fault Zone which was last active during deposition of the Arckaringa Basin and the Wintinna Trough. Large potential field anomalies have been observed in the Marla Region of Northern South Australia and have been used to define the northern limit of the Gawler Craton. This project’s aim was to model the source of those anomalies in order to understand the sources of those anomalies.

This model was produced by The South Australian Centre for Mineral Exploration Under Cover (CMXUC), a collaborative research initiative of the Government of South Australia and the University of Adelaide. The northern to central Flinders Ranges area comprise uplifted and eroded remnants of openly folded sedimentary rocks that were deposited in an intra-continental arm of the Adelaide Geosyncline during the Neoproterozoic to Early Cambrian. Despite numerous studies, the geometry and evolution of the basin is still not well understood. This project aims to reconstruct the evolution from the Neoproterozoic to Quaternary and to model the geometry of the basement under cover.

The acquisition and interpretation of the deep crustal seismic line 13GA-EG1 has allowed a new 3D model to be constructed for the western Gawler Craton. The new 3D model expands on the Eastern Gawler IOGC / Woomera Prohibited Area model, which sits to the north and east of this seismic line. Interpretations used to construct this model were derived from a cross-border collaborative work program between the Geological Survey of South Australia, the Geological Survey of Western Australia and Geoscience Australia, initiated by the collection of seismic line 13GA-EG1. This is the first of three models which will cover the length of the seismic line 13GA-EG1; the others being the Albany-Fraser Orogen model in Western Australia and the Coompana model which straddles the WA/SA border. These are being worked on and will be published in the coming years to produce a continuous crustal architecture and density model between the Gawler and Yilgarn Cratons.

Curnamona Province was created as a convenient way of visualising the spatial distribution and thickness of these basinal sediments. The model enables users to make estimations of vertical distances from the surface to key surfaces, including depth to top of Palaeo-Mesoproterozoic, base of Cambrian, base of Mesozoic and base of Cenozoic. The inferred forms of these key surfaces are derived from a combination of drillhole data, seismic data interpretation and aeromagnetic data modelling.