VIMP Report 9 - A geological interpretation of the geophysical data from the Orbost 1994 airborne survey
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Product description:Download The downloadable version of this report is supplied in PDF format. Abstract A detailed magnetic and radiometric airborne survey was flown in eastern Victoria during early 1994 for the Geological Survey of Victoria (GSV). The helicopter survey was located between Ensay and Club Terrace where Palaeozoic rocks of the Lachlan Fold Belt outcrop or lie under shallow Cainozoic cover. The purpose of the survey was to encourage exploration activity in the area. The dataset provides information to delineate structural, sedimentary and igneous features and define areas for further investigation as well as provide detailed data to support the Orbost mapping project. The Orbost airborne survey was flown adjacent to two other airborne surveys and the information from these surveys was incorporated into the one dataset. The Lachlan Fold Belt is a region with a complex history of sedimentation and volcanism interrupted by several major deformations and periods of intrusion. The geophysical interpretation identifies lineaments and units interpreted from contours and total magnetic intensity and radiometric images. The interpretation of the TMI and radiometric data is presented in the form of two colour prints at 1:100 000 scale. Units identified by the survey include the Mt Elizabeth Complex, the Snowy River Volcanics, numerous intrusives, the Buchan Group and Quaternary and Tertiary sediments. Numerous lineaments and faults accompanied by magnetic dykes reflect the strong deformation which has influenced the region. The relationship of mine locations to structural features and the zones of radiometric alteration and position of magnetic anomalies has been examined in detail using the Orbost data to identify prospective areas for exploration. Bibliographic reference Sands, B.C., 1995. A geological interpretation of the geophysical data from the Orbost 1994 airborne survey. Geological Survey of Victoria VIMP Report 9. Department of Agriculture, Energy and Minerals. Related products:
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