VIMP Report 33 - An appraisal of new airborne geophysical data over the Corryong region, northeastern Victoria
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Product description:Download The downloadable version of this report is supplied in PDF format. Abstract A detailed geophysical survey was flown over the Corryong, Holbrook (part), Rosewood (part) and Kosciusko (part) 1:100 000 map sheets in northeastern Victoria. The survey was flown during 1995, for the Geological Survey of Victoria, as part of the Victorian Initiative for Minerals and Petroleum Eastern Highlands project. The Corryong survey data were acquired by Geoterrex Pty Ltd using a helicopter mounted system. The magnetic data were acquired using a towed bird, while the radiometric data were collected using both upward and downward looking crystals. East - west flight lines were 200 m apart. The data includes magnetics, radiometrics and a digital terrain model. Products available from this survey include a range of maps and images on transparency or paper. In addition to hardcopy products, data is also available in digital form. Magnetic data reflect magnetic and non-magnetic intrusives, metamorphics, sediments, volcanics and dykes. Near surface compositional variations are reflected in the radiometric data. The digital terrain model is useful for mapping major structures. The Ordovician metamorphics and sediments are non-magnetic, although in some areas they have a high magnetic response superimposed from deep magnetic sources. These metamorphics and sediments are intruded by Silurian and Devonian plutons. The plutons are both magnetic and non-magnetic. Significant structural detail is apparent in the airborne magnetic and radiometric data. Interpretation of this data will contribute to the understanding of the structural history and terrane boundary relationships of the area. The Corryong region has had a long history of alluvial and primary gold production. The geophysical data may aid in the location and/or extension of mineralisation in the Corryong region. In particular, there is a possible correlation between linear, moderate magnetic anomalies and the faults which control vein gold mineralisation in the Corryong region. Bibliographic reference McDonald, P.A., 1996. An appraisal of new airborne geophysical data over the Corryong region, northeastern Victoria. Victorian Initiative for Minerals and Petroleum Report 33. Department of Natural Resources and Environment. Related products:
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