Authors / CoAuthors
Dentith, M.C. | O'Neill, A. | Clark, D. | Evans, P.
Abstract
GPR data have been collected across confirmed palaeofault scarps at Hyden and Dumbelyung, and also the scarp created by the 1968 Meckering earthquake. In each case there is a nearby trench to allow GPR responses to be related to known geology. At Meckering and Hyden, where the near-surface material contains moderate amounts of clay and the groundwater is fresh, it has proved possible to collect high quality data that images colluvium and also disrupted bedrock features which allow faults to be inferred. At Dumbelyung, where the near surface is more conductive due to clay-rich alluvial deposits and saline groundwater, results were poor and no sub-surface features were confidently identified. Our results demonstrate that, subject to the satisfaction of a predictable set of ground conditions, GPR surveys are a valuable tool for studying palaeofaults in deeply weathered terrains. The results provide sufficient information to confirm a topographic feature is of seismic origin, and to aid in siting trenches for palaeoseismic studies.
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nonGeographicDataset
eCat Id
70782
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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2601
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Keywords
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- External PublicationScientific Journal Paper
- ( Theme )
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- geophysics
- ( Theme )
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- earthquakes
- ( Theme )
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- geology
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- AU-WA
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2010-01-01T00:00:00
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