Authors / CoAuthors
Rawlinson, N. | Houseman, G.A. | Collins, C.D.N. | Drummond, B.J.
Abstract
In a unique study, 44 land-based recorders distributed throughout Tasmania, SE Australia, were deployed to record seismic energy from an encircling array of marine normal-incidence reflection shot lines. We invert refraction and wide-angle reflection traveltimes for crustal structure, with the principal outcome being a map of the Tasmanian Moho. Key tectonic inferences from this map include: (1) the Arthur Lineament metamorphic belt in NW Tasmania overlies a major change in crustal thickness (over 5 km) and probably represents the NW limit of deformation in Tasmania during the Mid-Late Cambrian Tyennan Orogeny, (2) thickening of the crust beneath central northern Tasmania may be associated with the juxtaposition of the Eastern and Western Terranes during the Mid-Devonian Tabberabberan Orogeny, and (3) the difference in crustal thickness between the east and west coasts reflects the presence of differing strain regimes during the Cretaceous break-up of Gondwana. No evidence is found for thin-skinned deformation.
Product Type
nonGeographicDataset
eCat Id
36512
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Custodian
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- External PublicationScientific Journal Paper
- ( Theme )
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- seismics
- ( Theme )
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- structural geology
- ( Theme )
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- marine
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- AU-TAS
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2001-01-01T00:00:00
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geoscientificInformation
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[-44.0, -39.5, 143.5, 149.0]
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