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The Tamworth Belt in Southern Queensland, Australia: thrust-characterized geometry concealed by Surat Basin sediments

By
W. Wartenberg
W. Wartenberg
1
Geologisches Institut, Rheinische Friedrich-Wilhelms-Universität Bonn, Nußallee 8, 53115 Bonn, Germany
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R. J. Korsch
R. J. Korsch
2
Australian Geodynamics Cooperative Research Centre, Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia
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A. Schäfer
A. Schäfer
1
Geologisches Institut, Rheinische Friedrich-Wilhelms-Universität Bonn, Nußallee 8, 53115 Bonn, Germany
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Published:
January 01, 2003

Abstract

The subsurface geometry and tectonic development of the Devonian-Carboniferous Tamworth Belt, a fore-arc basin in the New England Orogen, Eastern Australia, has been examined using seismic reflection, aeromagnetic and gravity data. The Tamworth Belt is bounded to the west by the Moonie Fault, a thrust fault, which exhibits a fault-bend-fold geometry. Two major westward-dipping faults form the main eastern boundary, with a series of eastward-dipping backthrusts located farther to the west. The eastern margin also coincides with a gravity and magnetic ridge, similar to the gravity and magnetic pattern of the serpentinites and iron-enriched rocks that are exposed along the Peel Fault to the south. In the investigated area, the Tamworth Belt is over 50 km wide and has been shortened by at least 10 km across strike. The sedimentary succession is at least 12 km thick and is moderately folded. Within the succession, six seismic sequences were identified, each of which is separated by a major sequence boundary.

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Contents

Geological Society, London, Special Publications

Tracing Tectonic Deformation Using the Sedimentary Record

T. McCann
T. McCann
Geologisches Institut, Bonn, Germany
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A. Saintot
A. Saintot
Instituut voor Aardwetenschappen, Vrije Universiteit, The Netherlands
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Geological Society of London
Volume
208
ISBN electronic:
9781862394568
Publication date:
January 01, 2003

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