New evidence of Tasmania's tectonic history from a novel seismic experiment

In March 1995, 44 land‐based recorders were deployed throughout Tasmania, SE Australia, 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 bei...

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Published in:Geophysical research letters 2001-09, Vol.28 (17), p.3337-3340
Main Authors: Rawlinson, N., Houseman, G. A., Collins, C. D. N., Drummond, B. J.
Format: Article
Language:English
Subjects:
Applied geophysics
Earth sciences
Earth, ocean, space
Exact sciences and technology
Internal geophysics
Tectonics. Structural geology. Plate tectonics
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cited_by cdi_FETCH-LOGICAL-a4048-556ec30d2a8c351567853ebd8f4f6f50e6ae4ec0043c0d6d640a52dcc8975b643
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container_end_page 3340
container_issue 17
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container_title Geophysical research letters
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creator Rawlinson, N.
Houseman, G. A.
Collins, C. D. N.
Drummond, B. J.
description In March 1995, 44 land‐based recorders were deployed throughout Tasmania, SE Australia, 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 Tasmania 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.
doi_str_mv 10.1029/2001GL013342
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subjects Applied geophysics
Earth sciences
Earth, ocean, space
Exact sciences and technology
Internal geophysics
Tectonics. Structural geology. Plate tectonics
title New evidence of Tasmania's tectonic history from a novel seismic experiment
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