Crustal Structure of the east Gondwana margin in southeast Australia revealed by transdimensional ambient seismic noise tomography

M. K. Young, R. A. Cayley, M. A. McLean, N. Rawlinson, P. Arroucau, M. Salmon

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

[1] Ambient seismic noise data from the ongoing WOMBAT transportable seismic array in southeast Australia, the largest deployment of its kind in the Southern Hemisphere, are used to produce a high-resolution 3-D shear wave velocity model of the region. We apply a two-stage, transdimensional, hierarchical Bayesian inversion approach to recover phase velocity maps at periods of 1–20 s and then invert phase velocity dispersion for 3-D shear wave velocity structure to the base of the crust. Data uncertainty is propagated through the sequence of inversions, ensuring that model complexity is justified by the quality and quantity of the measurements. The pattern of 3-D velocity variations helps elucidate the geometry and position of key crustal features—such as the Torrens Hinge Zone—associated with the transition from Paleozoic eastern Australia to Precambrian central and western Australia that formed along the proto-Pacific margin of east Gondwana.
Original languageEnglish
Pages (from-to)4266-4271
Number of pages6
JournalGeophysical Research Letters
Volume40
Issue number16
Early online date27 Aug 2013
DOIs
Publication statusPublished - 28 Aug 2013

Keywords

  • Australia
  • Gondwana
  • tomography
  • Bayesian
  • Torrens Hinge Zone

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