Geodynamic implications of the Capricorn deep seismic survey from the Pilbara Craton, across the Capricorn orogen, to the Yilgarn Craton  


Authors / CoAuthors

Korsch, R.J. | Johnson, S.P. | Tyler, I.M. | Thorne, A.M. | Blewett, R.S. | Cutten, H.N. | Joly, A. | Dentith, M.C. | Aitken, A. | Goodwin, J. | Kennett, B.L.N.

Abstract

Interpretation of the Capricorn deep seismic reflection survey has provided images which allow us to examine the geodynamic relationships between the Pilbara Craton, Capricorn Orogen and Yilgarn Craton in Western Australia. Prior to the seismic survey, suture zones were proposed at the Talga Fault, between the Pilbara Craton and the Capricorn Orogen, and at the Errabiddy Shear Zone between the Yilgarn Craton and the Glenburgh Terrane, the southernmost component of the Capricorn Orogen. Our interpretation of the seismic lines indicates that there is a suture between the Pilbara Craton and the newly-recognised Bandee Seismic Province. Our interpretation also suggests that the Capricorn Orogen can be subdivided into at least two discrete crustal blocks, with the interpretation of a suture between them at the Lyons River Fault. Finally, the seismic interpretation has confirmed previous interpretations that the crustal architecture between the Narryer Terrane of the Yilgarn Craton and the Glenburgh Terrane consists of a south-dipping structure in the middle to lower crust, with the Errabiddy Shear Zone being an upper crustal thrust system where the Glenburgh Terrane has been thrust to the south over the Narryer Terrane.

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nonGeographicDataset

eCat Id

73031

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MNHD  

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Australia

Keywords

  • External Publication
( Theme )
  • seismic sections
( Theme )
  • geodynamics
( Theme )
  • structural geology
( Theme )
  • tectonic history
Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences
  • Published_Internal

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2011-11-02T00:00:00

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