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Age-dependent seismic thickness and mechanical strength of the Australian lithosphere

Simons, FJ; van der Hilst, RD; (2002) Age-dependent seismic thickness and mechanical strength of the Australian lithosphere. Geophysical Research Letters , 29 (11) , Article 1529. 10.1029/2002GL014962. Green open access

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Abstract

We present constraints on the regional variations of the seismic and mechanical thickness of the Australian lithosphere. We infer the seismic thickness from a waveform tomographic model of S-wave speed, and as a proxy for the elastic thickness we use the wavelength at which the coherence of surface topography and Bouguer gravity drops below half of its long-wavelength maximum. Our results show that on scales <1000 km the relationship between the age of the crust and the thickness of the lithosphere is more complicated than longer-wavelength or global averages suggest. Recent geochemical and geodynamical evidence for small-scale secular variations of the composition and stability of continental cratons further illustrates the complexity of the age dependence of seismo-mechanical lithospheric properties on regional scales.

Type: Article
Title: Age-dependent seismic thickness and mechanical strength of the Australian lithosphere
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2002GL014962
Publisher version: http://dx.doi.org/10.1029/2002GL014962
Language: English
Additional information: Copyright 2002 by the American Geophysical Union
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1090
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