From Geoscience Australia

Neotectonic constraint on models of strain localisation within Australian Stable Continental Region (SCR) crust

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Created 14/01/2025

Updated 14/01/2025

The mechanisms that lead to the localisation of stable continental region (SCR) seismicity, and strain more generally, remain poorly understood. Recent work has emphasised correlations between the historical record of earthquake epicentres and lateral changes in the thickness, composition and/or viscosity (thermal state) of the lithospheric mantle, as inferred from seismic velocity/attenuation constraints. Fluid flow and the distribution of heat production within the crust have also been cited as controls on the location of contemporary seismicity. The plate margin-centric hypothesis that the loading rate of crustal faults can been understood in terms of the strain rate of the underlying lithospheric mantle has been challenged in that a space-geodetic strain signal is yet to be measured in many SCRs. Alternatives involving the release of elastic energy from a pre-stressed lithosphere have been proposed.

The Australian SCR crust preserves a rich but largely unexplored record of seismogenic crustal deformation spanning a time period much greater than that provided by the historical record of seismicity. Variations in the distribution, cumulative displacement, and recurrence characteristics of neotectonic faults provide important constraint for models of strain localisation mechanisms within SCR crust, with global application. This paper presents two endmember case studies that illustrate the variation in deformation characteristics encountered within Australian SCR crust, and which demonstrate the range and nature of the constraint that might be imposed on models describing crustal deformation and seismic hazard.

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Field Value
Title Neotectonic constraint on models of strain localisation within Australian Stable Continental Region (SCR) crust
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/eecee863-7073-4a40-8c80-7dd4b700cab4
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 08/04/2019
Geospatial Coverage {"type": "Polygon", "coordinates": [[[112.0, -44.0], [154.0, -44.0], [154.0, -9.0], [112.0, -9.0], [112.0, -44.0]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Neotectonic constraint on models of strain localisation within Australian Stable Continental Region (SCR) crust". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/neotectonic-constraint-on-models-of-strain-localisation-within-australian-stable-continental-re

No duplicate datasets found.