Evidence for basement controls on Neogene-present tectonic reactivation on the North West Shelf, Australia: An analysis of Phanerozoic structural features of the Caswell sub-basin

Victoria Holloway

doi:10.26182/rpq4-s368

Evidence for basement controls on Neogene-present tectonic reactivation on the North West Shelf, Australia: An analysis of Phanerozoic structural features of the Caswell sub-basin

Victoria Holloway

School of Earth Sciences

Research output: Thesis › Doctoral Thesis

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Abstract

The regional present-day maximum horizontal stress in the Caswell sub-basin, North West Shelf Australia, is indicated by our newly calculated earthquake focal mechanisms to be orientated NE-SW, however, within the basin Miocene-present-day extensional faults strike 090 N/S. This thesis shows that despite the lack of hard linkage between the Permo-Triassic basement fault group and the Neogene-present-day fault group, strain does propagate within the basin and the Permo-Triassicbasement structure is a primary control on subsequent strain propagation and geological processes.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Keep, Myra, Supervisor Bourget, Julien, Supervisor Langhi, Laurent , Supervisor, External person
Thesis sponsors	Australian Government Research Training Program
Award date	11 Nov 2024
DOIs	https://doi.org/10.26182/rpq4-s368
Publication status	Unpublished - 2024

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10.26182/rpq4-s368

THESIS - DOCTOR OF PHILOSOPHY - HOLLOWAY Victoria Lee - 2024_
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Cite this

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N2 - The regional present-day maximum horizontal stress in the Caswell sub-basin, North West Shelf Australia, is indicated by our newly calculated earthquake focal mechanisms to be orientated NE-SW, however, within the basin Miocene-present-day extensional faults strike 090 N/S. This thesis shows that despite the lack of hard linkage between the Permo-Triassic basement fault group and the Neogene-present-day fault group, strain does propagate within the basin and the Permo-Triassicbasement structure is a primary control on subsequent strain propagation and geological processes.

AB - The regional present-day maximum horizontal stress in the Caswell sub-basin, North West Shelf Australia, is indicated by our newly calculated earthquake focal mechanisms to be orientated NE-SW, however, within the basin Miocene-present-day extensional faults strike 090 N/S. This thesis shows that despite the lack of hard linkage between the Permo-Triassic basement fault group and the Neogene-present-day fault group, strain does propagate within the basin and the Permo-Triassicbasement structure is a primary control on subsequent strain propagation and geological processes.

KW - Tectonics

KW - Fault reactivation

KW - Seismic

KW - Earthquakes

KW - Browse Basin

U2 - 10.26182/rpq4-s368

DO - 10.26182/rpq4-s368

M3 - Doctoral Thesis

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Evidence for basement controls on Neogene-present tectonic reactivation on the North West Shelf, Australia: An analysis of Phanerozoic structural features of the Caswell sub-basin

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