Authors / CoAuthors
Kennett, B. L. N. | Gorbatov, A. | Yuan, H. | Agrawal, S. | Murdue, S. | Doublier, M. P. | Eakin, C. M. | Miller, M. S. | Zhao, L. | Czarnota, K. | O'Donnell, J. P. | Dentith, M. | Gessner, K.
Abstract
In recent years there has been a considerable expansion of deployments of portable seismic stations across Australia, which have been analysed by receiver function or autocorrelation methods to extract estimates of Moho depth. An ongoing program of full-crustal reflection profiles has now provided more than 25,000 km of reflection transects that have been interpreted for Moho structure. The Moho dataset is further augmented by extensive marine reflection results. These new data sources have been combined with earlier refraction and receiver function results to provide full continental coverage, though some desert areas remain with limited sampling. The dense sampling of the Moho indicates the presence of rapid changes in Moho depth and so the Moho surface has been constructed using an approach that allows different weighting and spatial influence depending on the nature of the estimate. The inclusion of Moho results from gravity inversion with low weighting helps to resolve the continent-ocean transition and to provide additional control in the least sampled zones. The refined distribution indicates the presence of widespread smaller-scale variations in Moho structure. Strong lateral contrasts in crustal thickness remain, but some have become more subdued with improved sampling of critical areas. The main differences from earlier results lie in previously poorly sampled regions around the Lake Eyre Basin, where additional passive seismic results indicate somewhat thicker crust though still witha strong contrast in crustal thickness to the cratonic zone to the west. Appeared in Geophysical Journal International, January 2023
Product Type
document
eCat Id
147374
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
- ( Project )
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- EFTF – Exploring for the Future
- ( Project )
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- AusArray
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- Crustal Structure
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- Controlled source seismology
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- Body waves
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- Australia
- theme.ANZRC Fields of Research.rdf
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- Seismology and seismic exploration
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- Published_External
Publication Date
2023-02-02T05:32:33
Creation Date
2022-10-28T20:00:00
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completed
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asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
<div>Compilation of various datasets created by government and academic organizations in order to build an updated map of Moho structure</div>
Parent Information
Extents
[-44, -9, 112, 154]
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Spatial Resolution
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