An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method
We have developed a wavelet version of Forsyth's coherence method for estimating the effective elasticthickness (T e) of the lithosphere from gravity and topography. We have previously shown that the 'fan' wavelet is particularly well suited to making localised coherence estimates and...
| Main Authors: | , |
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| Format: | Journal Article |
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American Geophysical Union
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/20396 |
| _version_ | 1848750293820375040 |
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| author | Swain, Christopher Kirby, Jonathan |
| author_facet | Swain, Christopher Kirby, Jonathan |
| author_sort | Swain, Christopher |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have developed a wavelet version of Forsyth's coherence method for estimating the effective elasticthickness (T e) of the lithosphere from gravity and topography. We have previously shown that the 'fan' wavelet is particularly well suited to making localised coherence estimates and here we progress the method by showing how the coherence can be modelled by using the wavelet transforms of gravity and topography to infer the initial loads that flex the plate. The effectiveness of the method is demonstrated on synthetic data from a model having a rectangular area of large T e embedded in a uniform low T e surrounding, and a load ratio that increases with wave number. The results for the Australia region show a 'core' of high T e under north and central Australia, with much lower values to the east and also, unexpectedly, under the western parts of the Yilgarn and Pilbara cratons. |
| first_indexed | 2025-11-14T07:34:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-20396 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:34:32Z |
| publishDate | 2006 |
| publisher | American Geophysical Union |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-203962019-02-19T04:26:46Z An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method Swain, Christopher Kirby, Jonathan wavelets Australia coherence Elastic thickness We have developed a wavelet version of Forsyth's coherence method for estimating the effective elasticthickness (T e) of the lithosphere from gravity and topography. We have previously shown that the 'fan' wavelet is particularly well suited to making localised coherence estimates and here we progress the method by showing how the coherence can be modelled by using the wavelet transforms of gravity and topography to infer the initial loads that flex the plate. The effectiveness of the method is demonstrated on synthetic data from a model having a rectangular area of large T e embedded in a uniform low T e surrounding, and a load ratio that increases with wave number. The results for the Australia region show a 'core' of high T e under north and central Australia, with much lower values to the east and also, unexpectedly, under the western parts of the Yilgarn and Pilbara cratons. 2006 Journal Article http://hdl.handle.net/20.500.11937/20396 10.1029/2005GL025090 American Geophysical Union fulltext |
| spellingShingle | wavelets Australia coherence Elastic thickness Swain, Christopher Kirby, Jonathan An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method |
| title | An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method |
| title_full | An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method |
| title_fullStr | An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method |
| title_full_unstemmed | An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method |
| title_short | An effective elastic thickness map of Australia from wavelet transforms of gravity and topography using Forsyth's method |
| title_sort | effective elastic thickness map of australia from wavelet transforms of gravity and topography using forsyth's method |
| topic | wavelets Australia coherence Elastic thickness |
| url | http://hdl.handle.net/20.500.11937/20396 |