Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise
One of the most hotly debated topics in Australian geology pertains to the tectonic relationship between Tasmania and mainland Australia. The focus of thisstudy is ambient seismic noise data from 24 broadband stations, which span northern Tasmania, several islands in Bass Strait (King Island, Deal I...
Published in: | ASEG Extended Abstracts |
---|---|
Main Authors: | , , , |
Format: | Conference Object |
Language: | English |
Published: |
ASEG-PESA
2013
|
Subjects: | |
Online Access: | https://doi.org/10.1071/ASEG2013ab337 http://ecite.utas.edu.au/86780 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:86780 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:86780 2023-05-15T18:25:38+02:00 Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise Pilia, S Rawlinson, N Direen, N Reading, A 2013 application/pdf https://doi.org/10.1071/ASEG2013ab337 http://ecite.utas.edu.au/86780 en eng ASEG-PESA http://ecite.utas.edu.au/86780/1/86780 - Beneath Bass Strait. linking Tasmania and mainland Australia using ambient seismic noise.pdf http://dx.doi.org/10.1071/ASEG2013ab337 Pilia, S and Rawlinson, N and Direen, N and Reading, A, Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise, Proceedings of the 23rd International Geophysical Conference and Exhibition, 11-14 August 2013, Melbourne, Australia, pp. 1-4. (2013) [Refereed Conference Paper] http://ecite.utas.edu.au/86780 Earth Sciences Geophysics Seismology and Seismic Exploration Refereed Conference Paper PeerReviewed 2013 ftunivtasecite https://doi.org/10.1071/ASEG2013ab337 2019-12-13T21:50:46Z One of the most hotly debated topics in Australian geology pertains to the tectonic relationship between Tasmania and mainland Australia. The focus of thisstudy is ambient seismic noise data from 24 broadband stations, which span northern Tasmania, several islands in Bass Strait (King Island, Deal Island and Flinders Island) and southern Victoria, thus providing a dense coverage of surface wave paths that can be exploited to image the 3-D structure of the crust joining Tasmania and Victoria in high detail. The new results of this studywill address fundamental questions regarding Tasmanias tectonic provenance and its enigmatic relationship with the mainland. Furthermore, they will impose important constraints on the broad scale geology of a highly prospective region that hosts significant hydrocarbon deposits. To produce the highest qualityGreens functions, careful processing of the data has been performed, after which group and phase velocity dispersion measurements have been carried out using a frequency-time analysis method on the symmetric component (average of the casual and acasual signal) of the empirical Greens functions (EGFs). The location of the experiment is such that the cross-correlations produce strong signal down to 1s period, thanks to the proximity of microseisms in Bass Strait and the Southern Ocean. Group and phase dispersion measurements from the EGFs have been inverted to obtain Rayleigh-wave group and phase velocity maps at different periods, which are expected to shed new light on the structure beneath Bass Strait. Conference Object Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean King Island ENVELOPE(-58.100,-58.100,-62.000,-62.000) Flinders ENVELOPE(-66.667,-66.667,-69.267,-69.267) ASEG Extended Abstracts 2013 1 1 4 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geophysics Seismology and Seismic Exploration |
spellingShingle |
Earth Sciences Geophysics Seismology and Seismic Exploration Pilia, S Rawlinson, N Direen, N Reading, A Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise |
topic_facet |
Earth Sciences Geophysics Seismology and Seismic Exploration |
description |
One of the most hotly debated topics in Australian geology pertains to the tectonic relationship between Tasmania and mainland Australia. The focus of thisstudy is ambient seismic noise data from 24 broadband stations, which span northern Tasmania, several islands in Bass Strait (King Island, Deal Island and Flinders Island) and southern Victoria, thus providing a dense coverage of surface wave paths that can be exploited to image the 3-D structure of the crust joining Tasmania and Victoria in high detail. The new results of this studywill address fundamental questions regarding Tasmanias tectonic provenance and its enigmatic relationship with the mainland. Furthermore, they will impose important constraints on the broad scale geology of a highly prospective region that hosts significant hydrocarbon deposits. To produce the highest qualityGreens functions, careful processing of the data has been performed, after which group and phase velocity dispersion measurements have been carried out using a frequency-time analysis method on the symmetric component (average of the casual and acasual signal) of the empirical Greens functions (EGFs). The location of the experiment is such that the cross-correlations produce strong signal down to 1s period, thanks to the proximity of microseisms in Bass Strait and the Southern Ocean. Group and phase dispersion measurements from the EGFs have been inverted to obtain Rayleigh-wave group and phase velocity maps at different periods, which are expected to shed new light on the structure beneath Bass Strait. |
format |
Conference Object |
author |
Pilia, S Rawlinson, N Direen, N Reading, A |
author_facet |
Pilia, S Rawlinson, N Direen, N Reading, A |
author_sort |
Pilia, S |
title |
Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise |
title_short |
Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise |
title_full |
Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise |
title_fullStr |
Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise |
title_full_unstemmed |
Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise |
title_sort |
beneath bass strait: linking tasmania and mainland australia using ambient seismic noise |
publisher |
ASEG-PESA |
publishDate |
2013 |
url |
https://doi.org/10.1071/ASEG2013ab337 http://ecite.utas.edu.au/86780 |
long_lat |
ENVELOPE(-58.100,-58.100,-62.000,-62.000) ENVELOPE(-66.667,-66.667,-69.267,-69.267) |
geographic |
Southern Ocean King Island Flinders |
geographic_facet |
Southern Ocean King Island Flinders |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://ecite.utas.edu.au/86780/1/86780 - Beneath Bass Strait. linking Tasmania and mainland Australia using ambient seismic noise.pdf http://dx.doi.org/10.1071/ASEG2013ab337 Pilia, S and Rawlinson, N and Direen, N and Reading, A, Beneath Bass Strait: linking Tasmania and mainland Australia using ambient seismic noise, Proceedings of the 23rd International Geophysical Conference and Exhibition, 11-14 August 2013, Melbourne, Australia, pp. 1-4. (2013) [Refereed Conference Paper] http://ecite.utas.edu.au/86780 |
op_doi |
https://doi.org/10.1071/ASEG2013ab337 |
container_title |
ASEG Extended Abstracts |
container_volume |
2013 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
4 |
_version_ |
1766207213649526784 |