Geophysical evidence for the role of fluids in accretionary wedge tectonics
The seismic-reflection technique, by imaging lithological and structural boundaries, can largely define the framework upon which models of the fluid-flow régimes of accretionary wedges are hung. The distribution of fluid loss from the sediments that form the accretionary wedge and that lie beneath i...
Published in: | Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences |
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Online Access: | http://dx.doi.org/10.1098/rsta.1991.0044 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1991.0044 |
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crroyalsociety:10.1098/rsta.1991.0044 2024-06-02T08:10:24+00:00 Geophysical evidence for the role of fluids in accretionary wedge tectonics 1991 http://dx.doi.org/10.1098/rsta.1991.0044 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1991.0044 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences volume 335, issue 1638, page 227-242 ISSN 0962-8428 2054-0299 journal-article 1991 crroyalsociety https://doi.org/10.1098/rsta.1991.0044 2024-05-07T14:16:14Z The seismic-reflection technique, by imaging lithological and structural boundaries, can largely define the framework upon which models of the fluid-flow régimes of accretionary wedges are hung. The distribution of fluid loss from the sediments that form the accretionary wedge and that lie beneath it, can be estimated from variation in seismic velocity as a measure of change in porosity, in conjunction with the interpretation of the structural evolution derived from seismic-reflection sections. Seismic techniques have detected regions of pronounced undercompaction believed to be associated with overpressured pore fluid, and detailed modelling has defined zones of localized fluid overpressuring, such as the decollements beneath wedges. The measurement of heat flow, directly, or indirectly from the methane-hydrate seismic reflector, can be used to detect the outflow of fluids, and map its variation in relation to structure and lithology. Geophysical techniques will achieve their full potential in constraining models of the behaviour of accretionary wedges, when calibrated from borehole measurements. Article in Journal/Newspaper Methane hydrate The Royal Society Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences 335 1638 227 242 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
The seismic-reflection technique, by imaging lithological and structural boundaries, can largely define the framework upon which models of the fluid-flow régimes of accretionary wedges are hung. The distribution of fluid loss from the sediments that form the accretionary wedge and that lie beneath it, can be estimated from variation in seismic velocity as a measure of change in porosity, in conjunction with the interpretation of the structural evolution derived from seismic-reflection sections. Seismic techniques have detected regions of pronounced undercompaction believed to be associated with overpressured pore fluid, and detailed modelling has defined zones of localized fluid overpressuring, such as the decollements beneath wedges. The measurement of heat flow, directly, or indirectly from the methane-hydrate seismic reflector, can be used to detect the outflow of fluids, and map its variation in relation to structure and lithology. Geophysical techniques will achieve their full potential in constraining models of the behaviour of accretionary wedges, when calibrated from borehole measurements. |
format |
Article in Journal/Newspaper |
title |
Geophysical evidence for the role of fluids in accretionary wedge tectonics |
spellingShingle |
Geophysical evidence for the role of fluids in accretionary wedge tectonics |
title_short |
Geophysical evidence for the role of fluids in accretionary wedge tectonics |
title_full |
Geophysical evidence for the role of fluids in accretionary wedge tectonics |
title_fullStr |
Geophysical evidence for the role of fluids in accretionary wedge tectonics |
title_full_unstemmed |
Geophysical evidence for the role of fluids in accretionary wedge tectonics |
title_sort |
geophysical evidence for the role of fluids in accretionary wedge tectonics |
publisher |
The Royal Society |
publishDate |
1991 |
url |
http://dx.doi.org/10.1098/rsta.1991.0044 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1991.0044 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences volume 335, issue 1638, page 227-242 ISSN 0962-8428 2054-0299 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.1991.0044 |
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Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences |
container_volume |
335 |
container_issue |
1638 |
container_start_page |
227 |
op_container_end_page |
242 |
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1800756269329416192 |