Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models

Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models

21 pages, 8 figures, 1 table

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Bibliographic Details
Main Authors: Von Huene, Roland, Ranero, César R., Scholl, Dave W.
Format: capítulo de libro biblioteca
Language:English
Published: Springer 2009
Subjects:Convergent margins, Subduction erosion, Accretion,
Online Access:http://hdl.handle.net/10261/83778
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spelling dig-icm-es-10261-837782020-12-15T11:00:16Z Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models Von Huene, Roland Ranero, César R. Scholl, Dave W. Convergent margins Subduction erosion Accretion 21 pages, 8 figures, 1 table Understanding the mechanics of convergent margins is fundamental to assessing risks from earthquakes and trans-oceanic tsunamis. Marine observations of the past decade have advanced that understanding. A once commonly inferred accreted wedge extending from trench axes to shelves is now resolved into 3 domains of different mechanics in space, that vary during an earthquake cycle. The frontal prism increases weight on subducting materials elevating pore fl uid pressure and reducing interplate friction. The middle prism is moderately stable and merges into the more stable margin framework of the inner prism beneath the upper slope and shelf. Significant accretion occurs as material from the frontal prism is added to the middle prism. Accretion is common along thickly (>1 km) sedimented trenches and slowly converging margins. Rapid convergence enhances the effi ciency of sediment subduction and subduction erosion. The subduction channel on the lower plate accepts a fi nite amount of trench sediment and any excess is added to the frontal prism on the upper plate. Erosion beneath the middle slope contributes material to the subduction channel. Erosion and accretion can be coeval, for instance, subducted seamounts erode the upper plate as adjacent sediment accretes. The change in strain during interseismic locking that is released during coseismic slip, changes the dynamics of each segment in time. This helps explain extensional normal faults in a converging plate environment. Recent observations provide information for a unifying framework concept to aid interpretations of both accreting and eroding margins Peer Reviewed 2013-10-10T08:48:28Z 2013-10-10T08:48:28Z 2009 2013-10-10T08:48:28Z capítulo de libro http://purl.org/coar/resource_type/c_3248 isbn: 978-3-540-87971-8 issn: 1863-4621 Subduction Zone Geodynamics: 137-157 (2009) http://hdl.handle.net/10261/83778 10.1007/978-3-540-87974-9_8 en https://doi.org/10.1007/978-3-540-87974-9_8 none Springer
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Convergent margins
Subduction erosion
Accretion
Convergent margins
Subduction erosion
Accretion
spellingShingle Convergent margins
Subduction erosion
Accretion
Convergent margins
Subduction erosion
Accretion
Von Huene, Roland
Ranero, César R.
Scholl, Dave W.
Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
description 21 pages, 8 figures, 1 table
format capítulo de libro
topic_facet Convergent margins
Subduction erosion
Accretion
author Von Huene, Roland
Ranero, César R.
Scholl, Dave W.
author_facet Von Huene, Roland
Ranero, César R.
Scholl, Dave W.
author_sort Von Huene, Roland
title Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
title_short Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
title_full Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
title_fullStr Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
title_full_unstemmed Convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
title_sort convergent margin structure in high-quality geophysical images and current kinematic and dynamic models
publisher Springer
publishDate 2009
url http://hdl.handle.net/10261/83778
work_keys_str_mv AT vonhueneroland convergentmarginstructureinhighqualitygeophysicalimagesandcurrentkinematicanddynamicmodels
AT ranerocesarr convergentmarginstructureinhighqualitygeophysicalimagesandcurrentkinematicanddynamicmodels
AT scholldavew convergentmarginstructureinhighqualitygeophysicalimagesandcurrentkinematicanddynamicmodels
_version_ 1777665968757014528

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