Relationship between bend-faulting at trenches and intermediate-depth seismicity
25 pages, 13 figures, 3 tables, 2 appendixes supporting information https://doi.org/10.1029/2005GC000997.-- This is SFB574 contribution 74
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American Geophysical Union
2005-12
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| Subjects: | Subduction zones, Plate bending and faulting, Intermediate-depth seismicity, |
| Online Access: | http://hdl.handle.net/10261/134216 |
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dig-icm-es-10261-1342162020-12-10T11:54:30Z Relationship between bend-faulting at trenches and intermediate-depth seismicity Ranero, César R. Villaseñor, Antonio Morgan, J. Phipps Weinrebe, Wilhelm Subduction zones Plate bending and faulting Intermediate-depth seismicity 25 pages, 13 figures, 3 tables, 2 appendixes supporting information https://doi.org/10.1029/2005GC000997.-- This is SFB574 contribution 74 We have studied faulting associated with bending of the incoming oceanic plate along segments of Middle America and Chile subduction zones and its relationship to intermediate-depth intraslab seismicity and slab geometry. Multibeam bathymetry shows that bending-related faulting forms patterns made of sets of faults with orientations ranging from parallel to almost perpendicular to the trench axis. These fault patterns may change along a single subduction zone within along-strike distances of several hundred kilometers or less. Where available, near-trench intraplate earthquakes show normal-fault focal mechanisms consistent with mapped bending-related normal faults. The strike of bending-related faults in the incoming oceanic plate is remarkably similar to the strike of the nodal planes of intermediate-depth earthquakes for each segment of the study areas. This similarity in strike is observed even for faults oriented very oblique to the trench and slab strikes. Thus, in the studied subduction zones, results strongly support that many intraslab earthquakes do not occur along the planes of maximum shear within the slab and that much intermediate-depth seismicity occurs by reactivation of faults formed by plate bending near the trench. Furthermore, a qualitative relationship between trench faulting and intraslab seismicity is indicated by segments of the incoming plate with pervasive bend-faulting that correspond to segments of the slabs with higher intermediate-depth seismicity. Copyright 2005 by the American Geophysical Union A. Villaseñor was supported by ISES (Nether- lands Research Center for Integrated Solid Earth Science) and by Sonderforschungsbereich 574 (SFB574) of University of Kiel during his visits to GEOMAR to work on this project Peer Reviewed 2016-06-29T10:33:19Z 2016-06-29T10:33:19Z 2005-12 2016-06-29T10:33:19Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1029/2005GC000997 e-issn: 1525-2027 Geochemistry, Geophysics, Geosystems 6(12): Q12002 (2005) http://hdl.handle.net/10261/134216 10.1029/2005GC000997 Publisher's version https://doi.org/10.1029/2005GC000997 Sí open American Geophysical Union |
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Subduction zones Plate bending and faulting Intermediate-depth seismicity Subduction zones Plate bending and faulting Intermediate-depth seismicity |
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Subduction zones Plate bending and faulting Intermediate-depth seismicity Subduction zones Plate bending and faulting Intermediate-depth seismicity Ranero, César R. Villaseñor, Antonio Morgan, J. Phipps Weinrebe, Wilhelm Relationship between bend-faulting at trenches and intermediate-depth seismicity |
| description |
25 pages, 13 figures, 3 tables, 2 appendixes supporting information https://doi.org/10.1029/2005GC000997.-- This is SFB574 contribution 74 |
| format |
artículo |
| topic_facet |
Subduction zones Plate bending and faulting Intermediate-depth seismicity |
| author |
Ranero, César R. Villaseñor, Antonio Morgan, J. Phipps Weinrebe, Wilhelm |
| author_facet |
Ranero, César R. Villaseñor, Antonio Morgan, J. Phipps Weinrebe, Wilhelm |
| author_sort |
Ranero, César R. |
| title |
Relationship between bend-faulting at trenches and intermediate-depth seismicity |
| title_short |
Relationship between bend-faulting at trenches and intermediate-depth seismicity |
| title_full |
Relationship between bend-faulting at trenches and intermediate-depth seismicity |
| title_fullStr |
Relationship between bend-faulting at trenches and intermediate-depth seismicity |
| title_full_unstemmed |
Relationship between bend-faulting at trenches and intermediate-depth seismicity |
| title_sort |
relationship between bend-faulting at trenches and intermediate-depth seismicity |
| publisher |
American Geophysical Union |
| publishDate |
2005-12 |
| url |
http://hdl.handle.net/10261/134216 |
| work_keys_str_mv |
AT ranerocesarr relationshipbetweenbendfaultingattrenchesandintermediatedepthseismicity AT villasenorantonio relationshipbetweenbendfaultingattrenchesandintermediatedepthseismicity AT morganjphipps relationshipbetweenbendfaultingattrenchesandintermediatedepthseismicity AT weinrebewilhelm relationshipbetweenbendfaultingattrenchesandintermediatedepthseismicity |
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1777666437192613888 |