Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin
European Geosciences Union (EGU) General Assembly 2018, 8-13 April 2018, Vienna, Austria.-- 1 page
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2018-04-13
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dig-icm-es-10261-1853782020-09-02T15:55:28Z Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin Ranero, César R. Sallarès, Valentí Zitellini, Nevio European Geosciences Union (EGU) General Assembly 2018, 8-13 April 2018, Vienna, Austria.-- 1 page We present seismic of the opening of the Tyrrhenian basin. Previous work with extensive wide-angle seismic data crossing the basin in 7 transects (collected in 2010 and 2015) provide P-wave velocity models that support the presence of oceanic-like magmatism after an abrupt breakup in a backarc spreading setting. However the magmatic phase stopped and was followed by a phase of mantle exhumation constrained by P and S wave velocity models, and groundtruth by an existing ODP drill samples. The wide-angle data indicates that mantle exhumation has occurred in several episodes through time and that mantle rocks floors most of the Vavilov and Marsilli sub-basins of the Tyrrhenian basin. We show that in the Vavilov basin mantle exhumation was largely accomplished by largescale detachment faulting producing the well-know core-complex geometry, similar to structures described in slow & ultra-slow spreading centers. However, detailed stratigraphic information calibrated with drilling information provides accurate constrained rates of opening. The stratigraphy supports that mantle exhumation (after backarc seafloor-spreading stopped) opened at fast rates comparable to the East Pacific Rise, a mid ocean ridge where magmatism is robust, core complexes have not been observed, and mantle exhumation has not been described. We propose that small-scale pre-existing mantle heterogeneities may condition the deformation style, melt production and thus the architecture of the continent ocean transition at rifted continental margins Peer Reviewed 2019-07-03T12:05:32Z 2019-07-03T12:05:32Z 2018-04-13 2019-07-03T12:05:32Z póster de congreso http://purl.org/coar/resource_type/c_6670 issn: 1607-7962 Geophysical Research Abstracts 20: EGU2018-17698 (2018) http://hdl.handle.net/10261/185378 Publisher's version https://meetingorganizer.copernicus.org/EGU2018/posters/27976 Sí open European Geosciences Union |
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European Geosciences Union (EGU) General Assembly 2018, 8-13 April 2018, Vienna, Austria.-- 1 page |
| format |
póster de congreso |
| author |
Ranero, César R. Sallarès, Valentí Zitellini, Nevio |
| spellingShingle |
Ranero, César R. Sallarès, Valentí Zitellini, Nevio Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin |
| author_facet |
Ranero, César R. Sallarès, Valentí Zitellini, Nevio |
| author_sort |
Ranero, César R. |
| title |
Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin |
| title_short |
Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin |
| title_full |
Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin |
| title_fullStr |
Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin |
| title_full_unstemmed |
Detachment faulting and mantle exhumation at fast opening rates in the Tyrrhenian Basin |
| title_sort |
detachment faulting and mantle exhumation at fast opening rates in the tyrrhenian basin |
| publisher |
European Geosciences Union |
| publishDate |
2018-04-13 |
| url |
http://hdl.handle.net/10261/185378 |
| work_keys_str_mv |
AT ranerocesarr detachmentfaultingandmantleexhumationatfastopeningratesinthetyrrhenianbasin AT sallaresvalenti detachmentfaultingandmantleexhumationatfastopeningratesinthetyrrhenianbasin AT zitellininevio detachmentfaultingandmantleexhumationatfastopeningratesinthetyrrhenianbasin |
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1777666953936109568 |