The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images

The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images

European Geosciences Union General Assembly 22-27 April 2012, Vienna, Austria.-- 1 page

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Main Authors: Vendrell, M. G., Ranero, César R., Sallarès, Valentí, Prada, Manel, Moeller, Stefan, Grevemeyer, Ingo, Zitellini, Nevio
Format: comunicación de congreso biblioteca
Published: European Geosciences Union 2012-04-26
Online Access:http://hdl.handle.net/10261/93057
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spelling dig-icm-es-10261-930572019-10-01T06:50:12Z The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images Vendrell, M. G. Ranero, César R. Sallarès, Valentí Prada, Manel Moeller, Stefan Grevemeyer, Ingo Zitellini, Nevio European Geosciences Union General Assembly 22-27 April 2012, Vienna, Austria.-- 1 page The Tyrrhenian basin has developed during the Neogene in a convergence setting between the Nubian and the European plates. The aim of this work is to unravel at basin-scale, the geological processes that have been working during the last 15 M.y. and giving the current structures. Data used in this study consist in a serie of multichannel seismic profiles acquired during the MEDOC survey with the Spanish R/V Sarmiento de Gamboa in 2010. These profiles have been processed to obtain images of the crustal structure. These seismic sections have been calibrated with data from some drillings from ODP (Oceanic Drilling Project) and DSDP (Deep Sea Drilling Project), for the identification of the main sedimentary units. In addition, this information has been integrated with full coverage multibeam bathymetry of the basin that permits to map the lateral extension of the main structures imaged in the seismic data. The seismic lines cross the entire basin at locations designed to provide images of the main tectonic units. The basin presents a strong lateral heterogeneity in the internal structure of the basement that may indicate lateral changes in its nature. The distribution of the sedimentary depositional centers, their size and thickness is also variable. We observe a transition from little extension in the northernmost region of the basin, to an increasing amount of extensions southeastwards, where extension has proceeded and may have lead to full crustal separation and mantle exhumation at the time of rifting. The conjugated margins show an asymmetric distribution of the extension and the relationships between faulting and sedimentary deposits. On the west side, the faults bound the largest sedimentary sub-basins in the Thyrrhenian, and conjugate side displays more dense faulting, but the faults have smaller offset, and lateral continuity implying smaller amounts of extensions. The sub-basins at this side are shallow and spatially restricted. The discontinuous nature of the deposits in gravens and half-gravens makes the correlation of sedimentary units difficult. The data shows that the basin crustal structure and the distribution of sedimentary deposits have been controlled by early extensional tectonics. Subsequent magmatism may have even dominated over tectonic stretching and finally the systems changed to produce crustal break up and mantle exhumation without no melting related to the extension Peer Reviewed 2014-03-06T07:34:16Z 2014-03-06T07:34:16Z 2012-04-26 2014-03-06T07:34:16Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 Geophysical Research Abstracts 14: EGU2012-13681 (2012) http://hdl.handle.net/10261/93057 #PLACEHOLDER_PARENT_METADATA_VALUE# https://creativecommons.org/licenses/by/3.0/legalcode http://meetingorganizer.copernicus.org/EGU2012/oral_programme/9434 open European Geosciences Union
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
description European Geosciences Union General Assembly 22-27 April 2012, Vienna, Austria.-- 1 page
format comunicación de congreso
author Vendrell, M. G.
Ranero, César R.
Sallarès, Valentí
Prada, Manel
Moeller, Stefan
Grevemeyer, Ingo
Zitellini, Nevio
spellingShingle Vendrell, M. G.
Ranero, César R.
Sallarès, Valentí
Prada, Manel
Moeller, Stefan
Grevemeyer, Ingo
Zitellini, Nevio
The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images
author_facet Vendrell, M. G.
Ranero, César R.
Sallarès, Valentí
Prada, Manel
Moeller, Stefan
Grevemeyer, Ingo
Zitellini, Nevio
author_sort Vendrell, M. G.
title The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images
title_short The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images
title_full The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images
title_fullStr The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images
title_full_unstemmed The tectonic and sedimentary structures of the Tyrrhenian rifted basin from multichannel seismic images
title_sort tectonic and sedimentary structures of the tyrrhenian rifted basin from multichannel seismic images
publisher European Geosciences Union
publishDate 2012-04-26
url http://hdl.handle.net/10261/93057
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