Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/93057
COMPARTIR / EXPORTAR:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

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

AutorVendrell, M. G. CSIC; Ranero, César R. CSIC ORCID; Sallarès, Valentí CSIC ORCID ; Prada, Manel CSIC ORCID ; Moeller, Stefan; Grevemeyer, Ingo; Zitellini, Nevio
Fecha de publicación26-abr-2012
EditorEuropean Geosciences Union
CitaciónGeophysical Research Abstracts 14: EGU2012-13681 (2012)
ResumenThe 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
DescripciónEuropean Geosciences Union General Assembly 22-27 April 2012, Vienna, Austria.-- 1 page
Versión del editorhttp://meetingorganizer.copernicus.org/EGU2012/oral_programme/9434
URIhttp://hdl.handle.net/10261/93057
Aparece en las colecciones: (ICM) Comunicaciones congresos
(UTM) Comunicaciones congresos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
Vendrell_et_al_2012.pdf33,96 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

Page view(s)

197
checked on 28-mar-2024

Download(s)

57
checked on 28-mar-2024

Google ScholarTM

Check


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.