http://www.cnr.it/ontology/cnr/individuo/prodotto/ID28970

Transition from continental break-up to punctiform seafloor spreading: How fast, symmetric and magmatic. (Articolo in rivista)

Type

Label

Transition from continental break-up to punctiform seafloor spreading: How fast, symmetric and magmatic. (Articolo in rivista) (literal)

Anno

Alternative label

CORTI G., VAN WIJK J., BONINI M., SOKOUTIS D., CLOETINGH S., INNOCENTI F., MANETTI P. (2003)
Transition from continental break-up to punctiform seafloor spreading: How fast, symmetric and magmatic.
in Geophysical research letters
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

CORTI G., VAN WIJK J., BONINI M., SOKOUTIS D., CLOETINGH S., INNOCENTI F., MANETTI P. (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

Two research teams from Italy and The Netherlands have developed the role of the lithospherical structure in the continental break-up by comparing the numerical and analogue models. This represents one of the very first attempts to conjugate two different approaches in the understanding the processes that lead to the sea-floor spreading. Geophysical Research Letters (GRL) is a reference journal for all researchers that are devoted to the understanding the geodynamical and geophysical processes in the Earth Interior. Furthermore, GRL is a fast peer-review journal that presents up-to-dated results in the Earth Sciences and this one of the most utilised journals for spreading new and innovative ideas (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

This paper reports an integrated numerical and analogue modelling study that focused on the role of inherited lithospheric anisotropies in controlling the process of continental break-up and eventual oceanization. Our results suggest that the pre-rift lithosphere configuration is able to control the continental rifting to a large extent. Particularly, our models highlight that the velocity of the break-up process, the amount of melt generated and the structure (width and symmetry) of the resulting passive margin pairs are largely controlled by the inherited Moho geometry. Additionally, the 3D picture of the break-up process provided by the analogue models outlines a two-phase tectonic history: a first phase, in which extension takes place contemporaneously along the whole rift structure, and a second phase characterised by the progressive propagation of periodic asthenospheric instabilities in an extension-orthogonal direction. (literal)

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

G.Corti 1), J.Van Wijk 2), M. Bonini 1) D. Sokoutis 2), S, Cloetingh 2), F. Innocenti 3), P. Manetti 1) 1 CNR-IGG, Sez. Firenze, via La Pira 4,Firenze 2 Netherlands Center for Integrated Solid Earth Sciences, Vrije Univ., De Boelelaan 1085, 1081 HV, Amsterdam, 3 Dip.ScienzeTerra, via S. Maria 53, Pisa (literal)

Titolo

Transition from continental break-up to punctiform seafloor spreading: How fast, symmetric and magmatic. (literal)

Abstract

We present a comparison between numerical and analogue models focusing on the role of inherited lithospheric structures in influencing the process of continental break-up. Our results highlight that the presence of pre-existing anisotropies localizes strain and favors continental break-up and formation of a new ocean. For a fixed strain rate, the pre-rift lithosphere configuration influences rift duration, melt production and width and symmetry of the continental margin pair. Model results show a mainly two-phase tectonic history from continental extension to oceanization. In the first phase extension affects contemporaneously the whole rift structure, while in the second phase asthenosphere upwelling occurs into punctiform regularly-spaced spots sequentially propagating in an extension-orthogonal direction. (literal)

Prodotto di