Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Registro completo
Provedor de dados:  ArchiMer
País:  France
Título:  Moho depth and crustal thinning in the Marmara Sea region from gravity data inversion
Autores:  Kende, Julia
Henry, P.
Bayrakci, G.
Ozeren, M. S.
Grall, C
Data:  2017-02
Ano:  2017
Resumo:  The free-air gravity in the Marmara Sea reveals that the low density of sedimentary basins is partly compensated in the lower crust. We compiled geophysical upper crust studies to determine the sediment basin geometries in and around the Marmara Sea and corrected the gravity signal from this upper crust geology with the Parker method. Then, assuming long wavelength anomalies in the residual gravity signal is caused by variations in the Moho topography, we inverted the residual to build the Moho topography. The result shows that the Moho is uplifted on an area greater than the Marmara Sea with a maximum crust thinning beneath the basins where the Moho is at about 25 km, 5 km above the reference depth. We then evaluated the Neogene extension by comparing the surface covered by our 3-D thinned model with the surface covered by an unthinned model with same crustal volume. Comparing this surface with areal extension rate from GPS data, we found a good compatibility indicating that the extension rate averaged over the Sea of Marmara area probably remained close to its present-day value during major changes of tectonic regime, as the incursion of the North Anatolian Fault system during the Pliocene leads to the establishment of the dominantly strike-slip present-day system. We also show that crustal extension is distributed over a wider domain in the lower crust than in the upper crust, and that this may be accounted for by a relatively minor component of lower crustal ductile flow.
Tipo:  Text
Idioma:  Inglês
Identificador:  https://archimer.ifremer.fr/doc/00371/48188/48303.pdf

https://archimer.ifremer.fr/doc/00371/48188/48304.pdf

DOI:10.1002/2015JB012735

https://archimer.ifremer.fr/doc/00371/48188/
Editor:  Amer Geophysical Union
Relação:  info:eu-repo/grantAgreement/EC/FP7/308417/EU//MARSITE
Formato:  application/pdf
Fonte:  Journal Of Geophysical Research-solid Earth (2169-9313) (Amer Geophysical Union), 2017-02 , Vol. 122 , N. 2 , P. 1381-1401
Direitos:  2016 American Geophysical Union. All Rights Reserved

info:eu-repo/semantics/openAccess

restricted use
Fechar
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional