Tidal gravity anomalies as a tool to measure rheological properties of the continental lithosphere: application to the South American Plate

Tidal gravity anomalies as a tool to measure rheological properties of the continental lithosphere: application to the South American Plate

Autor Mantovani, MSM Google Scholar
Freitas, SRC de Google Scholar
Shukowsky, W. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Univ Fed Parana
Resumo Characterization of the bulk physical properties of individual tectonic units is important for understanding the dynamics of continental evolution. One important parameter is effective elastic thickness (T-e), a measurement of the flexural strength of the lithosphere. T-e is traditionally estimated by examination of the transfer function between gravity and topography. Sparse gravity data coverage limits the application of this method in South America. Instead. we use an empirical correlation (as defined by data from Australia and by the world databank) between tidal gravity anomalies and T-e to estimate T-e for tectonic units of South America. Our results are consistent with independent determinations of T-e in several sub-regions of South America. Although the empirical correlation appears to be quite strong, further research needs to be done to develop a physical theory for the connection between gravity tide anomalies (which sample an essentially instantaneous theological response of the Earth) and T-e (which measures the theological response of the Earth at geological time scales). (C) 2001 Elsevier B.V. All rights reserved.
Palavra-chave tidal gravity anomalies
continental lithosphere
evolution
Idioma Inglês
Data de publicação 2001-04-01
Publicado em Journal of South American Earth Sciences. Oxford: Pergamon-Elsevier B.V., v. 14, n. 1, p. 1-14, 2001.
ISSN 0895-9811 (Sherpa/Romeo, fator de impacto)
Publicador Elsevier B.V.
Extensão 1-14
Fonte http://dx.doi.org/10.1016/S0895-9811(00)00061-4
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000168573300001
Endereço permanente http://repositorio.unifesp.br/handle/11600/26520

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