Major shear zones of southern Brazil and Uruguay: escape tectonics in the eastern border of Rio de La plata and Paranapanema cratons during the Western Gondwana amalgamation


Autoria(s): Passarelli, Claudia Regina; Basei, Miguel Angelo Stipp; WEMMER, K.; Siga Junior, Oswaldo; OYHANTCABAL, P.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2011

Resumo

The Mantiqueira Province represents a series of supracrustal segments of the South-American counterpart formed during the Gondwana Supercontinent agglutination. In this crustal domain, the process of escape tectonics played a conspicuous role, generating important NE-N-S-trending lineaments. The oblique component of the motions of the colliding tectonic blocks defined the transpressional character of the main suture zones: Lancinha-Itariri, Cubato-Arcadia-Areal, Serrinha-Rio Palmital in the Ribeira Belt and Sierra Ballena-Major Gercino in the Dom Feliciano Belt. The process as a whole lasted for ca. 60 Ma, since the initial collision phase until the lateral escape phase predominantly marked by dextral and subordinate sinistral transpressional shear zones. In the Dom Feliciano Belt, southern Brazil and Uruguay, transpressional event at 630-600 Ma is recognized and in the Ribeira Belt, despite less coevally, the transpressional event occurred between 590 and 560 Ma in its northern-central portion and between ca. 625 and 595 Ma in its central-southern portion. The kinematics of several shear zones with simultaneous movement in opposite directions at their terminations is explained by the sinuosity of these lineaments in relation to a predominantly continuous westward compression.

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FAPESP-Fundacao de Amparo a Pesquisa do Estado de Sao Paulo[03/13246-6]

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FAPESP-Fundacao de Amparo a Pesquisa do Estado de Sao Paulo[04/07837-4]

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FAPESP-Fundacao de Amparo a Pesquisa do Estado de Sao Paulo[05/58688-1]

Identificador

INTERNATIONAL JOURNAL OF EARTH SCIENCES, v.100, n.2/Mar, p.391-414, 2011

1437-3254

http://producao.usp.br/handle/BDPI/30219

10.1007/s00531-010-0594-2

http://dx.doi.org/10.1007/s00531-010-0594-2

Idioma(s)

eng

Publicador

SPRINGER

Relação

International Journal of Earth Sciences

Direitos

restrictedAccess

Copyright SPRINGER

Palavras-Chave #Mantiqueira Province #Gondwana agglutination #Suture zones #Escape tectonics #Metamorphic-deformational events #DOM-FELICIANO BELT #FISSION-TRACK ANALYSIS #CENTRAL RIBEIRA BELT #SAO-FRANCISCO CRATON #OROGEN SE BRAZIL #U-PB #PAN-AFRICAN #GEOCHRONOLOGICAL CONSTRAINTS #SOUTHEASTERN BRAZIL #CONTINENTAL COLLISION #Geosciences, Multidisciplinary
Tipo

article

original article

publishedVersion