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Deformation mechanisms and event chronology in the Patos shear zone, Borborema Province (Northeastern Brazil)

Grant number: 09/17537-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2010
Effective date (End): August 31, 2013
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal researcher:Carlos José Archanjo
Grantee:Luís Gustavo Ferreira Viegas
Home Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The Patos Shear Zone (PSZ) is a macroscale structure from the Borborema Province which evolution is intrinsically linked with the deformation of adjacent Neoproterozoic belts (Orós, Seridó and Cachoeirinha). The Patos Lineament is composed by large E-W to NE-SW mylonite belts which evolved from greenschist facies conditions in the southern part of the shear zone, to amphibolite, including migmatites, in the northern border of the shear zone. Migmatite domes poorly understood in terms of structure and chronology occur within the mylonite belts. This project intends to characterize the deformation mechanisms active during shear zone generation, observed mainly in the low- to high-grade mylonites. It is also concerned with chronology and emplacement processes of magmatic material and its correlation with mylonitization. These data are of crucial relevance to the understanding of the behavior of deformational processes active during the Neoproterozoic in the Borborema Province. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VIEGAS, LUIS GUSTAVO F.; ARCHANJO, CARLOS J.; HOLLANDA, MARIA HELENA B. M.; VAUCHEZ, ALAIN. Microfabrics and zircon U-Pb (SHRIMP) chronology of mylonites from the Patos shear zone (Borborema Province, NE Brazil). Precambrian Research, v. 243, p. 1-17, APR 2014. Web of Science Citations: 20.
ARCHANJO, CARLOS J.; VIEGAS, LUIZ G. F.; HOLLANDA, MARIA HELENA B. M.; SOUZA, LAECIO C.; LIU, DUNYI. Timing of the HT/LP transpression in the Neoproterozoic Serido Belt (Borborema Province, Brazil): Constraints from U-Pb (SHRIMP) geochronology and implications for the connections between NE Brazil and West Africa. GONDWANA RESEARCH, v. 23, n. 2, SI, p. 701-714, MAR 2013. Web of Science Citations: 33.
VIEGAS, LUIS GUSTAVO F.; ARCHANJO, CARLOS J.; VAUCHEZ, ALAIN. Fabrics of migmatites and the relationships between partial melting and deformation in high-grade transpressional shear zones: The Espinho Branco anatexite (Borborema Province, NE Brazil). JOURNAL OF STRUCTURAL GEOLOGY, v. 48, p. 45-56, MAR 2013. Web of Science Citations: 10.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
VIEGAS, Luís Gustavo Ferreira. Deformation mechanisms and chronology of events in the Patos shear zone (Borborema Province, NE Brazil. 2013. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Geociências São Paulo.

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