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

• Grant number: 09/17537-1
• Support Opportunities: 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 Investigator: Carlos José Archanjo
• Grantee: Luís Gustavo Ferreira Viegas
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

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

(4)

(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. (09/17537-1)

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. (09/17537-1)

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. (09/17537-1)

DE SOUZA, CAROLINA PEIXOTO; FERREIRA VIEGAS, LUIS GUSTAVO; MONTEFALCO DE LIRA SANTOS, LAURO CEZAR. eformation mechanisms, mineral chemistry and zircon U-Pb geochronological constraints in the south Patos shear zone: implications for the crustal evolution of the Borborema Province, NE Brazi. BRAZILIAN JOURNAL OF GEOLOGY, v. 51, n. 4, 2021. (09/17537-1)

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 (IG/BT) São Paulo.