Electron Backscatter Diffraction (EBSD) analysis of deformation microstructures - Constraining rheology and deformation conditions of northern Borborema Province (NE Brazil)

• Grant number: 19/10167-6
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• Start date: September 20, 2019
• End date: December 05, 2019
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Carlos José Archanjo
• Grantee: Carlos Fernando Ávila Rodrigues
• Supervisor: John Paul Platt
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: University of Southern California (USC), United States
• Associated to the scholarship: 16/22226-9 - Deformation and chronology of the granitic magmatism associated with the Tauá and Senador Pompeu shear zones (Borborema Province, NE, Brazil), BP.DD

Abstract

Shear zones are important to processes of continental deformation during orogenesis and often determine the bulk strength of the lithosphere. The localization of deformation within shear zones produce specific rock deformation microstructures which result from activation of different mechanisms that accomodate plastic strain. The shear zones in the northern Borborema Province, subject of study in the present PhD project (FAPESP 2016/22226-9), provide a unique opportunity to investigate deformation conditions in orogenic cores at varied conditions. We propose to carry out an EBSD-based microstructural investigation of of Senador Pompeu and Tauá shear zones at the high-end microscopy facilities the Department of Earth Sciences at the University of Southern California, under supervision and collaboration of professor John Platt. This comprises an application for a one year period of the Research Internship Abroad project (BEPE - Bolsa de Estágio em Pesquisa no Exterior) funded by FAPESP, as conceived in the initial project of the ongoing PhD research. (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)

AVILA, CARLOS F.; ARCHANJO, CARLOS J.; HOLLANDA, MARIA HELENA B. M.; DE MACEDO FILHO, ANTOMAT A.; LEMOS-SANTOS, V, DANIEL DO. Shear zone cooling and fabrics of synkinematic plutons evidence timing and rates of orogenic exhumation in the northwest Borborema Province (NE Brazil). Precambrian Research, v. 350, NOV 2020. (19/10167-6, 17/21440-0, 16/22226-9)

AVILA, CARLOS F.; ARCHANJO, CARLOS J.; PLATT, JOHN P.; FOSSEN, HAAKON. Rheology, shear zone width, microstructural evolution and tectonics of a zippered strike-slip shear zone: The Senador Pompeu shear zone, northern Borborema Province, Brazil. JOURNAL OF STRUCTURAL GEOLOGY, v. 166, p. 23-pg., 2022-12-22. (19/10167-6, 17/21440-0, 16/22226-9)