Petrochronoogy applied to the study of the tectono-metamorphic context of rocks from the Turvo-Cajati Formation, Curitiba Domain, and its role in the evolution of Ribeira Belt, Cajati, SP

• Grant number: 18/01572-1
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2019
• End date: March 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Renato de Moraes
• Grantee: Bruna da Silva Ricardo
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 19/19651-8 - Using petrochronology to understand the tectonometamorphic evolution of the Curitiba Domain, Ribeira Belt, SE Brazil, BE.EP.MS

Abstract

In the Ribeira Belt, between the States of São Paulo and Paraná, Brazil, metasedimentary rocks from Turvo-Cajati Formation crop out. There are some recent studies that point to distinct metamorphic field gradients in the same unit. The baric regime in partially molten granulite facies rocks indicates pressure above 9 kbar (Faleiros, 2008), whereas amphibolite facies rocks record a barrovian-type metamorphism with pressure around 6 kbar (Ricardo, 2017). Both rocks are assigned to the Turvo-Cajati Formation, although the relationship between these two lithotectonic sub-units is not well defined. The present study aims to detail the barrovian metamorphism described by Ricardo, 2017, to refine the isograds mapped by the author and to establish the temperature and pressure conditions of the metamorphism that affect those rocks. Furthermore, the study intends to use petrochronology to obtain metamorphic events' age in monazite grains and compare them to the available data in the literature of the rocks studied by Faleiros, 2008 that points to metamorphic age of 589 ± 12 Ma and 584 ± 4 Ma (Faleiros et al., 2011; Faleiros et al., 2016). With this, the project will seek for a wide sight about these sub-units and their tectono-metamorphic evolution in the context of the Turvo-Cajati Formation metamorphism, its meaning within the Curitiba Domain and, consequently, inside the Ribeira Belt. (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)

RICARDO, BRUNA S.; FALEIROS, FREDERICO M.; DE MORAES, RENATO; SIGA JUNIOR, JR., OSWALDO; CAMPANHA, GINALDO A. C.. Tectonic implications of juxtaposed high- and low-pressure metamorphic field gradient rocks in the Turvo-Cajati Formation, Curitiba Terrane, Ribeira Belt, Brazil. Precambrian Research, v. 345, AUG 2020. (18/01572-1, 15/04487-7, 18/10012-0, 16/12986-6)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

RICARDO, Bruna da Silva. Petrochronology applied into evaluating the tectono-metamorphic context from rocks of the Turvo-Cajati Formation, Curitiba Terrane, and its influence in the Ribeira Belt Evolution, Cajati, SP. 2021. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Geociências (IG/BT) São Paulo.