Petrochronology and tectonic evolution of the Southern Borborema Orogen during the Neoproterozoic in NE Brazil

• Grant number: 21/06106-1
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: October 01, 2021
• End date: July 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Miguel Angelo Stipp Basei
• Grantee: Lucas Ramos Tesser
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 24/01358-0 - Deciphering metamorphic timescales in a Neoproterozoic continental collision zone using coupled petrochronology and geospeedometry., BE.EP.DR

Abstract

Inverted Barrovian metamorphic sequences are reported to be one of the major consequences of syn-metamorphic ductile thrust systems in continental collision zones. Located in northeastern Brazil, the South Borborema Orogen is a well-preserved example of an ancient continental collision zone formed after the closure of the restricted Sergipano Ocean and the consequent agglutination of the Congo-Sao Francisco paleocontinent and the Borborema-Benino-Nigerian block at c. 600 Ma ago. Ductile thrust systems outline an inverted Barrovian-type metamorphic sequence analogous to modern collisional orogens, varying from greenschist facies in the bottom to upper amphibolite/granulite transition at the top towards the metamorphic-anatectic core. This project aims to investigate the duration, conditions, and rates of tectonic processes related to metamorphic inversion during the South Borborema Orogeny in the Neoproterozoic. A campaign-style 4D pressure-temperature-time-deformation investigation is proposed here, using zircon, monazite, and titanite Th-U-Pb petrochronology (LA-ICP-MS), thermodynamic modeling and in situ trace element mapping (LA-ICP-TOFMS) on profiles transverse to the thermal structure of the orogen. This integrated approach has the potential to elucidate the mechanisms that drove the inversion of regional Barrovian metamorphism, as well as to assess possible heat sources, rates, and duration of orogeny from an archetype collisional orogen formed after the closure of the restricted Sergipano ocean in the center of West Gondwana. (AU)

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

QUEIROZ, LORENA DE TOLEDO; ROCHA, BRENDA CHUNG; RIBEIRO, BRUNO VIEIRA; CIOFFI, CAUE RODRIGUES; MEIRA, VINICIUS TIEPPO; TESSER, LUCAS RAMOS; DE OLIVEIRA, ARMANDO LUCAS SOUZA; COSTA, GYOVANA PATRICIA GONSALVES; LUVIZOTTO, GEORGE LUIZ. Metamorphic timescales of Neoproterozoic high-pressure granulites constrained by multi-mineral petrochronology: A case study from the Southern Brasilia Orogen (SE Brazil). Precambrian Research, v. 430, p. 20-pg., 2025-10-09. (21/09437-9, 23/06385-3, 23/17836-6, 22/14877-0, 21/00967-5, 21/06106-1, 22/07116-3, 23/08262-6)

HUECK, MATHIAS; BASEI, MIGUEL A. S.; FRIMMEL, HARTWIG; LINO, LUCAS M.; CORRE, VINICIUS X.; TESSER, LUCAS R.; NETO, MARIO C. CAMPOS; GANADE, CARLOS E.. Pan-African granitic magmatism of the Kaoko Belt: Tectonic perspective from its South American connection and insights into the crustal architecture of SW Gondwana. Precambrian Research, v. 405, p. 22-pg., 2024-03-16. (19/06838-2, 23/06771-0, 21/06106-1, 05/58688-1, 15/03737-0)