Geochronological and thermochronological constraints on the high grade rocks related to the neoproterozoic orogenesis in the vicinities of the Transbrasiliano-Kandi Lineament (NE-Brazil - NW Africa)

• Grant number: 12/00071-2
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2012
• End date: September 30, 2014
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Umberto Giuseppe Cordani
• Grantee: Umberto Giuseppe Cordani
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated researchers: Carlos Eduardo Ganade de Araujo ; Miguel Angelo Stipp Basei

Abstract

This research involves the study of the Neoproterozoic evolution of some important geotectonic elements along the Transbrasiliano-Kandi Lineament in NE Brazil and NW Africa. Among these elements are the high grade rocks formed in the Neoproterozoic collisional front and the magmatic rocks of the granitic-migmatitic Tamboril-Santa Quitéria Complex, formed in the associated convergent zone. Robust geochronological studies, such as U-Pb SHRIMP and LA-ICP-MS on zircon, for the determination of precise ages of the igneous and metamorphic events, and 40Ar/39Ar thermochronological studies on minerals with distinct isotopic closure temperatures, will be carried on, in order to obtain a better scenario for the tectonic evolution of the rocks involved in Neoproterozoic collision. The main objectives of this work are: 1) determination of metamorphic ages, including the age of eclogitic metamorphism in the Ceará Central Domain and its equivalents in Africa, as well as the age of regional cooling during exhumation; 2) dating of the Tamboril-Santa Quitéria Complex, based on U-Pb in situ analyses in zircons to check its relation with the regional metamorphism; 3) interpretation of the tectonic environment and evolution of the Neoproterozoic chain, within the final dynamic process of formation of West Gondwana. (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)

GANADE DE ARAUJO, CARLOS E.; CORDANI, UMBERTO G.; WEINBERG, ROBERTO F.; BASEI, MIGUEL A. S.; ARMSTRONG, RICHARD; SATO, KEI. Tracing Neoproterozoic subduction in the Borborema Province (NE-Brazil): Clues from U-Pb geochronology and Sr-Nd-Hf-O isotopes on granitoids and migmatites. LITHOS, v. 202, p. 167-189, AUG 2014. (12/00071-2)

GANADE DE ARAUJO, CARLOS E.; WEINBERG, ROBERTO F.; CORDANI, UMBERTO G.. Extruding the Borborema Province (NE-Brazil): a two-stage Neoproterozoic collision process. TERRA NOVA, v. 26, n. 2, p. 157-168, APR 2014. (12/00071-2, 05/58688-1)

GANADE DE ARAUJO, CARLOS E.; RUBATTO, DANIELA; HERMANN, JOERG; CORDANI, UMBERTO G.; CABY, RENAUD; BASEI, MIGUEL A. S.. Ediacaran 2,500-km-long synchronous deep continental subduction in the West Gondwana Orogen. NATURE COMMUNICATIONS, v. 5, OCT 2014. (12/00071-2)

GANADE, CARLOS E.; CORDANI, UMBERTO G.; AGBOSSOUMOUNDE, YAO; CABY, RENAUD; BASEI, MIGUEL A. S.; WEINBERG, ROBERTO F.; SATO, KEI. Tightening-up NE Brazil and NW Africa connections: New U-Pb/Lu-Hf zircon data of a complete plate tectonic cycle in the Dahomey belt of the West Gondwana Orogen in Togo and Benin. Precambrian Research, v. 276, p. 24-42, MAY 2016. (12/00071-2)