Crustal Evolution Based on Petrochronology of Granulites and Granites Associated with Partial Melting of the Anápolis-Itauçu Complex of the Southern Brasília Orogen

• Grant number: 25/06678-6
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2025
• End date: August 31, 2028
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Regiane Andrade Fumes
• Grantee: Regiane Andrade Fumes
• Host Institution: Instituto de Geociências e Ciências Exatas (IGCE). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
• City of the host institution: Rio Claro
• Associated researchers: Bruno Vieira Ribeiro ; Caio Arthur Santos ; George Luiz Luvizotto ; George William Clemence Junior ; Mahyra Ferreira Tedeschi ; Pierre Lanari ; Rodrigo Irineu Cerri ; Rodrigo Prudente de Melo ; Valdecir de Assis Janasi
• Associated scholarship(s): 25/27141-0 - U-Th-PbT dating of monazite from the granulite of the Anápolis-Itauçu Complex and granites associated with partial melting, BP.IC; 25/22178-3 - C-axis thermometry of quartz in the granulites and metagranites of the Anápolis-Itauçu Complex in the Americano do Brasil region, Goiás, Brazil, BP.IC

Abstract

The Earth's continental crust preserves significant geological processes that have occurred throughout the planet's evolution. Among these processes, the generation of igneous rocks through partial melting is fundamental to the formation and evolution of the continental crust. This partial melting is often closely related to high-grade metamorphism. Therefore, this project aims to establish a link between high-grade metamorphism and the associated igneous rocks. To forge this connection, in-situ analytical techniques for petrochronological purposes (LA-ICP-MS, LA-ICP-MS/MS, LA-ICP-MS split stream and Electron Microprobe) combined with thermodynamic modeling will be applied. The project's objective is to characterize the conditions and ages of the metamorphic processes recorded in granulites and the generation of igneous rocks through partial melting of the granulites. To achieve this, igneous and metamorphic rocks from the Southern Brasília Orogen, of the Anápolis-Itauçu Complex in the Americano do Brazil region of Goiás, will be studied. The ages obtained from U-Pb-Hf in zircon, U-Pb in titanite and rutile, U-Th-PbTotal in monazite, and Lu-Hf in garnet will be correlated with the igneous and metamorphic processes through geochemical data recorded in the granulites and granites studied. (AU)