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Petrology of the mafic volcanism in the Volta Redonda Basin

Grant number: 23/14914-6
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2023
Effective date (End): October 31, 2024
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal Investigator:Valdecir de Assis Janasi
Grantee:João Menezes Lima
Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:19/22084-8 - The Paraná Magmatic Province: petrogenesis, chronology and environmental impact of Cretaceous tholeiitic, alkaline and silicic magmatism in the Brazilian Platform, AP.TEM

Abstract

The Itaboraí and Volta Redonda sedimentary basins are the only ones in the context of the Continental Rift of Southeastern Brazil that present associated volcanism. In the Volta Redonda Basin, the volcanic manifestations are basanites that occur in the western sector of the Casa de Pedra Graben and were dated at 47.6 ± 0.7 Ma. This project proposes to investigate in greater detail the petrology of new finds of volcanic rocks mafic rocks in the Volta Redonda Basin and compare them with alkaline mafic rocks that occur as lamprophyre dikes in neighboring areas, relating them to the tectonic context of southeastern Brazil.

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