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Environmental impacts produced through magma-sediment interactions in the Paraná-Etendeka Magmatic Province

Grant number: 18/19713-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2018
Effective date (End): October 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal Investigator:Adriana Alves
Grantee:Melina Cristina Borges Esteves
Home Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Brazil hosts most of one of the world's most expressive Continental Flood Basalts (CFB) associated to the breakup of the Gondwana Supercontinent and the opening of the Atlantic Ocean in the Early Cretaceous, the Paraná-Etendeka Magmatic Province (PMP). PMP spreads across a large portion of south-central of South America, covering the entire southern central area of Brazil in the so-called Paraná Basin. In this huge area of volcanic cover, predominate tholeiitic basalts in the form of dikes and sills and acid and intermediate rocks in smaller quantity.The extrusion of lavas in the form of volcanoes has long frightened and dazzled the human race and understanding how the Earth system works is of paramount importance. Although they represent temporary conditions, volcanic eruptions have vast potential to promote significant climate and ecosystem perturbation in short timescales and this is what makes the studying of CFB so relevant. In this context, this project aims to evaluate products of the interaction between the magmatism of the Paraná-Etendeka Magmatic Province with the sediments of the Paraná Basin with focus on the evaluation of the possible associated environmental disturbances throught fluid inclusions microthermometric, spectroscopic and spectrometric techniques. The analyzes will be performed in fluid inclusions trapped within quartz and carbonate hydrothermal veins (i) in the sandstones of the Itararé Group that were affected by diabase sills of the PMP in the surroundings of Limeira-SP; (ii) high temperature fluid inclusions selected from the sample inventory of the project PFRH-241 (Programa de Formação de Recursos Humanos em Geologia do Petróleo e Meio Ambiente), concerning hydrothermal veins associated to thermogenic oil formation within the organic matter- rich sediments of the Paraná Basin; (iii) in the sediments of the Teresina Formation in the northern flank of the Ponta Grossa dyke swarm, near from Taguaí-SP, where the sediments stands out as a pathway for hydrocarbon migration from the Irati-Pirambóia Petroleum System. This study proposal is linked to the project Serrapilheira (Projeto G-1709-21397 - Placing Quantitative Constraints on the Potential Environmental Impacts Associated to the Paraná-Etendeka Magmatism) and is justified by the great potential of the PMP in the generation of large-scale events and by the few studies relating to fluid inclusions, being the detailed study of the interaction magma-sediments essential in the most complete understanding of magmatism and its possible impacts. (AU)