CO2 mineralization process in basalt rocks: study case, Serra Geral Formation, Paraná sedimentary Basin, São Paulo state

• Ano de defesa: 2024
• Autor(a) principal: Alzate Rubio, Valentina
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Basalt's petrography; Carbon capture and geological storage; Carbon mineralization; não disponível; Petrography; Whole rock geochemistry
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/44/44142/tde-06032024-074438/

The Serra Geral Formation basalts, prominent within the Paraná basin, are characterized by mineral content of Ca-plagioclase, Ca-clinopyroxene, and volcanic glass, which release Ca, Mg, and Fe cations during hydrolysis, facilitating carbonate formation within the rock\'s pores. This natural process is used in Carbon Capture and Storage to permanently remove carbon dioxide and store it within igneous reservoirs. Industries in São Paulo state contribute 25% of Brazil\'s greenhouse gas emissions, underscoring the importance of implementing CCS strategies. This study focuses on the Ribeirão Preto-Reginópolis region of São Paulo state, characterizing the mineralogical and geochemical composition of Serra Geral basalts using techniques like optical petrography, X-ray fluorescence and SEM. Results highlight favorable dimensions of basaltic flows for mineral trapping, dominated by simple pahoehoe and pounded pahoehoe facies, with significant Ca-plagioclase, Ca-clinopyroxene, and celadonite content. Despite geological variations, the basalt formations exhibit consistent mineralization potential in the experiments, emphasizing São Paulo state\'s suitability for CO2 injection and carbon mineralization projects. Therefore, these findings suggest promising prospects for utilizing basaltic flows in CCS initiatives, given their favorable geochemical and textural characteristics, including good concentrations of key cations and lithological textures conducive to carbon mineralization.