Geotermobarometria de safirina e granada granulito do afloramento da Praia da Paciência, Salvador, Bahia – Cinturão Salvador-Esplanada-Boquim

Researchers have identified ultra-high-temperature metamorphism conditions in the Historic Centre of Salvador de Bahia, marking the first such discovery in the Salvador-Esplanada-Boquim Belt. The study analyzed garnet granulite and sapphirine granulite from the Praia da Paciência outcrop, revealing peak metamorphic conditions of approximately 1.04 GPa and 1,015°C for garnet granulite, with sapphirine granulite indicating stability up to ~1,030°C. These findings suggest a post-peak metamorphism trajectory involving near-isothermal decompression, providing insights into the geological history of the region. The research utilized geothermobarometry and pseudosection analysis to characterize mineral compositions and phase relationships, contributing new understanding to the tectonic evolution of the Cráton do São Francisco.

Rodrigues, D. L., Oliveira, J. S. d. S. d., & Moraes, R. d. (2020). Geotermobarometria de safirina e granada granulito do afloramento da Praia da Paciência, Salvador, Bahia – Cinturão Salvador-Esplanada-Boquim. Geologia USP. Série Científica, 20(4), 53–78. https://doi.org/10.11606/issn.2316-9095.v20-171026