Silva, R. J.Morais, IgorGomes, Elsa2023-07-282023-07-282023-07Silva, R. J.; Morais, Igor; Gomes, Elsa (2023) - Petrografia de litologias ferro-manganesíferas associadas ao Complexo Vulcano-Sedimentar (CVS), Faixa Piritosa Ibérica, Aljustrel. In: Lopes, F. C., Dinis, P. A., Duarte, L. V. e Cunha, P. P. (Coords.). XI Congresso Nacional de Geologia: Geociências e Desafios Globais. Livro de Resumos. Coimbra, 16- 20 julho de 2023, Departamento de Ciências da Terra da Universidade de Coimbra (eds.), p. 37-38. ISBN: 978-989-98914-8-7978-989-98914-8-7http://hdl.handle.net/10400.9/4081Resumo alargadoSUMMARY: The Iberian Pyrite Belt (IPB) is one of the largest metallogenic provinces of Volcanogenic Massive Sulfide (VMS) deposits in the world. On top of the massive sulfide mineralizations, exhalite levels are usually formed by jasper, chert and carbonates, related to Fe-Mn-Ba mineralizations. The structure of Maralhas, at the Aljustrel VMS deposit, was studied and the following mineral phases were identified: magnetite, hematite, goethite, pyrolusite and psilomelane. Chemical analyses were performed to complement and validate the mineralogy identified by optical microscopy inspection.porMaralhas structureFe-Mn oresPyrolusiteIberian Pyrite BeltEstrutura de MaralhasMineralizações Fe-MnPirolusiteFaixa Piritosa IbéricaAljustrel (Portugal)conference object