Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina

In the Mesopotamia region (Argentina) basalts are exploited as aggregates for different applications. Depending on the alteration they have undergone, their properties can be affected, especially if the rocks are altered to swelling clay minerals. The objective of this work is to contribute to under...

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Autores principales:	Locati, F., Collo, G., Madsen, L., Muñoz, M., Marfil, S., Maiza, P.
Formato:	Artículo
Lenguaje:	Español
Publicado:	Elsevier Ltd 2022
Materias:	Q Ciencia (General) QD Química
Acceso en línea:	http://pa.bibdigital.ucc.edu.ar/3301/1/A_Locati_Collo_Madsen.pdf
Aporte de:	Producción Académica Universidad Católica de Córdoba (UCCor) de Universidad Católica de Córdoba

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record_format	dspace
spelling	I38-R144-33012025-04-10T21:37:50Z http://pa.bibdigital.ucc.edu.ar/3301/ Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina Locati, F. Collo, G. Madsen, L. Muñoz, M. Marfil, S. Maiza, P. Q Ciencia (General) QD Química In the Mesopotamia region (Argentina) basalts are exploited as aggregates for different applications. Depending on the alteration they have undergone, their properties can be affected, especially if the rocks are altered to swelling clay minerals. The objective of this work is to contribute to understanding the local alteration process of basalts from the province of Corrientes and propose an alteration sequence. Mineralogical-chemical and textural studies were performed on the rocks by stereomicroscopy, polarizing microscopy, μ-XANES, SEM-EDS, and EPMA. In addition, X-ray diffraction, FTIR, DSC-TGA, cation exchange capacity, and exchangeable cations were determined on the material extracted from the cavities. According to the results obtained, secondary products would have formed by the interaction of the rock and hydrothermal fluids at temperatures likely < ∼100 °C–150 °C. Different alteration stages were determined (Stage 1 to 5), recognizing swelling clay minerals (saponite, Al-saponite, Fe-beidellite, beidellite-montmorillonite) +/− Fe-oxyhydroxides, calcite and, microcrystalline and cryptocrystalline silica as the main alteration phases. Pyroxene and plagioclase would have acted as the main source for the formation of clay minerals, while intercrystalline K-feldspar remains unaltered. Elsevier Ltd 2022-06 info:eu-repo/semantics/article info:eu-repo/semantics/closedAccess application/pdf spa http://pa.bibdigital.ucc.edu.ar/3301/1/A_Locati_Collo_Madsen.pdf Locati, F. ORCID: https://orcid.org/0000-0001-9067-1497 <https://orcid.org/0000-0001-9067-1497>, Collo, G., Madsen, L., Muñoz, M., Marfil, S. and Maiza, P. (2022) Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina. Journal of South American Earth Sciences, 116. ISSN 0895-9811 https://linkinghub.elsevier.com/retrieve/pii/S0895981122000682 info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.jsames.2022.103777
institution	Universidad Católica de Córdoba
institution_str	I-38
repository_str	R-144
collection	Producción Académica Universidad Católica de Córdoba (UCCor)
language	Español
orig_language_str_mv	spa
topic	Q Ciencia (General) QD Química
spellingShingle	Q Ciencia (General) QD Química Locati, F. Collo, G. Madsen, L. Muñoz, M. Marfil, S. Maiza, P. Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina
topic_facet	Q Ciencia (General) QD Química
description	In the Mesopotamia region (Argentina) basalts are exploited as aggregates for different applications. Depending on the alteration they have undergone, their properties can be affected, especially if the rocks are altered to swelling clay minerals. The objective of this work is to contribute to understanding the local alteration process of basalts from the province of Corrientes and propose an alteration sequence. Mineralogical-chemical and textural studies were performed on the rocks by stereomicroscopy, polarizing microscopy, μ-XANES, SEM-EDS, and EPMA. In addition, X-ray diffraction, FTIR, DSC-TGA, cation exchange capacity, and exchangeable cations were determined on the material extracted from the cavities. According to the results obtained, secondary products would have formed by the interaction of the rock and hydrothermal fluids at temperatures likely < ∼100 °C–150 °C. Different alteration stages were determined (Stage 1 to 5), recognizing swelling clay minerals (saponite, Al-saponite, Fe-beidellite, beidellite-montmorillonite) +/− Fe-oxyhydroxides, calcite and, microcrystalline and cryptocrystalline silica as the main alteration phases. Pyroxene and plagioclase would have acted as the main source for the formation of clay minerals, while intercrystalline K-feldspar remains unaltered.
format	Artículo
author	Locati, F. Collo, G. Madsen, L. Muñoz, M. Marfil, S. Maiza, P.
author_facet	Locati, F. Collo, G. Madsen, L. Muñoz, M. Marfil, S. Maiza, P.
author_sort	Locati, F.
title	Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina
title_short	Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina
title_full	Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina
title_fullStr	Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina
title_full_unstemmed	Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina
title_sort	clay mineral assemblages as the key to understanding alteration processes in basalts from the province of corrientes, argentina
publisher	Elsevier Ltd
publishDate	2022
url	http://pa.bibdigital.ucc.edu.ar/3301/1/A_Locati_Collo_Madsen.pdf
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Clay mineral assemblages as the key to understanding alteration processes in basalts from the province of Corrientes, Argentina

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