Estudio de pastas cerámicas del centro-oeste argentino (Mendoza, Argentina): microscopía óptica y QEMSCAN
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2019-09-24
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Pontificia Universidad Católica del Perú. Fondo Editorial
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En este trabajo se integran resultados de dos técnicas analíticas utilizadas para el estudio de pastas cerámicas: microscopio petrográfico y Quantitative Evaluation of Minerals by Scaning Electron Microscopy (QEMSCAN), el cual se presenta como una innovación para el estudio de pastas. El objetivo consistió en explorar el potencial de complementariedad entre ambas técnicas. Para ello, se aplicaron análisis de QEMSCAN a muestras de material cerámico arqueológico provenientes del Noroeste de la provincia de Mendoza, en el Centro Oeste Argentino, que fueron estudiadas previamente en microscopio de polarización óptica. La información obtenida mediante QEMSCAN resultó coherente con los resultados del análisis por microscopio de polarización y permitió profundizar las observaciones realizadas a partir de los estudios petrográficos. Los análisis de QEMSCAN detectaron minerales de tamaños muy finos que componen la arcilla, cuya identificación presenta dificultades en el microscopio petrográfico, mientras que los estudios petrográficos permitieron interpretar los resultados obtenidos por el análisis automatizado. La aplicación conjunta de ambos análisis permitió caracterizar y discriminar pastas de procedencia diversa y vincular su composición con marcos geológicos locales y extraregionales. Consideramos que los análisis realizados mediante microscopio de polarización y QEMSCAN, brindan información complementaria, y su aplicación combinada guarda potencial para estudiar proveniencia de materiales cerámicos y manufactura de pastas.
In this work, results of two analytical techniques used for the study of ceramic pastes are integrated: thin section petrography and Quantitative Evaluation of Minerals by Scaning Electron Microscopy (QEMSCAN), which is presented as an innovation for the study of pastes. The aim was to explore the potential of complementarity between both techniques. QEMSCAN analysis was applied to samples of archaeological ceramic material from northwestern Mendoza, Argentina, which were previously studied in an optical polarization microscope. The information obtained by QEMSCAN analysis was consistent with the results of the petrographic analysis, and made it possible to deepen the results of the petrographic studies. Petrographic analysis was necessary to interpret the results obtained by the application of automated QEMSCAN analysis. While the QEMSCAN analysis detected minerals of very fine sizes that make up the clay, whose identification is difficult in the petrographic microscope. The application of both analyses made possible the characterization and differentiation of ceramic pastes of different origin and to link their composition with local and extra-regional geology. We consider that the QEMSCAN and petrographic analysis provide complementary information, and its combined application is important to study the origin of ceramic materials and the manufacture of archaeological ceramics.
In this work, results of two analytical techniques used for the study of ceramic pastes are integrated: thin section petrography and Quantitative Evaluation of Minerals by Scaning Electron Microscopy (QEMSCAN), which is presented as an innovation for the study of pastes. The aim was to explore the potential of complementarity between both techniques. QEMSCAN analysis was applied to samples of archaeological ceramic material from northwestern Mendoza, Argentina, which were previously studied in an optical polarization microscope. The information obtained by QEMSCAN analysis was consistent with the results of the petrographic analysis, and made it possible to deepen the results of the petrographic studies. Petrographic analysis was necessary to interpret the results obtained by the application of automated QEMSCAN analysis. While the QEMSCAN analysis detected minerals of very fine sizes that make up the clay, whose identification is difficult in the petrographic microscope. The application of both analyses made possible the characterization and differentiation of ceramic pastes of different origin and to link their composition with local and extra-regional geology. We consider that the QEMSCAN and petrographic analysis provide complementary information, and its combined application is important to study the origin of ceramic materials and the manufacture of archaeological ceramics.
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QEMSCAN, Análisis petrográfico, Cerámica arqueológica, Mendoza, Argentina
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