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Mineralogical, chemical and morphological features of salt accumulations in the Flumen-Monegros district, NE Spain

AutorVizcayno, Carmen; García-González, M.T. ; Gutiérrez, M. ; Rodríguez, R.
Palabras claveMineralogical
Salt accumulations
Flumen-Monegros (NE Spain)
Fecha de publicación1995
CitaciónGeoderma 68(3): 193-210 (1995)
ResumenRelationships among the mineralogy, morphology and the formation processes of salt accumulations were studied in three sampling areas in the Flumen-Monegros district, which represent three geochemical environments [Na-SO4-CI, Na-(Mg)-SO4-C1 and Na-CO3-SO4-C1], according to chemical and mineralogical results. The samples included both natural ones and others that were obtained in the laboratory by the crystallization of brines with and without substrate. A climatic chamber was used to reproduce the environmental conditions. Laboratory crystallization of brines without soil substrate does not always reproduce the natural mineral associations. Such associations were reproduced, however, when the crystallization was carried out with the epipedon. New morphologies are described for bloedite (radiating prismatic, and foliated rosette-like) and burkeite ( book plates and spheroidal association of plates), the latter formed through capillary evaporation. X-ray diffraction, scanning electron microscopy (SE and BSE modes), energy dispersive X-ray spectrometry and polarized light microscopy were some of the techniques used, supplemented by chemical data.
Descripción18 pages, figures, and tables statistics.
Versión del editorhttp://dx.doi.org/10.1016/0016-7061(95)00032-J
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