Artículo
Asbestiform and non-asbestiform morphologies in a talc and vermiculite mine from the province of Córdoba (Argentina): a case study
Lescano, Leticia; Locati, Francisco
; Sfragulla, Jorge Alberto; Marfil, Silvina Andrea; Bonalumi, Aldo Antonio; Maiza, Pedro Jose
Fecha de publicación:
09/2017
Editorial:
Springer
Revista:
Environmental Earth Sciences
ISSN:
1866-6280
e-ISSN:
1866-6299
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this work, a talc and vermiculite mine from the province of Córdoba (Argentina) was investigated with special emphasis on the occurrence of asbestiform and non-asbestiform phases. The meta-ultramafic rock was studied by a multimethodological approach, complementing field studies with petrographic-mineralogical, compositional and morphological analyses. Samples were examined by stereomicroscopy, polarizing light microscopy, SEM–EDS, XRD, DSC-TGA and FTIR. Complementary, compositional and textural analyses were performed with FE-SEM–EDS and EPMA. Talc-rich veins with a laminar and fibrous appearance were at first recognized. However, the fibrous morphology observed both in the field and by microscopy is due to an apparent habit because of the sample orientation. To avoid erroneous interpretations, studies by secondary electron images (SEM) are fundamental to carrying out this type of analysis. Tremolite was identified in different zones of the outcrop; however, only ~40% of the crystals located in the vermiculite zone have dimensions to be considered as asbestiform fibres in the range of respirable particles. In these types of complex deposits affected by superimposed metamorphic, igneous and deformational events, multimethodological approaches are necessary to develop models of occurrence of asbestiform morphologies that may be applicable to other with similar characteristics.
Palabras clave:
ARGENTINA
,
ASBESTOS
,
META-ULTRAMAFIC ROCK
,
TALC
,
TREMOLITE
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CICTERRA)
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Citación
Lescano, Leticia; Locati, Francisco; Sfragulla, Jorge Alberto; Marfil, Silvina Andrea; Bonalumi, Aldo Antonio; et al.; Asbestiform and non-asbestiform morphologies in a talc and vermiculite mine from the province of Córdoba (Argentina): a case study; Springer; Environmental Earth Sciences; 76; 18; 9-2017; 1-20
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