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Contribution of multivariate geochemical analysis and mineralogical study in the characterization of sediments: the Miocene-Pliocene boundary in the Sorbas Basin (SE Spain)

Published online by Cambridge University Press:  09 July 2018

A. Sanchez Bellon ,
Ch. Mosser ,
J. P. Moral Cardona ,
C. Roquin  and
E. Sebastian Pardo
A. Sanchez Bellon
Affiliation:
Dpto. de Cristalografía y Mineralogía de la Universidad de Cádiz, Aptdo N° 40, Facultad de Ciencias, 11510 Puerto Real, Spain
Ch. Mosser
Affiliation:
Centre de Géochimie de la Surface CNRS, 1 rue Blessig, F-67084 Strasbourg Cedex, France
J. P. Moral Cardona
Affiliation:
Dpto. de Cristalografía y Mineralogía de la Universidad de Cádiz, Aptdo N° 40, Facultad de Ciencias, 11510 Puerto Real, Spain
C. Roquin
Affiliation:
Centre de Géochimie de la Surface CNRS, 1 rue Blessig, F-67084 Strasbourg Cedex, France
E. Sebastian Pardo
Affiliation:
Dpto. de Mineralogía y Petrología de la Universidad de Granada, Avda. Fuentenueva s/n, Facultad de Ciencias, 18002 Granada, Spain
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Abstract

A mineralogical study and multivariant geochemical analysis have been carried out to determine the sedimentation processes and the influence of surrounding rocks on sediments. Analyses were made on the clay fraction of sediments and on bulk samples of rocks from nearby reliefs in the Sorbas Basin (SE Spain). Source rocks were identified by statistical analysis of trace elements and by comparison of the crystallographic parameters of phyllosilicates in sediments and supposed sources. Palaeoenvironmental conditions are recorded by specific elements in the clay minerals. The study of the B and Mg content and of the different types of smectites and palygorskite found in distinct areas has permitted a description of these conditions for this Basin. In this way, different types of deposition environment, showing varying degrees of confinement and influence from marine or continental water, have been distinguished.

Type
Research Article
Information
Clay Minerals , Volume 32 , Issue 4 , December 1997 , pp. 517 - 530
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1997

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