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Electron Microscopy and X-Ray Analysis of Lacustrine Clays from the Charo Canyon, State of Michoacán, Mexico

Published online by Cambridge University Press:  28 February 2024

G. Carbajal de la Torre ,
I. Israde Alcántara ,
J. Serrato Rodríguez  and
J. Reyes-Gasga
G. Carbajal de la Torre
Affiliation:
Instituto de Investigaciones Metalúrgicas U.M.S.N.H., Apdo. Postal 52 B, C.P. 58000 Morelia, Michoacán, Mexico
I. Israde Alcántara
Affiliation:
Instituto de Investigaciones Metalúrgicas U.M.S.N.H., Apdo. Postal 52 B, C.P. 58000 Morelia, Michoacán, Mexico
J. Serrato Rodríguez
Affiliation:
Instituto de Investigaciones Metalúrgicas U.M.S.N.H., Apdo. Postal 52 B, C.P. 58000 Morelia, Michoacán, Mexico
J. Reyes-Gasga
Affiliation:
Instituto de Física, UNAM, Apdo. Postal 20-364, 01000, México, D.F., Mexico
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Abstract

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In this paper we analyzed by electron microscopy and X-ray diffraction (XRD) the exposed lacustrine clay in a stratigraphic column at Charo Canyon, State of Michoacán, Mexico. Smectite, cris-tobalite, albite and quartz are the main mineral species in the sediments. Smectite is the most abundant and has a nanometric twinned small particle habit. The low crystallinity of the smectite detected in some of the samples seems to be associated with instability of the paleohydrological regime in which clayey material was deposited. Iron from underlying volcanic ash is apparently responsible for the iron concentration detected in the smectite structure.

Keywords

ClaysElectron MicroscopyGeologyX-Ray Analysis
Type
Research Article
Information
Clays and Clay Minerals , Volume 46 , Issue 3 , June 1998 , pp. 330 - 339
Copyright
Copyright © 1998, The Clay Minerals Society

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