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(Article of periodic en Français - 1978)

Document title

Genèse de smectites ferrifères par altération deutérique de la base de coulées volcaniques du Massif Central français

Authors(s) and Affiliation(s)

MELIERES F. ; PERSON A. ;

Abstract

Detailed mineralogic investigations (XRD, SEM, DTA) were carried out on infra lava flow clay beds, from three sites in the French Massif Central. The mineralogy and the micromorphology of the clay material which is dominated by authigenic dioctaedral iron bearing smectites, allow us to propose a model involving rapid deuteric alteration of the volcanic material in a wet environment. A natural autoclave effect is thought to occur when the lava flows onto a substratum charged with water. Such a mechanism may explain the partitioning of the major geochemical constituents of the volcanic material within the authigenic mineral structures observed.

Source

Article of periodic

published at : Revue de géographie physique et de géologie dynamique Paris

Editor :

Millesime : 1978, vol. 20, no5 [pp. 389-398]

Bibliographic references : 14 réf

Language

Français

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