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Geochemistry of altered smectites

In basalts and volcanogenic sediments from the Indian Ocean, the successive stages of submarine alteration of volcanic rocks and glasses give rise to the incorporation or the relative increase of iron in smectite lattices. During the first stage, the Mg-smectites are the most abundant; they are occasionally associated with Al-smectites. Afterwards, they are gradually replaced by iron-rich smectites. The REE distribution follows the same trend as the mineralogical changes. During the f'trst stage of alteration, REE distribution in clay minerals is the same as in the fresh glasses but, when the iron-rich smectites increase, the Ce has a specific behaviour. The Ce shows a positive anomaly in iron-rich smectites formed early in palagonitized glasses, and a negative one in authigenic smectites formed later from solutions in equilibrium with seawater.

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Cite this as

Desprairies, Alain, Bonnot-Courtois, Chantal (1980). Dataset: Geochemistry of altered smectites. https://doi.org/10.1594/PANGAEA.714972

DOI retrieved: 1980

Additional Info

Field Value
Imported on November 29, 2024
Last update November 29, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.714972
Author Desprairies, Alain
Given Name Alain
Family Name Desprairies
More Authors
Bonnot-Courtois, Chantal
Source Creation 1980
Publication Year 1980
Resource Type application/zip - filename: Desprairies_Bonnot-Courtois_1980
Subject Areas
Name: Geophysics

Related Identifiers
Title: Relation entre la composition des smectites d'alteration sous-marine et leur cortege de terres rares
Identifier: https://doi.org/10.1016/0012-821X(80)90175-2
Type: DOI
Relation: IsSupplementTo
Year: 1980
Source: Earth and Planetary Science Letters
Authors: Desprairies Alain , Bonnot-Courtois Chantal .