Swelling capacity of mixed talc-like/stevensite layers in white/green clay infillings (“deweylite”/ “garnierite”) from serpentine veins of faulted peridotites, New Caledonia - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The American Mineralogist Année : 2020

Swelling capacity of mixed talc-like/stevensite layers in white/green clay infillings (“deweylite”/ “garnierite”) from serpentine veins of faulted peridotites, New Caledonia

Résumé

White (Mg-rich) and green (Ni-rich) clay infillings ('deweylite'/'garnierite') found in serpentine veins of faulted peridotite formations from New Caledonia consist of an intimate mixture of fine-grained and poorly ordered 1:1 and 2:1 layer silicates, commonly referred to as non-expandable serpentine-like (SL) and talc-like (TL) minerals. New data on the swelling and shrinking capacity of these layer silicates were gathered from X-ray diffraction (XRD) after saturation of the clay fractions with different cations (Ca 2+ , Li + , K +), ethylene glycol (EG) solvation, and heating treatments. Simultaneously, layer charge distribution and vacancy density respectively were investigated by FTIR spectroscopy on NH4-saturated clay fractions
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hal-03000826 , version 1 (03-12-2020)

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Lionel Fonteneau, Laurent Caner, Sabine Petit, Farid Juillot, Florian Ploquin, et al.. Swelling capacity of mixed talc-like/stevensite layers in white/green clay infillings (“deweylite”/ “garnierite”) from serpentine veins of faulted peridotites, New Caledonia. The American Mineralogist, 2020, 105 (10), pp.1536-1546. ⟨10.2138/am-2020-6984⟩. ⟨hal-03000826⟩
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