HRTEM study of the chloritization of micas in the talc-chlorite deposit at Trimouns (Pyrenees, France)

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doi: 10.1127/ejm/6/1/0123
Authors:De Parseval, Philippe; Amouric, Marc; Baronnet, Alain; Fortune, Jean-Pol; Moine, Bernard; Ferret, Jocelyne
Author Affiliations:Primary:
URA Laboratoire de Minéralogie et Cristallographie, Toulouse, France
CRMC2, France
S.A. Talc de Luzenac, France
Volume Title:European Journal of Mineralogy
Source:European Journal of Mineralogy, 6(1), p.123-132. Publisher: Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), Stuttgart, Federal Republic of Germany. ISSN: 0935-1221
Publication Date:1994
Note:In English. 14 refs.; 1 table
Summary:In four rock samples from metasomatically altered pegmatite in the Trimouns deposit, two-coexisting types of mica chloritization can be distinguished: dissolution-recrystallization for muscovites and phlogopites and 'solid-state' transformation for other phlogopites. The latter occurs according to the two transformation mechanisms usually described in chloritization phenomena. Microanalyses reveal the presence of K, probably associated with the 'brucite-like' layer, in those chlorites resulting directly from the transformation of micas. Little or none of this K is found in later-formed chlorites constituting the talc-chlorite ore, it is therefore considered as a probable geochemical tracer of older micas. [R.A.H.]
Subjects:Chlorite; Chlorite group; Mica group; Muscovite; Phase equilibria; Phlogopite; Sheet silicates; Silicates; Talc; TEM data; Transformations; Europe; France; Pyrenees; Western Europe; Trimouns Deposit
Abstract Numbers:94M/3486
Record ID:1994025441
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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