The rate and temperature of reaction of CLF3 with silicate minerals, and their relevance to oxygen isotope analysis

Détails

ID Serval
serval:BIB_B1D69E5C5A06
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The rate and temperature of reaction of CLF3 with silicate minerals, and their relevance to oxygen isotope analysis
Périodique
Chemical Geology
Auteur(s)
Vennemann T.W., Smith H.S.
ISSN-L
0009-2541
Statut éditorial
Publié
Date de publication
1990
Peer-reviewed
Oui
Volume
86
Pages
83-88
Langue
anglais
Résumé
A variety of silicate-ClF3 reaction experiments have been performed in
order to determine the rate of reaction and minimum temperatures for
which there is complete liberation of oxygen. Fast reaction rates
(less-than-or-equal-to 2 hr.) and low minimum reaction temperatures
(approximately 450-degrees-C) are shown by minerals such as quartz,
feldspar, biotite and pyroxene while garnet reacts much slower and
requires higher temperatures (4-8 hr. and 600-degrees-C, respectively).
It is not possible to completely liberate oxygen from Mg-rich olivine
using ClF3. A comparison of delta-O-18-values obtained from incomplete
oxygen extractions to those for complete extractions indicates that a
minimum oxygen yield of 95% is required for accurate delta-O-18
determinations. These results indicate that ClF3 should not be used as
a reagent when attempting to liberate oxygen preferentially from one
mineral in a multi-mineral sample.
Création de la notice
29/09/2012 16:23
Dernière modification de la notice
20/08/2019 15:20
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