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Serpentinization of the Belvidere Mountain ultramafic body, Vermont; mass balance and reaction at the metasomatic front

Labotka, Theodore C. and Albee, Arden L. (1979) Serpentinization of the Belvidere Mountain ultramafic body, Vermont; mass balance and reaction at the metasomatic front. Canadian Mineralogist, 17 (4). pp. 831-845. ISSN 0008-4476. http://resolver.caltech.edu/CaltechAUTHORS:20131118-132153939

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Abstract

Chrysotile-asbestos veins that cut the relatively unaltered dunite core of the ultramafic body at Belvidere Mountain, Vermont, are bordered by symmetrical serpentinite zones composed of antigorite, magnetite and brucite. This serpentinite is separated from the dunite host by a sharp reaction front, and the modal mineralogy and mineral chemistry of the two rock-types adjacent to the front were determined in order to characterize the serpentinization reaction. A mass balance of bulk chemistry indicates that the serpentinite formed by the addition of SiO_2, and H_2O, loss of H_2, and without net loss of magnesium. A reaction that most closely represents the serpentinization front is: 100 olivine + 25 SiO_2 + 129 H_2O = 31 antigorite + 4 magnetite + 4 H_2. The presence of essentially monomineralic zones suggests that SiO_2, H_2O and H_2 activities were externally controlled. Local concentrations of brucite indicate that the activities of those components were locally appropriate for the stability of brucite.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://canmin.geoscienceworld.org/content/17/4.tocPublisherArticle
Additional Information:© 1979 Mineralogical Association of Canada. Received October 1978, revised manuscript accepted July 1979. The perceptive review by F.J. Wicks is greatly appreciated. Support was provided by National Science Foundation grant EAR 75-03416.
Funders:
Funding AgencyGrant Number
NSFEAR 75-03416
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences3165
Record Number:CaltechAUTHORS:20131118-132153939
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20131118-132153939
Official Citation: T. C. Labotka and A. L. Albee Serpentinization of the Belvidere Mountain ultramafic body, Vermont; mass balance and reaction at the metasomatic front Can Mineral 1979 17:831-845
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42529
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:18 Nov 2013 21:50
Last Modified:13 Feb 2019 18:05

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