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Phase equilibrium studies bearing on genetic links between alkaline and subalkaline magmas, with special reference to the limestone assimilation hypothesis

Wyllie, Peter J. and Watkinson, David H. (1970) Phase equilibrium studies bearing on genetic links between alkaline and subalkaline magmas, with special reference to the limestone assimilation hypothesis. Canadian Mineralogist, 10 (3). pp. 362-374. ISSN 0008-4476. https://resolver.caltech.edu/CaltechAUTHORS:20160126-100216606

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Abstract

The limestone assimilation hypothesis for forming alkaline, magmas from subakaline magmas is based on circumstantial petrological evidence. It requires (1) desilication, (2) alkali transfer by CO_2 and H_2O. Experimental results indicate that limestone assimilation causes crystallization, and that the thermal barrier between granitic and feldspathoidal liquids persists in the presence of H_2O and CO_2 to high pressures. Desilication of SiO_2-oversaturated magmas remains an unlikely process. Results in silicate-salt-volatile systems suggest that alkali transfer is only effective from liquids already enriched in alkalis. In general, experimental studies have failed to validate proposed genetic links between alkaline and subalkaline magmas through assimilation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://canmin.geoscienceworld.org/content/10/3/362.shortPublisherArticle
Additional Information:© 1970 Mineralogical Association of Canada. We are grateful to the National Science Foundation for their continuing support of the experimental program in silicate-carbonate systems with Grants GA-1289 and GA-15718.
Funders:
Funding AgencyGrant Number
NSFGA-1289
NSFGA-15718
Issue or Number:3
Record Number:CaltechAUTHORS:20160126-100216606
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160126-100216606
Official Citation:Peter J. Wyllie and David H. Watkinson Phase equilibrium studies bearing on genetic links between alkaline and subalkaline magmas, with special reference to the limestone assimilation hypothesis Can Mineral, August 1970, v. 10, p. 362-374
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63969
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Jan 2016 18:24
Last Modified:03 Oct 2019 09:33

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