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Plagioclase zonation; an archive of trapped liquid and crustal contamination

Stearns A. Morse, Jon P. Davidson and Frank J. Tepley
Plagioclase zonation; an archive of trapped liquid and crustal contamination (in Layered intrusions, Brian O'Driscoll (editor) and Jill A. Vantongeren (editor))
Elements (December 2017) 13 (6): 403-408

Abstract

Many cumulates in layered intrusions contain plagioclase crystals that are compositionally zoned in terms of their major elements, and, less commonly, in their (super 87) Sr/ (super 86) Sr isotopic ratios. Major-element zoning in plagioclase is best explained by trapped liquid in the pore spaces between cumulus crystals, which is a result of the complex interplay between the rate of crystal growth and the cooling rate. Isotopic zoning in feldspars likely reflects crystal growth in a magma that is becoming, or has become, isotopically contaminated through wall rock partial melting and assimilation processes. Mineral-scale isotopic zoning, such as detected in plagioclase, can be used to infer the cooling rates of layered intrusions.


ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 13
Serial Issue: 6
Title: Plagioclase zonation; an archive of trapped liquid and crustal contamination
Title: Layered intrusions
Author(s): Morse, Stearns A.Davidson, Jon P.Tepley, Frank J.
Author(s): O'Driscoll, Brianeditor
Author(s): Vantongeren, Jill A.editor
Affiliation: University of Massachusetts at Amherst, Department of Geosciences, Amherst, MA, United States
Affiliation: University of Manchester, School of Earth and ENvironmental Sciences, Manchester, United Kingdom
Pages: 403-408
Published: 201712
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 27
Accession Number: 2018-025818
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols.
N57°06'00" - N57°06'00", W61°22'00" - W61°22'00"
N68°04'60" - N68°15'00", W31°45'00" - W31°34'60"
Secondary Affiliation: University of Durham, GBR, United KingdomOregon State University, USA, United States
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2018
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