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Diffusive Isotopic Contamination of Mafic Magma by Coexisting Silicic Liquid in the Muskox Intrusion

Stewart, Brian W. and DePaolo, Donald J. (1992) Diffusive Isotopic Contamination of Mafic Magma by Coexisting Silicic Liquid in the Muskox Intrusion. Science, 255 (5045). pp. 708-711. ISSN 0036-8075. doi:10.1126/science.255.5045.708. https://resolver.caltech.edu/CaltechAUTHORS:20150123-110745772

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Abstract

Shifts in ^(87)Sr/^(86)Sr and ^(143)Nd/^(144)Nd ratios measured in cumulates from the upper levels of the Muskox mafic intrusion indicate that isotopic and bulk chemical exchange were decoupled across a mafic-silicic liquid interface during crystallization of the intrusion. Modeling of diffusive exchange between liquid layers demonstrates that isotopic compositions of silicate liquids in layered magma chambers may be strongly affected by this process on time scales of 10^3 to 10^4 years. Diffusive contamination can be used to place constraints on the physical processes and time scales of magmatic systems.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.255.5045.708DOIArticle
http://www.sciencemag.org/content/255/5045/708PublisherArticle
http://www.jstor.org/stable/2876445JSTORArticle
Additional Information:© 1992 American Association for the Advancement of Science. 11 October 1991; Accepted 2 December 1991. We thank T. N. Irvine for samples and field assistance. The comments of R. C. Capo, R. B. Hanson, F. M. Richter, F. J. Spera, and an anonymous reviewer improved the manuscript. This work was supported by NSF grants EAR84-15143 and EAR88-04609.
Funders:
Funding AgencyGrant Number
NSFEAR84-15143
NSFEAR88-04609
Issue or Number:5045
DOI:10.1126/science.255.5045.708
Record Number:CaltechAUTHORS:20150123-110745772
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150123-110745772
Official Citation:STEWART, B. W., & DEPAOLO, D. J. (1992). Diffusive Isotopic Contamination of Mafic Magma by Coexisting Silicic Liquid in the Muskox Intrusion. Science, 255(5045), 708-711. doi: 10.1126/science.255.5045.708
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54019
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:23 Jan 2015 19:43
Last Modified:10 Nov 2021 20:26

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