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Water in boninite glass and coexisting orthopyroxene: concentration and partitioning

Dobson, Patrick F. and Skogby, Henrik and Rossman, George R. (1995) Water in boninite glass and coexisting orthopyroxene: concentration and partitioning. Contributions to Mineralogy and Petrology, 118 (4). pp. 414-419. ISSN 0010-7999. http://resolver.caltech.edu/CaltechAUTHORS:20130515-134453447

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Abstract

Spectroscopic measurements of water in glass inclusions in pyroxene from boninite samples from the Bonin Islands conclusively document the high (2.8–3.2 wt%) primary water contents of boninite magmas. Associated quenched glass from pillow lava rims have slightly lower (2.2–2.4 wt%) water contents, suggesting that minor amounts of degassing occurred between the time of melt entrapment in the orthopyroxenes and subsequent eruption on the sea floor. Some zonation of molecular water contents in pillow rim glasses was observed. OH contents of the host orthopyroxene phenocrysts were also measured, allowing for the calculation of partition coefficients for water between boninite melt and orthopyroxene. These values (0.003–0.004) for water partitioning between orthopyroxene and mafic melts may help constrain petrogenetic models of mantle-derived magmas.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s004100050023DOIArticle
http://link.springer.com/article/10.1007/s004100050023PublisherArticle
ORCID:
AuthorORCID
Rossman, George R.0000-0002-4571-6884
Additional Information:© 1995 Springer-Verlag. Received: 20 September 1993; Accepted: 26 June 1994. This work was supported by NSF EAR 86-18200 and EAR 91-04059 (to GRR), and DOE DE-FG-03-85ER 13445 (to E. M. Stolper). HS acknowledges support through the Knut and Alice Wallenberg Foundation. We thank Fred Anderson and Ed Stolper for their exchange of ideas and comments on this project, and Mike Garcia and Greg Hirth for their reviews of the manuscript. Division of Geological and Planetary Sciences contribution # 5269.
Funders:
Funding AgencyGrant Number
NSFEAR 86-18200
NSFEAR 91-04059
Department of Energy (DOE)DE-FG-03-85ER 13445
Knut and Alice Wallenberg FoundationUNSPECIFIED
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Caltech Division of Geological and Planetary Sciences5269
Record Number:CaltechAUTHORS:20130515-134453447
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130515-134453447
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38524
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:16 May 2013 17:32
Last Modified:07 Feb 2017 04:01

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