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^(17)O anomalies in sedimentary silica and oxides

Levin, N. E. and Raub, T. D. and Dauphas, N. and Eiler, J. M. (2010) ^(17)O anomalies in sedimentary silica and oxides. Geochimica et Cosmochimica Acta, 74 (12). A585. ISSN 0016-7037. http://resolver.caltech.edu/CaltechAUTHORS:20130731-094940963

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Abstract

Recent oxygen isotope measurements demonstrate small but significant deviations from a single mass dependent fractionation line among terrestrial materials [1, 2]. These anomalies confirm theoretical expectations of variation in the δ^(17)-δ^(18) relationship for equilibrium and kinetic isotope fractionations such that kinetic processes result in a relatively shallow slope (0.513) and equilibrium procesess result in a steeper slope (0.529) [3]. Here we present Δ^(17)O data for sedimentary silica and oxides, including cherts and banded iron formation (BIF) materials. We report Δ^(17)O relative to a reference line (δ^(17)O-δ^(18)O), slope 0.530 ± 0.003 (95% conf, MSWD = 1.07 [4]), that we produced from analysis of igneous and high-grade meta-igneous garnet, albite, pyroxene, olivine and quartz. This slope is higher than slopes previously generated for garnets (0.527 ± 0.001) and quartz (0.524 ± 0.001) in other laboratories [2], but within error of the slope predicted for equilibrium fractionation (0.529).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.gca.2010.04.037DOIArticle
http://www.sciencedirect.com/science/article/pii/S001670371000222XPublisherArticle
Additional Information:© 2010 Published by Elsevier Ltd.
Record Number:CaltechAUTHORS:20130731-094940963
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130731-094940963
Official Citation:Goldschmidt Abstracts 2010 – L, Geochimica et Cosmochimica Acta, Volume 74, Issue 12, Supplement, June 2010, Pages A553-A648, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2010.04.037.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39671
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Aug 2013 18:37
Last Modified:06 Aug 2013 18:37

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