Oxygen-isotope evidence for recycled crust in the sources of mid-ocean-ridge basalts

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doi: 10.1038/35000553
Authors:Eiler, John M.; Schiano, Pierre; Kitchen, Nami; Stolper, Edward M.
Author Affiliations:Primary:
California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Other:
Institut de Physique du Globe de Paris, France
Université Blaise-Pascal, France
Volume Title:Nature (London)
Source:Nature (London), 403(6769), p.530-534. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:2000
Note:In English. 29 refs.; illus., incl. 2 tables
Summary:Analyses are presented of 28 fresh MORB glasses from the Atlantic, EPR and Indian Ocean for δ 18O, H2O, mg, the chondrite-normalized La/Sm ratio, and other geochemical data. Samples were collected from segments of the ridge system distant from regions influenced by hot-spot volcanism. Values of δ 18O correlate with absolute and relative abundances of incompatible elements (K2O, K2O/TiO2, K/Sr, K2O/H2O and the La/Ti ratio). These correlations indicate control of the oxygen isotope and incompatible element signature of MORBs, by a component of recycled crust variably distributed throughout their upper mantle sources. [R.K.H.]
Sections:Geochemistry
Subsections:Igneous rocks
Subjects:Basalts; Crust; Enrichment; Geochemistry; Glasses; Igneous rocks; Isotope ratios; Isotopes; Magmas; Mantle; Mid-ocean ridge basalts; O-18/O-16; Oxygen; Provenance; Stable isotopes; Upper mantle; Volcanic rocks; Atlantic Ocean; East Pacific; East Pacific Rise; Indian Ocean; Mid-Atlantic Ridge; Pacific Ocean
Abstract Numbers:00M/2944
Record ID:2000033903
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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