Oxygen isotope evidence for slab-derived fluids in the sub-arc mantle

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doi: 10.1038/31679
Authors:Eiler, John M.; McInnes, Brent; Valley, John W.; Graham, Colin M.; Stolper, Edward M.
Author Affiliations:Primary:
California Institute of Technology, Division of Geological and Planetary Science, Pasadena, CA, United States
Other:
CSIRO Exploration and Mining, Australia
University of Wisconsin, United States
University of Edinburgh, United Kingdom
Volume Title:Nature (London)
Source:Nature (London), 393(6687), p.777-781. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1998
Note:In English. 36 refs.; illus., incl. 1 table
Summary:Analyses are presented of major, minor and trace elements and δ 18OSMOW of glass and related inclusions in mantle olivine xenoliths from Simberi Island, New Guinea. The host alkali basalts contain lherzolite and harzburgite xenoliths (orthopyroxene, clinopyroxene, spinel) and xenoliths derived from the mantle above the Manus-Kilinaulau subduction zone. The xenoliths contain secondary Na-rich clinopyroxene, amphibole, Ti-rich phlogopite, magnetite, K-rich feldspar, calcite, apatite, anhydrite and Na-rich phonolitic silicate glass inclusions. The oxygen isotope data provide direct evidence that these inclusions were derived from a source rich in subducted oceanic crust, and that slab-derived fluids have infiltrated the sub-arc mantle wedge. [R.K.H.]
Sections:Geochemistry
Subsections:Igneous rocks
Subjects:Alkali basalts; Basalts; Chemical composition; Crust; Enrichment; Fluid phase; Geochemistry; Glasses; Igneous rocks; Inclusions; Ion probe; Island arcs; Isotope ratios; Isotopes; Lava; Magmas; Major elements; Mantle; Mass spectroscopy; Nesosilicates; O-18/O-16; Oceanic crust; Olivine; Olivine group; Orthosilicates; Oxygen; Plate tectonics; Silicates; Siliceous composition; Slabs; Spectroscopy; Stable isotopes; Subduction; Trace elements; Volcanic glass; Volcanic rocks; Xenoliths; Malay Archipelago; New Guinea; Simberi Island
Abstract Numbers:98M/3935
Record ID:1998046947
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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