Peridotite xenoliths from Grenada, Lesser Antilles island arc

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doi: 10.1007/s00410-003-0500-z
Authors:Parkinson, I. J.; Auculus, R. J.; Eggins, S. M.
Author Affiliations:Primary:
Open University, Department of Earth Sciences, Milton Keynes, United Kingdom
Australian National University, Australia
Volume Title:Contributions to Mineralogy and Petrology
Source:Contributions to Mineralogy and Petrology, 146(2), p.241-262. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999
Publication Date:2003
Note:In English. 68 refs.; illus., incl. 9 tables, sketch map
Summary:Ultramafic xenoliths comprising harzburgite, lherzolite (reacted harzburgite) and spinel-rich dunite occur in alkali olivine basalts (M series) of Grenada in the Lesser Antilles island arc. Textures are protogranular, porphyroclastic and granular; the latter are restricted to dunites and areas of the harzburgites/ lherzolites where interaction with host magma has occurred. Primary mineralogy comprises olivine, orthopyroxene, clinopyroxene, and spinel. Harzburgites are residual from a fractional partial melting event totaling approximately 22%. Refertilisation of the mantle by reacting melts, producing a clinopyroxene-rich lithology, may form a source of ankaramitic (high-Ca) arc basalts. [G.L.B.]
Subsections:Igneous petrology
Subjects:Basalts; Chemical composition; Electron probe data; Geochemistry; Geologic barometry; Geologic thermometry; Harzburgite; ICP mass spectra; Igneous rocks; Inclusions; Island arcs; Magmas; Major elements; Mass spectra; Melting; Melts; Mineral assemblages; Mineral composition; Mossbauer spectra; Peridotites; Petrography; Petrology; Plate tectonics; Plutonic rocks; Silicate melts; Spectra; Textures; Ultramafic composition; Ultramafics; Veins; Volcanic rocks; Xenoliths; Antilles; Caribbean region; Grenada; Lesser Antilles; West Indies
Coordinates:N120000 N121200 W0613800 W0614600
Abstract Numbers:04M/766
Record ID:2004031390
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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