Geochemistry of peridotite xenoliths in alkali basalts from Jeju Island, Korea SCIE SCOPUS

Cited 24 time in WEB OF SCIENCE Cited 20 time in Scopus
Title
Geochemistry of peridotite xenoliths in alkali basalts from Jeju Island, Korea
Author(s)
Choi, SH; Lee, JI; Park, CH; Moutte, J
Publication Year
2002-12
Abstract
Ultramafic xenoliths in alkali basalts from Jeju Island, Korea, are mostly spinel lherzolites with subordinate amounts of spinel harzburgites and pyroxenites. The compositions of major oxides and compatible to moderately incompatible elements of the Jeju peridotite xenoliths suggest that they are residues after various extents of melting. The estimated degrees of partial melting from compositionally homogeneous and unfractionated mantle to form the residual xenoliths reach 30%. However, their complex patterns of chondrite-normalized rare earth element, from light rare earth element (LREE)-depleted through spoon-shaped to LREE-enriched, reflect an additional process. Metasomatism by a small amount of melt/fluid enriched in LREE followed the former melt removal, which resulted in the enrichment of the incompatible trace elements. Sr and Nd isotopic ratios of the Jeju xenoliths display a wide scatter from depleted mid-oceanic ridge basalt (MORB)-like to near bulk-earth estimates along the MORB-oceanic island basalt (OIB) mantle array The varieties in modal proportions of minerals, (La/Yb)(N) ratio and Sr-Nd isotopes for the xenoliths demonstrate that the lithospheric mantle beneath Jeju Island is heterogeneous. The heterogeneity is a probable result of its long-term growth and enrichment history.
ISSN
1038-4871
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5643
DOI
10.1046/j.1440-1738.2002.00367.x
Bibliographic Citation
ISLAND ARC, v.11, no.4, pp.221 - 235, 2002
Publisher
WILEY
Subject
UPPER-MANTLE BENEATH; SUBCONTINENTAL LITHOSPHERE; ULTRAMAFIC XENOLITHS; TRACE-ELEMENT; COMPOSITIONAL VARIATIONS; CHEMICAL GEODYNAMICS; ISOTOPE GEOCHEMISTRY; VOLCANIC FIELD; EASTERN CHINA; SAN-CARLOS
Keywords
Jeju Island; mantle xenolith; metasomatism; residue
Type
Article
Language
English
Document Type
Article
Publisher
WILEY
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse