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A study of REE and Pb, Sr and Nd isotopes in garnet-lherzolite xenoliths from Mingxi, Fujian Province

Chinese Journal of Geochemistry

By:
, , , and
DOI: 10.1007/BF02842191

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Abstract

The REE and Pb, Sr, Nd isotopes in three xenoliths from limburgite and scoria-breccias, including spinel-lherzolite, spinel-garnet-lherzolite and phlogopite-gamet-lherzolite, were analysed. The REE contents of the xenoliths are 1.3 to 3.3 times those of the chondrites with their REE patterns characterized by weak LREE depletion. The143Nd/144Nd values of whole rocks and minerals range from 0.51306 to 0.51345 with ??Nd=+ 8.2- +15.8,206Pb/204 Pb < 18.673, and207Pb/204Pb < 15.574. All this goes to show that the upper mantle in Mingxi at the depth of 67-82 km is a depleted mantle of MORB type, with87Sr/86 Sr ratios 0.70237-0.70390. In Nd-Sr diagram the data points of whole rocks are all out of the mantle array, implying that the xenoliths from Mingxi have more radiogenic Sr isotopes than those of the mantle array. ?? 1993 Institute of Geochemistry, Chinese Academy of Sciences.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A study of REE and Pb, Sr and Nd isotopes in garnet-lherzolite xenoliths from Mingxi, Fujian Province
Series title:
Chinese Journal of Geochemistry
DOI:
10.1007/BF02842191
Volume
12
Issue:
2
Year Published:
1993
Language:
English
Publisher location:
Science in China Press
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Chinese Journal of Geochemistry
First page:
97
Last page:
109
Number of Pages:
13