A study of REE and Pb, Sr and Nd isotopes in garnet-lherzolite xenoliths from Mingxi, Fujian Province
Chinese Journal of Geochemistry
By: H. Wankang, W. Junwen, A. R. Basu, and M. Tatsumoto
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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.
| 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 |
| Google Analytic Metrics | Metrics page |