| 我国金伯利岩稀土元素特征 |
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| 引用本文： | 董振信.我国金伯利岩稀土元素特征[J].岩石矿物学杂志,1992,11(2):125-134. |
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| 作者姓名： | 董振信 |
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| 作者单位： | 中国地质博物馆 北京 |
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| 摘 要： | 我国山东、辽宁、贵州、山西及河北金伯利岩的稀土总量很高,且变化大。金伯利岩中稀土的球粒陨石标准配分模式为简单的较平滑的线,属LREE极富集型。不同岩体REE含量和配分模式的差异与部分熔融程度、地幔的非均一性、金伯利岩浆早期结晶的石榴石巨晶矿物的含量、壳源物质的混染作用、岩浆中挥发份含量及岩体的产状有关。钙钛矿是金伯利岩中主要的稀土载体矿物,次为磷灰石。
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| 关 键 词： | 金伯利岩 稀土元素 |
The Characteristics of Rare Earth Elements from Kimberlites in China |
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| Dong Zhenxin Geological Museum of China.The Characteristics of Rare Earth Elements from Kimberlites in China[J].Acta Petrologica Et Mineralogica,1992,11(2):125-134. |
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| Authors: | Dong Zhenxin Geological Museum of China |
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| Institution: | Dong Zhenxin Geological Museum of China |
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| Abstract: | The total REE contents of kimberlites in China exhibit wide variations,ranging from 218.9 ppm to 1473.24 ppm. The kimberlites are characterizedby simple linear REE distribution pattern showing extreme enrichment inLREE. The abundances of La and Yb are 180--1190 and 3--15 times thoseof chondritic respectively. La/Yb ratios range from 73.16 to 517.5.Principal mineral carrier of REE in kimberlites is perovskite (40--20000times chondritic abundance). Apatite (15--5000 times chondritic abundance)is of subordinate importance. Phlogopite(0.25--27 times chondritic abundan-ce), pyrope (0.45--7.9 times chondritic abundance), Cr-spinel (0.2--1 timeschondritic abundance) are low in REE. The REE contents of whole rocks ofkimberlites and distribution patterns are mainly controlled by perovskite, |
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| Keywords: | kimberlite rare earth elements |
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