The Mineralogy and Geochemistry of Mantle Xenoliths from Diamondiferous Kimberlite of China and Russia

被引：0

作者：

Vorobei, S. S. ^{[1
]}

Garanin, V. K. ^{[1
]}

Minervina, E. A. ^{[2
]}

Posukhova, T. V. ^{[1
]}

Weisheng, X. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Geol, Moscow 119991, Russia

[2] Russian Acad Sci, Inst Geol Ore Deposits Petrog Mineral & Geochem, Moscow 119017, Russia

来源：

MOSCOW UNIVERSITY GEOLOGY BULLETIN | 2020年 / 75卷 / 02期

关键词：

kimberlite; xenoliths; mantle metasomatism; GARNET; GEOTHERMOMETER; LHERZOLITES;

D O I：

10.3103/S014587522002012X

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Xenoliths from the Mir pipe and from the Shandong and Liaoning provinces were studied by the methods of EMPA and ICP-MS. Their mineralogical, geochemical, and genetic features were revealed. Minerals of diamondiferous paragenesis were detected in xenoliths from the Mir pipe, while they were not found in xenoliths of China. All xenoliths are characterized by secondary alterations, which are more intense in xenoliths of China. The distribution of REEs shows the involvement of subduction processes in the formation of xenoliths from the Mir pipe. The influence of metasomatism is clearly evident in xenoliths from China. The calculatedP-Tparameters (T= 600-700 degrees C,P= 2-2.5 GPa) are not consistent with the mantle environments that correspond to the metasomatic conditions.

引用

页码：128 / 135

页数：8

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