The Mineralogy and Geochemistry of Mantle Xenoliths from Diamondiferous Kimberlite of China and Russia,Moscow University Geology Bulletin

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The Mineralogy and Geochemistry of Mantle Xenoliths from Diamondiferous Kimberlite of China and Russia
Moscow University Geology Bulletin ( IF 0.3 ) Pub Date : 2020-06-17 , DOI: 10.3103/s014587522002012x
S. S. Vorobei , V. K. Garanin , E. A. Minervina , T. V. Posukhova , X. Weisheng

Abstract

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 calculated P–T parameters (Т = 600–700°C, P = 2–2.5 GPa) are not consistent with the mantle environments that correspond to the metasomatic conditions.

更新日期：2020-06-17

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