粗粒与剪切结构橄榄岩捕虏体及其单斜辉石微量元素对比

Translated title of the contribution: Comparison of the trace element of clinopyroxenes and xenoliths with coarse-grained and shear peridotites

J. P. Zheng*, F. X. Lu, S. Y. O'Reilly, C. M. Yu

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The mineral chemistry, petrochemistry and the trace element of "dry" spinel-facies peridotitic xenoliths with different microstructure and their clinopyroxenes are compared and discussed in this paper. With the increasing metamorphism and deformation of peridotites in the transform from the coarse-grained to the shear microstructure, the complex processes on enrichment and depletion existed. The metasomatism agent was the SiO2-undersaturation silicate-carbonatite melt with strong infiltration. The results also show that the REE relationship between "dry" spinel-facies peridotitic xenoliths with different microstructure and their clinopyroxenes are following: there are obvious differences between coarse-grained peridotite and its clinopyroxene, on the other hand, the REE pattern of clinopyroxene can totally represent its host peridotite: there is only a little difference between shear peridotite and its clinopyroxene. The other high incompatible elements most probably existed as the inter-grain constituents or in fluid inclusions.

Original languageChinese
Pages (from-to)263-268
Number of pages6
JournalActa Petrologica Sinica
Volume17
Issue number2
Publication statusPublished - 2001
Externally publishedYes

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Keywords

  • Clinopyroxene
  • Different microstructure
  • Peridotite
  • Trace element

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