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.
| Translated title of the contribution | Comparison of the trace element of clinopyroxenes and xenoliths with coarse-grained and shear peridotites |
|---|---|
| Original language | Chinese |
| Pages (from-to) | 263-268 |
| Number of pages | 6 |
| Journal | Acta Petrologica Sinica |
| Volume | 17 |
| Issue number | 2 |
| Publication status | Published - 2001 |
| Externally published | Yes |
Keywords
- Clinopyroxene
- Different microstructure
- Peridotite
- Trace element