A unique diamondiferous peridotite xenolith from the Udachnaya kimberlite pipe, Yakutia: role of subduction in diamond formation

@inproceedings{Logvinova2015AUD,
  title={A unique diamondiferous peridotite xenolith from the Udachnaya kimberlite pipe, Yakutia: role of subduction in diamond formation},
  author={Alla M. Logvinova and Lawrence A. Taylor and Elena Fedorova and Alexander P. Yelisseyev and Richard Wirth and Geoffrey H. Howarth and Vadim N. Reutsky and Nikolay V. Sobolev},
  year={2015}
}
A unique xenolith of diamond-bearing pyrope peridotite has been studied, which consists of enstatite (Al2O3 = 0.39-0.43 wt.%; Cr2O3 = 0.20-0.23 wt.%; FeO = 4.81-5.1 wt.%; average Mg# = 92.7) and pyrope (0^3 = 4.43-5.11 wt.%; CaO = 4.15-4.8 wt.%; Mg# = 83.6-84.1). The xenolith is small (10.5 g) but contains more than 30,000 diamond microcrystals (10-700 qm). High-resolution 2D and 3D X-ray tomographic images show the volume ratios of rock-forming minerals and an uneven distribution of diamonds… CONTINUE READING

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