Cuboctahedral type Ib diamonds in ophiolitic chromitites and peridotites: the evidence for anthropogenic contamination

Konstantin D. Litasov, Hiroyuki Kagi, Tatyana B. Bekker, Takafumi Hirata, Yoshiki Makino

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Here we present trace element compositions of synthetic diamonds, which show spectacular similarity with the compositions of metallic inclusions in type Ib cuboctahedral diamonds in ophiolitic chromitites and peridotites. The compositions of inclusions in synthetic and ophiolite diamonds closely correspond to Ni:Mn:Co = 70:25:5 in wt.%, which is the most widely used catalyst for HPHT growth of synthetic diamonds in China. Thus, we claim for thorough reconsideration of diamonds in ophiolitic rocks and emphasize that most of them appear by anthropogenic contamination.

Original languageEnglish
Pages (from-to)480-488
Number of pages9
JournalHigh Pressure Research
Volume39
Issue number3
DOIs
Publication statusPublished - 3 Jul 2019

Keywords

  • chromitite
  • Diamond
  • high pressure
  • HPHT synthesis
  • peridotite
  • PODIFORM CHROMITITES
  • ULTRAHIGH-PRESSURE
  • MANTLE PERIDOTITES
  • LUOBUSA OPHIOLITE
  • DISCOVERY
  • ALLOYS
  • GROWTH
  • SYNTHETIC DIAMOND
  • TIBET
  • INSIGHTS

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