Mineralogy, Trace Element Composition, and Classification of Onello High-Ni Ataxite

K. D. Litasov, A. Ishikawa, A. G. Kopylova, N. M. Podgornykh, N. P. Pokhilenko

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Abstract: The trace element composition of the Onello meteorite is analyzed in detail using SEM and LA-ICP-MS. The following Ni contents of minerals are determined (wt %): 23.0–25.4 in taenite, 5.8–8.8 in kamacite, 22–26 in schreibersite, 44–52 in nickelphosphide, 20.6–21.8 in allabogdanite, and 75–81 in awaruite. In the trace element content, the Onello meteorite corresponds to the IAB group of iron meteorites. Inside this group, it mostly matches the sHH subgroup (with high Au and Ni contents). The presence of allabogdanite in the meteorite indicates the high PT parameters of its formation: >8 GPa and 1000–1400°C. Thus, the formation of the Onello meteorite is related to impact metamorphism of a parental body of iron meteorites of the IAB group and vinonaites, in which a P- and Ni-rich area underwent melting and further crystallization.

Original languageEnglish
Pages (from-to)381-385
Number of pages5
JournalDoklady Earth Sciences
Volume485
Issue number2
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • METEORITE

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