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Mineralogy, trace element composition, classification of Onello high-Ni ataxite
- Authors: Litasov K.D.1,2, Ishikawa A.3, Kopylova A.G.4, Podgornykh N.M.1, Pokhilenko N.P.1
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Affiliations:
- Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
- Novosibirsk State University
- Tokyo Institute of Technology
- Diamond and Precious Metal Geology Institute of Siberian Branch Russian Academy of Sciences
- Issue: Vol 485, No 4 (2019)
- Pages: 484-487
- Section: Geochemistry
- URL: https://journals.eco-vector.com/0869-5652/article/view/14231
- DOI: https://doi.org/10.31857/S0869-56524854484-487
- ID: 14231
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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.
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About the authors
K. D. Litasov
Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University
Author for correspondence.
Email: klitasov@igm.nsc.ru
Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090; 1, Pirogova street, Novosibirsk, 630090
A. Ishikawa
Tokyo Institute of Technology
Email: klitasov@igm.nsc.ru
Japan, 2-12-1, Meguro-ku, Ookayama, Tokyo, 152-8550
A. G. Kopylova
Diamond and Precious Metal Geology Institute of Siberian Branch Russian Academy of Sciences
Email: klitasov@igm.nsc.ru
Russian Federation, 39, Lenin avenue, Yakutsk, 677980
N. M. Podgornykh
Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: klitasov@igm.nsc.ru
Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090
N. P. Pokhilenko
Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: klitasov@igm.nsc.ru
Academician of the Russian Academy of Sciences
Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090References
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