Email this article Formation parameters of high-pressure minerals in the Dhofar 717 AND 864 chondrite meteorites
- Authors: Litasov K.D.1, Badyukov D.D.2, Pokhilenko N.P.1
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Affiliations:
- V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
- Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences
- Issue: Vol 485, No 3 (2019)
- Pages: 346-350
- Section: Geochemistry
- URL: https://journals.eco-vector.com/0869-5652/article/view/12877
- DOI: https://doi.org/10.31857/S0869-56524853346-350
- ID: 12877
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Abstract
This paper presents the results of a Raman spectroscopic study of shock melt veins in L6 chondritic meteorites Dhofar 717 and 864, and conclusions about the PT-parameters recorded in these meteorites after the impact event. The primary minerals of the host chondrite include olivine, orthopyroxene, clinopyroxene, plagioclase, chromite, phosphates, troilite, and kamasite. Shock melt veins up to 1 cm thick contain fragments of the high- pressure minerals ringwoodite, wadsleyite, majorite, akimotoite, jadeite, lingunite, and tuite and quenched melt consisting of majorite, ringwoodite, troilite, and kamasite. The mineral associations of the Dhofar 717 and 864 chondrites indicate high peak PT-parameters of the impact in the region of stability of majorite (>20 GPa and >2500 K) and bridgmanite (>25 GPa and >2500 K). The presence of lingunite also directly indicates a peak pressure in the area of stability of the bridgmanite.
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About the authors
K. D. Litasov
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Author for correspondence.
Email: klitasov@igm.nsc.ru
Russian Federation, Novosibirsk
D. D. Badyukov
Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences
Email: klitasov@igm.nsc.ru
Russian Federation, Moscow
N. P. Pokhilenko
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: klitasov@igm.nsc.ru
academician of the RAS
Russian Federation, NovosibirskReferences
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