THE BREAKDOWN OF DIOPSIDE TO CA-RICH MAJORITE AND GLASS IN A SHOCKED H CHONDRITE

dc.contributor.author	Tomioka N.
dc.contributor.author	Kimura M.
dc.date.accessioned	2021-12-24T05:12:37Z
dc.date.available	2021-12-24T05:12:37Z
dc.date.issued	2003
dc.identifier	https://www.elibrary.ru/item.asp?id=1463251
dc.identifier.citation	Earth and Planetary Science Letters, 2003, 208, 3-4, 271-278
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/33780
dc.description.abstract	Fine-grained assemblages of majorite and glassy grains are for the first time identified in a shock-induced melt vein in an H chondritic meteorite. The bulk chemical composition of these aggregates is similar to that of diopside CaMgSi2O6 in the host rock. Both majorite and glassy grains are Ca-rich and their formulae can be approximated as (Mg0.65Fe0.09Ca0.26)SiO3 and (Mg0.23Fe0.05Ca0.72)SiO3, respectively. These Ca-rich assemblages are dissociation products of the host diopside and were produced at ~18-24 GPa by a shock event. The CaSiO3-rich glass is inferred to have crystallized in a perovskite structure, but was vitrified during the pressure release.
dc.subject	SHOCK EVENT
dc.subject	H CHONDRITE
dc.subject	DIOPSIDE
dc.subject	MAJORITE
dc.subject	PEROVSKITE
dc.title	THE BREAKDOWN OF DIOPSIDE TO CA-RICH MAJORITE AND GLASS IN A SHOCKED H CHONDRITE
dc.type	Статья

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