VARIATION OF THE PHASE COMPOSITION OF C2 CHONDRITES ON HEATING

dc.contributor.author	Khramov D.A.
dc.contributor.author	Malysheva T.V.
dc.contributor.author	Tobelko K.I.
dc.contributor.author	Shcherbovsky E.Y.
dc.contributor.author	Malyshev A.I.
dc.date.accessioned	2020-02-13T02:30:29Z
dc.date.available	2020-02-13T02:30:29Z
dc.date.issued	1982
dc.identifier	https://elibrary.ru/item.asp?id=30960054
dc.identifier.citation	EARTH AND PLANETARY SCIENCE LETTERS, 1982, 60, 1, 8-16
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/15612
dc.description.abstract	The kinetics of metamorphism of the Staroe Boriskino C2 chondrite heated at 450°C in an inert atmosphere of helium flow was investigated. After being heated at 450°C during 160 minutes one specimen was moreover heated for 10 minutes at 500°C. The phase distribution was determined by means of Mössbauer spectroscopy, X-ray diffraction analysis, and electron probe microanalysis. The material changes rapidly (1–2 minutes). As a result of dehydration, the iron of the phyllosilicate is oxidized, the charge compensation being realized through the removal of iron and magnesium cations with the formation of magnetite and forsterite. Upon 10 minutes additional heating at 500°C iron appears in the olivine structure, the degree of iron oxidation declines, and magnetite disappears. Possible trends of change of C2 chondrite material are:
dc.title	VARIATION OF THE PHASE COMPOSITION OF C2 CHONDRITES ON HEATING
dc.type	Статья

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