CLINOPYROXENE-OLIVINE-ILMENITE MEGACRYST ASSEMBLAGE IN KIMBERLITE FROM THE UDACHNAYA PIPE

dc.contributor.author	Kostrovitskii S.I.
dc.contributor.author	Alymova N.V.
dc.contributor.author	Suvorova L.F.
dc.contributor.author	Spetsius Z.V.
dc.date.accessioned	2022-08-03T05:21:02Z
dc.date.available	2022-08-03T05:21:02Z
dc.date.issued	2004
dc.identifier	https://www.elibrary.ru/item.asp?id=13467668
dc.identifier.citation	Doklady Earth Sciences, 2004, 396, 4, 504-507
dc.identifier.issn	1028-334X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/38479
dc.description.abstract	The picroilmenite-rich (up to 60 vol % ilmenite) kimberlite found in the Udachnaya-Vostochnaya Pipe is a unique case. A zone enriched in large picroilmenite and olivine phenocrysts (from 3-5 to 20 mm or more) was found in a large kimberlite block from the Udachnaya-Vostochnaya Pipe at a depth of more than 400 m. Separate picroilmenite megacrysts grow together with clinopyroxene or contain large clinopyroxene inclusions (up to 1 cm or more). This phenomenon is unique in the following aspects: (1) association of three megacryst minerals (first finding of clinopyroxene megacrysts in kimberlite of the Udachnaya Pipe); (2) strong enrichment in picroilmenite megacrysts; (3) absence of serpentinization and, consequently, fresh appearance of minerals.
dc.title	CLINOPYROXENE-OLIVINE-ILMENITE MEGACRYST ASSEMBLAGE IN KIMBERLITE FROM THE UDACHNAYA PIPE
dc.type	Статья

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