INHERITED PB COMPONENTS IN MAGMATIC TITANITE AND THEIR CONSEQUENCE FOR THE INTERPRETATION OF U-PB AGES

dc.contributor.author	Lian-Sheng Z.
dc.contributor.author	Scharer U.
dc.date.accessioned	2020-11-21T02:36:43Z
dc.date.available	2020-11-21T02:36:43Z
dc.date.issued	1996
dc.identifier	https://elibrary.ru/item.asp?id=487641
dc.identifier.citation	Earth and Planetary Science Letters, 1996, , 1, 57-65
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/19198
dc.description.abstract	The occurrence of inherited radiogenic Pb components in 35 Ma old magmatic titanite is reported here for the first time. The about 810 Ma age of the inherited components is identical to that contained in zircon from the same amphibole-bearing syenite sample. In both minerals the Precambrian components were not totally reset during magmatic new growth at 35 Ma. This age pattern substantiates that the U-Pb chronometer in titanite is resistant to temperatures in excess of 712°C, as is already known for zircon and monazite. In consequence, U-Pb ages from crystalline titanites have to be interpreted as the age of mineral formation or re-crystallization, rather than the time of U-Pb system closure during cooling of the rock.
dc.subject	U/PB
dc.subject	TITANITE
dc.subject	METAMICTIZATION
dc.subject	OVERPRINTING
dc.title	INHERITED PB COMPONENTS IN MAGMATIC TITANITE AND THEIR CONSEQUENCE FOR THE INTERPRETATION OF U-PB AGES
dc.type	Статья

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