GEOCHEMICAL AND ISOTOPIC STUDIES OF THE SEDIMENTARY AND GRANITIC ROCKS OF THE ALTAI OROGEN OF NORTHWEST CHINA AND THEIR TECTONIC IMPLICATIONS

dc.contributor.author	Chen B.
dc.contributor.author	Jahn B.-M.
dc.date.accessioned	2021-05-24T02:09:20Z
dc.date.available	2021-05-24T02:09:20Z
dc.date.issued	2002
dc.identifier	https://www.elibrary.ru/item.asp?id=13727488
dc.identifier.citation	Geological Magazine, 2002, 139, 1, 1-13
dc.identifier.issn	0016-7568
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/28636
dc.description.abstract	The Altai orogen (northwest China) represents the southwestern margin of the Central Asian Orogenic Belt. Geochemical and Nd3.4 to 1.8 Ga, and ISr = 0.7106 to 0) and ISr (0.7110.7051). Voluminous syn-orogenic granitoids have [varepsilon]Nd(T) = +2.1 to 0.714 and TDM = 0.7–1.6 Ga. They were not derived by melting of local metasedimentary rocks as suggested by previous workers, but by melting of a more juvenile source at depth. Post-orogenic granites have higher [varepsilon]Nd(T) ([similar] +4.4) than the syn-orogenic granitoids, indicating their derivation from a deeper crustal level where juvenile crust may predominate.
dc.title	GEOCHEMICAL AND ISOTOPIC STUDIES OF THE SEDIMENTARY AND GRANITIC ROCKS OF THE ALTAI OROGEN OF NORTHWEST CHINA AND THEIR TECTONIC IMPLICATIONS
dc.type	Статья

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