ULTRARAPID EXHUMATION OF ULTRAHIGH-PRESSURE DIAMOND-BEARING METASEDIMENTARY ROCKS OF THE KOKCHETAV MASSIF, KAZAKHSTAN?

dc.contributor.author	Hacker B.R.
dc.contributor.author	Calvert A.
dc.contributor.author	Zhang R.Y.
dc.contributor.author	Ernst W.G.
dc.contributor.author	Liou J.G.
dc.date.accessioned	2022-02-05T05:13:35Z
dc.date.available	2022-02-05T05:13:35Z
dc.date.issued	2003
dc.description.abstract	The diamond-bearing, ultrahigh-pressure Kokchetav Massif recrystallized at eclogite-facies conditions deep in the mantle at 180-km depth at 535 F 3 Ma, and yet new 40 Ar/ 39 Ar ages suggest that it may have been exhumed to crustal depths (as indicated by closure of mica to Ar loss) by f 529 Ma. These data indicate a possible exhumation rate of tens of kilometers per million years, i.e., a rate that is comparable to rates of horizontal plate motion and subduction.
dc.identifier	https://elibrary.ru/item.asp?id=14215439
dc.identifier.citation	Lithos, 2003, 70, 3-4, 61-75
dc.identifier.issn	0024-4937
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/35004
dc.subject	Kokchetav Massif
dc.subject	Ultrahigh-pressure metamorphism
dc.subject	Excess argon
dc.subject	Exhumation rate
dc.title	ULTRARAPID EXHUMATION OF ULTRAHIGH-PRESSURE DIAMOND-BEARING METASEDIMENTARY ROCKS OF THE KOKCHETAV MASSIF, KAZAKHSTAN?
dc.type	Статья

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