SUBDUCTION-RELATED DIAMONDS? - THE EVIDENCE FOR A MANTLE-DERIVED ORIGIN FROM COUPLED δ13C - δ15N DETERMINATIONS

dc.contributor.author	Cartigny P.
dc.contributor.author	Girard M.
dc.contributor.author	Javoy M.
dc.contributor.author	Harris J.W.
dc.contributor.author	Phillips D.
dc.date.accessioned	2021-01-05T03:46:01Z
dc.date.available	2021-01-05T03:46:01Z
dc.date.issued	1998
dc.identifier	https://elibrary.ru/item.asp?id=31784665
dc.identifier.citation	Chemical Geology, 1998, , 1, 147-159
dc.identifier.issn	0009-2541
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/22267
dc.description.abstract	For the first time, δ13C–δ15N of more than 150 diamonds of known paragenesis, originating from different localities are reported. These coupled δ13C–δ15N determinations argue against a direct formation from subducted biogenic carbon for most of these diamonds. Our data confirm the apparent isotopic disequilibrium of nitrogen between the internal (mantle) and external (atmosphere+crust) reservoirs of the Earth, and thus support the heterogeneous accretion model of the Earth inferred from earlier fibrous diamond studies. We suggest that non-fibrous diamonds have recorded the evolution of the nitrogen isotopic composition starting from a δ15N-value lower than −25‰ to the present δ15N-value around −5‰. This isotopic composition change of man
dc.title	SUBDUCTION-RELATED DIAMONDS? - THE EVIDENCE FOR A MANTLE-DERIVED ORIGIN FROM COUPLED δ13C - δ15N DETERMINATIONS
dc.type	Статья

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