OXYGEN ISOTOPIC HOMOGENEITY OF THE EARTH: NEW EVIDENCE

dc.contributor.author	Robert F.
dc.contributor.author	Rejou-Michel A.
dc.contributor.author	Javoy M.
dc.date.accessioned	2020-11-09T02:14:15Z
dc.date.available	2020-11-09T02:14:15Z
dc.date.issued	1992
dc.identifier	https://elibrary.ru/item.asp?id=31564690
dc.identifier.citation	Earth and Planetary Science Letters, 1992, , 1, 1-9
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/18696
dc.description.abstract	The two oxygen isotope ratios18O/16O and17O/16O were analyzed in Precambrian (3.5 Gy) and modern cherts and in mantle-derived lavas. All samples exhibit oxygen isotopic compositions consistent with mass-dependent isotopic fractionation from a single reservoir and thus suggest that 3.5 Gy ago the Earth was already a well-mixed body. These results would therefore not support models of ocean accretion by cometary impact later than 3.7 ± 0.1 Gy. New measurements on lunar rocks confirm oxygen isotopic homogeneity of the Earth-Moon system and thus suggests that the internal mixing of the two bodies pre-dates their accretion. The recent giant impact model used to explain how the Moon was formed is also compatible with our results.
dc.subject	Precambrian	en
dc.title	OXYGEN ISOTOPIC HOMOGENEITY OF THE EARTH: NEW EVIDENCE
dc.type	Статья
dc.subject.age	Precambrian	en
dc.subject.age	Докембрий	ru

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