EVIDENCE FOR SUBDUCTION-RELATED COMPONENTS IN THE SUBCONTINENTAL MANTLE FROM LOW 3HE/4HE AND 40AR/36AR RATIO IN MANTLE XENOLITHS FROM FAR EASTERN RUSSIA
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dc.contributor.author | Yamamoto J. | |
dc.contributor.author | Kaneoka I. | |
dc.contributor.author | Nakai S. | |
dc.contributor.author | Kagi H. | |
dc.contributor.author | Prikhod'ko V. | |
dc.contributor.author | Arai S. | |
dc.date.accessioned | 2022-03-30T02:31:56Z | |
dc.date.available | 2022-03-30T02:31:56Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=13471348 | |
dc.identifier.citation | Chemical Geology, 2004, 207, 3-4, 237-259 | |
dc.identifier.issn | 0009-2541 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/36763 | |
dc.description.abstract | By applying both vacuum crushing and stepwise heating methods for the extraction of the noble gases, we have discovered ³He/⁴He ratios much lower than the atmospheric ratio (∼0.3 RA; RA is the atmospheric ³He/⁴He ratio of 1.4×10⁻⁶) and relatively low ⁴⁰Ar/³⁶Ar ratios (<1000) in olivine separates from some subcontinental mantle-derived xenoliths from Far Eastern Russia. The low ³He/⁴He ratios cannot be explained by the addition of radiogenic ⁴He generated in-situ after the eruption of magma entraining the xenoliths. Furthermore, petrographic evidence suggests that incorporation of crustal fluids is not likely. Hence, it must reflect a feature of the Far Eastern Russian upper mantle. | |
dc.title | EVIDENCE FOR SUBDUCTION-RELATED COMPONENTS IN THE SUBCONTINENTAL MANTLE FROM LOW 3HE/4HE AND 40AR/36AR RATIO IN MANTLE XENOLITHS FROM FAR EASTERN RUSSIA | |
dc.type | Статья |
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