THE RE-OS ISOTOPE SYSTEM IN COSMOCHEMISTRY AND HIGH-TEMPERATURE GEOCHEMISTRY
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dc.contributor.author | Shirey S.B. | |
dc.contributor.author | Walker R.J. | |
dc.date.accessioned | 2020-12-31T08:31:24Z | |
dc.date.available | 2020-12-31T08:31:24Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=13812211 | |
dc.identifier.citation | Annual Review of Earth and Planetary Sciences, 1998, , , 423-500 | |
dc.identifier.issn | 0084-6597 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21909 | |
dc.description.abstract | The Re-Os isotope sytem, based on the long-lived β − transition of 187 Re to 187 Os, has matured to wide use in cosmochemistry and high-temperature geochemistry. The siderophilic/chalcophilic behavior of Re and Os is different from that of the elements that comprise most other long-lived radiogenic isotope systems. Mag-matic iron meteorites (IIIAB, IIAB, IVA, and IVB) have Re-Os isochrons that indicate asteroidal core crystallization within the first 10–40 million years of Solar System evolution. Rocks from Earth's convecting mantle show generally chondritic Re/Os evolution throughout Earth history that is explained by the ad-dition of highly siderophile elements to the mantle after core formation via late accretion. Oceanic basalts have Os-isotope systematics that improve the detailed geological interpretation of extant mantle components. Some portions of ancient subcontinental lithospheric mantle are severely depleted in Re and have corre-spondingly subchondritic 187 Os/ 188 Os, indicating long-term isolation from the convecting mantle during the Archean-Proterozoic. Magmatic ore deposits have differences in initial Os isotopic composition traceable to the crustal vs mantle sources of the platinum-group elements and base metals. | |
dc.subject | Archean | en |
dc.subject | Proterozoic | en |
dc.title | THE RE-OS ISOTOPE SYSTEM IN COSMOCHEMISTRY AND HIGH-TEMPERATURE GEOCHEMISTRY | |
dc.type | Статья | |
dc.subject.age | Докембрий::Протерозой | ru |
dc.subject.age | Precambrian::Proterozoic | en |
dc.subject.age | Precambrian::Archean | en |
dc.subject.age | Докембрий::Архей | ru |
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