Enhanced mantle-to-crust rhenium transfer in undegassed arc magmas.
Saved in:
| Title: | Enhanced mantle-to-crust rhenium transfer in undegassed arc magmas. |
|---|---|
| Authors: | Sun, Weidong, Bennett, Vickie C., Eggins, Stephen M., Kamenetsky, Vadim S., Arculus, Richard J. |
| Source: | Nature. 3/20/2003, Vol. 422 Issue 6929, p294. 4p. |
| Subjects: | Rhenium, Magmas, Osmium |
| Abstract: | Variations in the 187Os/188Os isotopic signature of mantle and mantle-derived rocks have been thought to provide a powerful chemical tracer of deep Earth structure. Many studies have inferred from such data that a long-lived, high-rhenium component exists in the deep mantle (187Re is the parent isotope decaying to 187Os, with a half-life of 42 billion years), and that this reservoir probably consists of subducted oceanic crust. The interpretation of these isotopic signatures is, however, dependent on accurate estimates of rhenium and osmium concentrations in all of the main geochemical reservoirs, and the crust has generally been considered to be a minor contributor to such global budgets. In contrast, we here present observations of high rhenium concentrations and low Yb/Re ratios in arc-type melt inclusions. These results indicate strong enrichment of rhenium in undegassed arc rocks, and consequently the continental crust, which results in a crustal estimate of 2?p.p.b. rhenium, as compared to previous estimates of 0.4-0.2?p.p.b. (refs 4, 5). Previous determinations of rhenium in arc materials, which were largely measured on subaerially erupted samples, are likely to be in error owing to rhenium loss during degassing. High mantle-to-crust rhenium fluxes, as observed here, require a revaluation of geochemical models based on the 187Re-187Os decay system. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
|---|---|
| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 9331210 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Enhanced mantle-to-crust rhenium transfer in undegassed arc magmas. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sun%2C+Weidong%22">Sun, Weidong</searchLink><br /><searchLink fieldCode="AR" term="%22Bennett%2C+Vickie+C%2E%22">Bennett, Vickie C.</searchLink><br /><searchLink fieldCode="AR" term="%22Eggins%2C+Stephen+M%2E%22">Eggins, Stephen M.</searchLink><br /><searchLink fieldCode="AR" term="%22Kamenetsky%2C+Vadim+S%2E%22">Kamenetsky, Vadim S.</searchLink><br /><searchLink fieldCode="AR" term="%22Arculus%2C+Richard+J%2E%22">Arculus, Richard J.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 3/20/2003, Vol. 422 Issue 6929, p294. 4p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Rhenium%22">Rhenium</searchLink><br /><searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br /><searchLink fieldCode="DE" term="%22Osmium%22">Osmium</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Variations in the 187Os/188Os isotopic signature of mantle and mantle-derived rocks have been thought to provide a powerful chemical tracer of deep Earth structure. Many studies have inferred from such data that a long-lived, high-rhenium component exists in the deep mantle (187Re is the parent isotope decaying to 187Os, with a half-life of 42 billion years), and that this reservoir probably consists of subducted oceanic crust. The interpretation of these isotopic signatures is, however, dependent on accurate estimates of rhenium and osmium concentrations in all of the main geochemical reservoirs, and the crust has generally been considered to be a minor contributor to such global budgets. In contrast, we here present observations of high rhenium concentrations and low Yb/Re ratios in arc-type melt inclusions. These results indicate strong enrichment of rhenium in undegassed arc rocks, and consequently the continental crust, which results in a crustal estimate of 2?p.p.b. rhenium, as compared to previous estimates of 0.4-0.2?p.p.b. (refs 4, 5). Previous determinations of rhenium in arc materials, which were largely measured on subaerially erupted samples, are likely to be in error owing to rhenium loss during degassing. High mantle-to-crust rhenium fluxes, as observed here, require a revaluation of geochemical models based on the 187Re-187Os decay system. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=9331210 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature01482 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 294 Subjects: – SubjectFull: Rhenium Type: general – SubjectFull: Magmas Type: general – SubjectFull: Osmium Type: general Titles: – TitleFull: Enhanced mantle-to-crust rhenium transfer in undegassed arc magmas. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sun, Weidong – PersonEntity: Name: NameFull: Bennett, Vickie C. – PersonEntity: Name: NameFull: Eggins, Stephen M. – PersonEntity: Name: NameFull: Kamenetsky, Vadim S. – PersonEntity: Name: NameFull: Arculus, Richard J. IsPartOfRelationships: – BibEntity: Dates: – D: 20 M: 03 Text: 3/20/2003 Type: published Y: 2003 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 422 – Type: issue Value: 6929 Titles: – TitleFull: Nature Type: main |
| ResultId | 1 |
