A “high 4He/3He” mantle material detected under the East Pacific Rise (15°4′N)
We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km alo...
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| Autor*in: |
Mougel, Berengere [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Rechteinformationen: |
Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Geophysical research letters - Washington, DC : Union, 1974, 42(2015), 5, Seite 1375-1383 |
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| Übergeordnetes Werk: |
volume:42 ; year:2015 ; number:5 ; pages:1375-1383 |
| Links: |
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| DOI / URN: |
10.1002/2014GL062921 |
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| 520 | |a We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km along‐axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high 4 He/ 3 He mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He‐Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and the ambient peridotitic mantle. The He isotope difference between these two end‐members can be interpreted as a time evolution of two distinct mantle sources after a slight (U + Th)/ 3 He fractionation, likely due to some ancient degassing during the formation of deep continental pyroxenites. Mantle geochemical variability and heterogeneity Preservation of He isotope signatures in mantle‐derived melts | ||
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10.1002/2014GL062921 doi PQ20160617 (DE-627)OLC1964146879 (DE-599)GBVOLC1964146879 (PRQ)p946-ea60adb329908548a01d8b18bd59871ae8d08abfaf4001d777892900318efe2e0 (KEY)0026932820150000042000501375high4he3hemantlematerialdetectedundertheeastpacifi DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Mougel, Berengere verfasserin aut A “high 4He/3He” mantle material detected under the East Pacific Rise (15°4′N) 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km along‐axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high 4 He/ 3 He mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He‐Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and the ambient peridotitic mantle. The He isotope difference between these two end‐members can be interpreted as a time evolution of two distinct mantle sources after a slight (U + Th)/ 3 He fractionation, likely due to some ancient degassing during the formation of deep continental pyroxenites. Mantle geochemical variability and heterogeneity Preservation of He isotope signatures in mantle‐derived melts Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. MORB helium EPR mantle geochemistry isotopes hot spot Isotopes Geophysics Geochemistry Moreira, Manuel oth Agranier, Arnaud oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 5, Seite 1375-1383 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:5 pages:1375-1383 http://dx.doi.org/10.1002/2014GL062921 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014GL062921/abstract http://search.proquest.com/docview/1667065517 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 5 1375-1383 |
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10.1002/2014GL062921 doi PQ20160617 (DE-627)OLC1964146879 (DE-599)GBVOLC1964146879 (PRQ)p946-ea60adb329908548a01d8b18bd59871ae8d08abfaf4001d777892900318efe2e0 (KEY)0026932820150000042000501375high4he3hemantlematerialdetectedundertheeastpacifi DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Mougel, Berengere verfasserin aut A “high 4He/3He” mantle material detected under the East Pacific Rise (15°4′N) 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km along‐axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high 4 He/ 3 He mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He‐Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and the ambient peridotitic mantle. The He isotope difference between these two end‐members can be interpreted as a time evolution of two distinct mantle sources after a slight (U + Th)/ 3 He fractionation, likely due to some ancient degassing during the formation of deep continental pyroxenites. Mantle geochemical variability and heterogeneity Preservation of He isotope signatures in mantle‐derived melts Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. MORB helium EPR mantle geochemistry isotopes hot spot Isotopes Geophysics Geochemistry Moreira, Manuel oth Agranier, Arnaud oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 5, Seite 1375-1383 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:5 pages:1375-1383 http://dx.doi.org/10.1002/2014GL062921 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014GL062921/abstract http://search.proquest.com/docview/1667065517 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 5 1375-1383 |
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A “high 4He/3He” mantle material detected under the East Pacific Rise (15°4′N) |
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“high 4he/3he” mantle material detected under the east pacific rise (15°4′n) |
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A “high 4He/3He” mantle material detected under the East Pacific Rise (15°4′N) |
| abstract |
We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km along‐axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high 4 He/ 3 He mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He‐Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and the ambient peridotitic mantle. The He isotope difference between these two end‐members can be interpreted as a time evolution of two distinct mantle sources after a slight (U + Th)/ 3 He fractionation, likely due to some ancient degassing during the formation of deep continental pyroxenites. Mantle geochemical variability and heterogeneity Preservation of He isotope signatures in mantle‐derived melts |
| abstractGer |
We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km along‐axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high 4 He/ 3 He mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He‐Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and the ambient peridotitic mantle. The He isotope difference between these two end‐members can be interpreted as a time evolution of two distinct mantle sources after a slight (U + Th)/ 3 He fractionation, likely due to some ancient degassing during the formation of deep continental pyroxenites. Mantle geochemical variability and heterogeneity Preservation of He isotope signatures in mantle‐derived melts |
| abstract_unstemmed |
We investigate in details helium isotope data reported in Mougel et al . (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15°4′N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15 km along‐axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high 4 He/ 3 He mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He‐Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and the ambient peridotitic mantle. The He isotope difference between these two end‐members can be interpreted as a time evolution of two distinct mantle sources after a slight (U + Th)/ 3 He fractionation, likely due to some ancient degassing during the formation of deep continental pyroxenites. Mantle geochemical variability and heterogeneity Preservation of He isotope signatures in mantle‐derived melts |
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A “high 4He/3He” mantle material detected under the East Pacific Rise (15°4′N) |
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