| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Helium isotopic composition of hydrothermal fluids from the Manus back-arc Basin, Papua New Guinea
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| Autores: |
Fourre, E
Jean Baptiste, P
Charlou, Jean-luc
Donval, Jean-pierre
Ishibashi, J
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| Data: |
2006-06
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| Ano: |
2006
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| Palavras-chave: |
Western Pacific
Manus Basin
Back arc basins
Hydrothermal fluids
Helium isotopes
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| Resumo: |
We present isotopic analysis of helium in hydrothermal fluids from the Manus back-arc basin, collected during the French-Japanese Manusflux and Manaute cruises in 1995 and 2000, respectively. The helium isotope composition of the fluids is comparable to that measured elsewhere in similar subduction environments, with He-3/He-4 values (7.4 to 7.9 R-a) slightly lower than typical MORB values, except on the Manus Spreading Center (MSC) where higher values (12 +/- 0.1 R-a) are observed. The causal link between the narrow spatial extent of the He-3/He-4 anomaly at the MSC and a He-3-rich deep mantle component remains elusive, based on available geophysical data. Thus, the Manus Spreading Center results may be an interesting example of small scale upper-mantle heterogeneity.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2006/publication-4203.pdf
DOI:10.2343/geochemj.40.245
http://archimer.ifremer.fr/doc/00000/4203/
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| Editor: |
Terrapub
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| Formato: |
application/pdf
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| Fonte: |
Geochemical Journal (0016-7002) (Terrapub), 2006-06 , Vol. 40 , N. 3 , P. 245-252
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| Direitos: |
2006 by The Geochemical Society of Japan, Terrapub
info:eu-repo/semantics/openAccess
restricted use
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