Data/hora: 11/06/2024 07:00:14

Provedor de dados: | 5
País: | France
Título: | Helium isotopic composition of hydrothermal fluids from the Manus back-arc Basin, Papua New Guinea
Autores: | Fourre, E; Jean Baptiste, P; Charlou, Jean-luc; Donval, Jean-pierre; Ishibashi, J.
Data: | 2006-06
Ano: | 2006
Palavras-chave: | Western Pacific; Manus Basin; Back arc basins; Hydrothermal fluids; Helium isotopes.
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.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/2006/publication-4203.pdf

DOI:10.2343/geochemj.40.245

http://archimer.ifremer.fr/doc/00000/4203/

Editor: | Terrapub
Formato: | application/pdf
Fonte: | Geochemical Journal (0016-7002) (Terrapub), 2006-06 , Vol. 40 , N. 3 , P. 245-252

Fonte:

2006 by The Geochemical Society of Japan, Terrapub

info:eu-repo/semantics/openAccess

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