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| Autores principales: | , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2021
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| Materias: | |
| Acceso en línea: | https://doi.org/10.1594/PANGAEA.929643 |
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| _version_ | 1867171026457067520 |
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| author | Gose, Jürgen Schmädicke, Esther |
| author_facet | Gose, Jürgen Schmädicke, Esther |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Orthopyroxene was analyzed as a proxy for water in melt-depleted, supra-subduction-zone peridotite by polarized infrared radiation. Samples from Conical (site 779) and Torishima seamount (site 784), located c. 1300 km apart in the Mariana-Izu-Bonin forearc (ODP-Leg 125), have very similar average H2O contents of 215 ppm (Conical) and 191 ppm (Torishima). Conical peridotite equilibrated at lower temperature (760 ºC) and lower oxygen fugacity (site average: ΔlogFMQ -0.65) compared to samples from Torishima (830 ºC; ΔlogFMQ +0.33). The degree of partial melting is almost identical for the two sites (18 and 20 %). The recorded H2O concentrations are considerably higher than those in samples from the Bismarck forearc (31-92 ppm H2O; Tollan and Hermann, 2019). Instead, the average values resemble those of peridotitic orthopyroxene from mid-ocean-ridge (MOR) settings. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_929643 |
| institution | PANGAEA |
| language | en |
| publishDate | 2021 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | IR investigation of peridotite from ODP-Leg125, Mariana-Izu-Bonin forearc Gose, Jürgen Schmädicke, Esther 125-779A; 125-784A; Binary Object; Binary Object (File Size); Binary Object (Media Type); DRILL; Drilling/drill rig; FTIR; Joides Resolution; Leg125; Mariana-Izu-Bonin forearc; North Pacific Ocean; Ocean Drilling Program; ODP; orthopyroxene; peridotite; water Orthopyroxene was analyzed as a proxy for water in melt-depleted, supra-subduction-zone peridotite by polarized infrared radiation. Samples from Conical (site 779) and Torishima seamount (site 784), located c. 1300 km apart in the Mariana-Izu-Bonin forearc (ODP-Leg 125), have very similar average H2O contents of 215 ppm (Conical) and 191 ppm (Torishima). Conical peridotite equilibrated at lower temperature (760 ºC) and lower oxygen fugacity (site average: ΔlogFMQ -0.65) compared to samples from Torishima (830 ºC; ΔlogFMQ +0.33). The degree of partial melting is almost identical for the two sites (18 and 20 %). The recorded H2O concentrations are considerably higher than those in samples from the Bismarck forearc (31-92 ppm H2O; Tollan and Hermann, 2019). Instead, the average values resemble those of peridotitic orthopyroxene from mid-ocean-ridge (MOR) settings. |
| title | IR investigation of peridotite from ODP-Leg125, Mariana-Izu-Bonin forearc |
| topic | 125-779A; 125-784A; Binary Object; Binary Object (File Size); Binary Object (Media Type); DRILL; Drilling/drill rig; FTIR; Joides Resolution; Leg125; Mariana-Izu-Bonin forearc; North Pacific Ocean; Ocean Drilling Program; ODP; orthopyroxene; peridotite; water |
| url | https://doi.org/10.1594/PANGAEA.929643 |