Trace element concentrations and clumped isotope compositions of calcite veins pervading the Western Pacific Izu-Bonin forearc and rear arc crust'
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2019
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| _version_ | 1867169516744605696 |
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| author | Quandt, Dennis Micheuz, Peter Kurz, Walter Bernasconi, Stefano M Hippler, Dorothee Krenn, Kurt Hauzenberger, Christoph |
| author_facet | Quandt, Dennis Micheuz, Peter Kurz, Walter Bernasconi, Stefano M Hippler, Dorothee Krenn, Kurt Hauzenberger, Christoph |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | International Ocean Discovery Program Expeditions 352 and 351 drilled into the Western Pacific Izu-Bonin forearc and rear arc. The drill cores revealed that the forearc is composed of forearc basalts (FAB) and boninites, and the rear arc consists of FAB-like rocks. These rocks are pervaded by calcite veins, which document extensive fluid circulation and secondary mineralization. Here we present two data sets with rare earth element and yttrium (REE+Y) concentrations and clumped isotopic (Δ47) compositions. Clumped isotopes reveal precipitation temperatures < 100 °C. REE+Y characteristics and clumped isotopic compositions indicate varying parental fluid compositions ranging from pristine seawater to variably modified seawater. The most pristine seawater signatures are recorded by FAB-hosted low-T (< 30 °C) vein calcites with seawater-like REE+Y distribution patterns and parental fluid δ18O values within the range of seawater (-2 to +2 ‰ VSMOW). As a result of weak fluid-rock interaction and precipitation from modified seawater, boninite-hosted low-T (< 30 °C) vein calcites show reduced Y/Ho ratios (< 36) and less pronounced negative Ce anomalies relative to seawater. In the rear arc, intense low-T host rock alteration produced fluids with significantly depleted δ18O compositions (up to -9.7 ‰ VSMOW) and reduced Y/Ho ratios (< 36). Vein calcites precipitated at temperatures up to 74 ± 12 °C. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_906261 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Trace element concentrations and clumped isotope compositions of calcite veins pervading the Western Pacific Izu-Bonin forearc and rear arc crust' Quandt, Dennis Micheuz, Peter Kurz, Walter Bernasconi, Stefano M Hippler, Dorothee Krenn, Kurt Hauzenberger, Christoph Calcite veins; Clumped isotopes; IODP; Rare earth elements International Ocean Discovery Program Expeditions 352 and 351 drilled into the Western Pacific Izu-Bonin forearc and rear arc. The drill cores revealed that the forearc is composed of forearc basalts (FAB) and boninites, and the rear arc consists of FAB-like rocks. These rocks are pervaded by calcite veins, which document extensive fluid circulation and secondary mineralization. Here we present two data sets with rare earth element and yttrium (REE+Y) concentrations and clumped isotopic (Δ47) compositions. Clumped isotopes reveal precipitation temperatures < 100 °C. REE+Y characteristics and clumped isotopic compositions indicate varying parental fluid compositions ranging from pristine seawater to variably modified seawater. The most pristine seawater signatures are recorded by FAB-hosted low-T (< 30 °C) vein calcites with seawater-like REE+Y distribution patterns and parental fluid δ18O values within the range of seawater (-2 to +2 ‰ VSMOW). As a result of weak fluid-rock interaction and precipitation from modified seawater, boninite-hosted low-T (< 30 °C) vein calcites show reduced Y/Ho ratios (< 36) and less pronounced negative Ce anomalies relative to seawater. In the rear arc, intense low-T host rock alteration produced fluids with significantly depleted δ18O compositions (up to -9.7 ‰ VSMOW) and reduced Y/Ho ratios (< 36). Vein calcites precipitated at temperatures up to 74 ± 12 °C. |
| title | Trace element concentrations and clumped isotope compositions of calcite veins pervading the Western Pacific Izu-Bonin forearc and rear arc crust' |
| topic | Calcite veins; Clumped isotopes; IODP; Rare earth elements |
| url | https://doi.org/10.1594/PANGAEA.906261 |