Quandt, Dennis; Micheuz, Peter; Kurz, Walter; Bernasconi, Stefano M; Hippler, Dorothee; Krenn, Kurt; Hauzenberger, Christoph (2019): Trace element concentrations and clumped isotope compositions of calcite veins pervading the Western Pacific Izu-Bonin forearc and rear arc crust' [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.906261, Supplement to: Quandt, Dennis; Micheuz, Peter; Kurz, Walter; Bernasconi, Stefano M; Hippler, Dorothee; Krenn, Kurt; Hauzenberger, C A (2020): Geochemistry and Microtextures of Vein Calcites Pervading the Izu‐Bonin Forearc and Rear Arc Crust: New Insights From IODP Expeditions 352 and 351. Geochemistry, Geophysics, Geosystems, 21(2), https://doi.org/10.1029/2019GC008745
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Abstract:
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.
Coverage:
Median Latitude: 27.958162 * Median Longitude: 138.878264 * South-bound Latitude: 27.383588 * West-bound Longitude: 134.318116 * North-bound Latitude: 28.449960 * East-bound Longitude: 142.753740
Date/Time Start: 2014-06-30T09:00:00 * Date/Time End: 2018-07-14T17:46:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
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Datasets listed in this publication series
- Quandt, D; Micheuz, P; Kurz, W et al. (2019): Clumped isotope compositions of calcite veins pervading the Western Pacific Izu-Bonin forearc and rear arc crust'. https://doi.org/10.1594/PANGAEA.906260
- Quandt, D; Micheuz, P; Kurz, W et al. (2019): Trace element concentrations of calcite veins pervading the Western Pacific Izu-Bonin forearc and rear arc crust'. https://doi.org/10.1594/PANGAEA.902424