Hydrogen Isotopes and revised SST of middle Miocene seawater from IODP Site 307-U1318 ...

• Main Authors: Hättig, Katrin, Varma, Devika, Louwye, Stephen, Schouten, Stefan, van der Meer, Marcel T J
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Hydrogen isotopes; oxygen isotopes; Temperature; Event label; Sample code/label; DEPTH, sediment/rock; Depth, composite; Age; Laboratory code/label; Alkenone C372, δD; Alkenone C372, δD, standard deviation; Replicates; Branched and isoprenoid tetraether index; Tetraether index of 86 carbon atoms; Sea surface temperature; Alkenone, unsaturation index UK'37; Drilling/drill rig; According to Sangiorgi 2021; Isotope Ratio Mass Spectrometer IRMS, Thermo Fisher Scientific, Delta V; Calculated according to Hopmans et al. 2004; De Jonge et al. 2015; Calculated according to Schouten et al. 2007; Calculated according to Kim et al. 2010; Calculated according to Kim et al. 2012; Calculated from UK'37 Prahl and Wakeham, 1987; Calculated from UK'37 Müller et al, 1998; Exp307; Joides Resolution; North East Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.967157; https://doi.pangaea.de/10.1594/PANGAEA.967157

Mid-Miocene (16.6 - 12.8 Ma) hydrogen isotopes of alkenones and sea temperatures are obtained from the sediment record of Integrated Ocean Discovery Program (IODP) Expedition 307, Site U1318 drilled in the Porcupine Basin, north east Atlantic at a water depth of ~ 400 m. We present a revised temperature record (cf Sangiorgi et al., 2021, doi:10.1029/2020PA004059). The polar fractions used in the study of Sangiorgi et al. (2021, doi:10.1029/2020PA004059) were re-analysed and integrated for TEX86H and along with the UK'37 record extended by 25 samples. Across the total record (269 samples), 124 ketone samples were analysed for the hydrogen isotopic compositions of C37 long chain alkenones (δ2HC37) with a GC-IRMS. ...