PANGAEA_967157 Hydrogen Isotopes and revised SST of middle Miocene seawater from IODP Site 307-U1318 Hättig, Katrin; Varma, Devika; Louwye, Stephen; Schouten, Stefan; van der Meer, Marcel T J Hydrogen Isotopes and revised SST of middle Miocene seawater from IODP Site 307-U1318 2024-07-09 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.967157 Investigator Katrin Hättig katrin.haettig@nioz.nl Investigator Francesca Sangiorgi f.sangiorgi@uu.nl Investigator Devika Varma devika.varma@nioz.nl Earth Science Event label Sample code/label DEPTH, sediment/rock Depth, composite Age Laboratory code/label Alkenone C37:2, δD Alkenone C37:2, δD, standard deviation Replicates Branched and isoprenoid tetraether index Tetraether index of 86 carbon atoms Sea surface temperature Alkenone, unsaturation index UK'37 geoscientificInformation 307-U1318B 307-U1318C Drilling/drill rig Exp307 Hydrogen isotopes IODP Oxygen isotopes Temperature 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) Joides Resolution Complete 51.4358 51.435833333333 -11.550666666667 -11.550316666667 87.5 m (DEPTH, sediment/rock) 241.325 m (DEPTH, sediment/rock) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 3991 data points text/tab-separated-values Hättig, Katrin; Schouten, Stefan; Louwye, Stephen; van der Meer, Marcel T J (2024): Stable Middle Miocene Seawater Isotopes in the Eastern North Atlantic Ocean. Paleoceanography and Paleoclimatology, 39(10), e2024PA004852, https://doi.org/10.1029/2024PA004852

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.967157"!

https://doi.org/10.1016/j.gca.2010.05.027 Calculated according to Kim et al. (2010) https://doi.org/10.1016/j.gca.2015.05.044 Calculated according to Hopmans et al. (2004); De Jonge et al. (2015) https://doi.org/10.1016/j.orggeochem.2007.05.014 Calculated according to Schouten et al. (2007) https://doi.org/10.1016/S0016-7037(98)00097-0 Calculated from UK'37 (Müller et al, 1998) https://doi.org/10.1029/2012GL051157 Calculated according to Kim et al. (2012) https://doi.org/10.1029/2020PA004059 According to Sangiorgi (2021) https://doi.org/10.1029/2024PA004852 Stable Middle Miocene Seawater Isotopes in the Eastern North Atlantic Ocean https://doi.org/10.1038/330367a0 Calculated from UK'37 (Prahl and Wakeham, 1987) https://www-odp.tamu.edu:443/resolutn.html Joides Resolution DIF 9.4 2024-07-09 2026-06-11