Hättig, Katrin; Prokopiou, Panteleimon; Schouten, Stefan; van der Meer, Marcel T J (2024): Sea surface temperature and stable isotopes of alkenones for IODP Site 321-U1338 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.968585
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Published: 2024-05-28 • DOI registered: 2024-06-26
Abstract:
Middle Miocene to Pleistocene (1-14.5 Ma) compound-specific hydrogen and carbon isotopes of alkenones and sea surface temperature (UK'37) are obtained from the sediment record of Integrated Ocean Discovery Program (IODP) Expedition 321, Site U1338 drilled in the equatorial Pacific. The very depleted hydrogen isotope ratios suggest that factors other than the isotopic composition of seawater affect the hydrogen isotopic composition of alkenones. Comparison with modern Pacific Ocean data (see Wolhowe et al., 2015; Wolfshorndl et al., 2019) and analysis of carbon isotopes of alkenones suggest that subsurface production of alkenones at low light intensity had a strong impact on the hydrogen isotopic composition of alkenones.
Supplement to:
Hättig, Katrin; Prokopiou, Panteleimon; Schouten, Stefan; van der Meer, Marcel T J (2024): Large variability and 2H-depletion of Middle Miocene to Pleistocene alkenone hydrogen isotopes in the Equatorial Pacific reflect subsurface, low light haptophyte growth. Organic Geochemistry, 104840, https://doi.org/10.1016/j.orggeochem.2024.104840
References:
Rousselle, Gabrielle; Beltran, Catherine; Sicre, Marie-Alexandrine; Raffi, Isabella; De Refélis, Marc (2013): Changes in sea-surface conditions in the Equatorial Pacific during the middle Miocene–Pliocene as inferred from coccolith geochemistry. Earth and Planetary Science Letters, 361, 412-421, https://doi.org/10.1016/j.epsl.2012.11.003
Wolfshorndl, Marta; Danford, Rebecca; Sachs, Julian P (2019): 2H/1H fractionation in microalgal lipids from the North Pacific Ocean: Growth rate and irradiance effects. Geochimica et Cosmochimica Acta, 246, 317-338, https://doi.org/10.1016/j.gca.2018.11.027
Wolhowe, Matthew D; Prahl, Fredrick G; Langer, Gerald; Oviedo, Angela Maria; Ziveri, Patrizia (2015): Alkenone δD as an ecological indicator: A culture and field study of physiologically-controlled chemical and hydrogen-isotopic variation in C37 alkenones. Geochimica et Cosmochimica Acta, 162, 166-182, https://doi.org/10.1016/j.gca.2015.04.034
Project(s):
Funding:
European Commission (EC), grant/award no. 847504: Local training network: Netherlands Earth System Science Centre: “NESSC”
Coverage:
Latitude: 2.507820 * Longitude: -117.969560
Date/Time Start: 2009-06-06T19:00:00 * Date/Time End: 2009-06-11T17:00:00
Minimum DEPTH, sediment/rock: 17.65 m * Maximum DEPTH, sediment/rock: 346.82 m
Event(s):
321-U1338B * Latitude: 2.507820 * Longitude: -117.969560 * Date/Time Start: 2009-06-06T19:00:00 * Date/Time End: 2009-06-11T17:00:00 * Elevation: -4209.9 m * Recovery: 417.18 m * Campaign: Exp321 (Pacific Equatorial Age Transect II / Juan de Fuca) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 413.6 m cored; 100.87 % recovered; 2.5 m drilled; 416.1 m penetrated
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Hättig, Katrin | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Hättig, Katrin | Geocode – mbsf | |
| 3 | Age | Age | Ma | Hättig, Katrin | after Rousselle et al. (2013) | |
| 4 | AGE | Age | ka BP | Hättig, Katrin | Geocode – after Rousselle et al. (2013) | |
| 5 | Laboratory code/label | Lab label | Hättig, Katrin | NIOZ Lab-ID | ||
| 6 | Alkenone, unsaturation index UK'37 | UK'37 | Hättig, Katrin | Calculated from C37 alkenones (Prahl & Wakeham, 1987) | ||
| 7 | Sea surface temperature, annual mean | SST (1-12) | °C | Hättig, Katrin | Calculated from UK'37 (Müller et al, 1998) | |
| 8 | Sea surface temperature, annual mean | SST (1-12) | °C | Hättig, Katrin | SST, from UK'37 (Conte et al., 2006) | |
| 9 | Alkenone C37:2, δD | C37:2 δD | ‰ SMOW | Hättig, Katrin | Isotope Ratio Mass Spectrometer (IRMS), Thermo Fisher Scientific, Delta V | vs. VSMOW |
| 10 | Replication | Repl | Hättig, Katrin | Number of replication analysis of hydrogen isotopes | ||
| 11 | Alkenone C37:2, δD, standard deviation | C37:2 δD std dev | ± | Hättig, Katrin | Calculated, 2 sigma | |
| 12 | Alkenone C37:2, δ13C | C37:2 δ13C | ‰ PDB | Hättig, Katrin | Isotope Ratio Mass Spectrometer (IRMS), Thermo Fisher Scientific, Delta V | vs. VPDB |
| 13 | Replication | Repl | Hättig, Katrin | Number of replication analysis of carbon isotopes | ||
| 14 | Alkenone C37:2, δ13C, standard deviation | C37:2 δ13C std dev | ± | Hättig, Katrin | Calculated, 2 sigma |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
498 data points