Nirenberg, Jared E; Herbert, Timothy D: C37 alkenones in Miocene sediments from ODP Site 188-1165 in the polar Southern Ocean [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.992822 (dataset in review)
Abstract:
We measured the concentrations of C37 alkenones in sediment samples from Ocean Drilling Program (ODP) Site 118-1165. From these concentrations, we calculated the unsaturation index of C37 alkenones (Uk'37) to quantify the evolution of sea surface temperatures in the polar Southern Ocean during the Miocene. To calculate temperatures, we applied the core-top calibration of Müller et al. (1998) for Uk'37. Alkenones were measured using a gas chromatograph with a flame ionization detector, Agilent Technologies, 7890/8890 equipped with an Agilent DB-1 column (60 m length, 0.32 mm diameter, 0.10 µm film thickness). C37 alkenone concentrations were quantified using internal standards of n-hexatricontane and n-heptatriacontane and were normalized to the dry mass of sediment extracted for each sample. Alkenones in some samples were measured using high performance liquid chromatography coupled with mass spectrometry (HPLC-MS) using a Zorbax Exclipes PAH column using the method of Liao et al. (2023). For samples measured using HPLC-MS, C37 alkenone concentrations were not quantified.
Keyword(s):
References:
Liao, Sian; Liu, Xiao-Lei; Manz, Katherine E; Pennell, Kurt D; Novak, Joseph B; Santos, Ewerton; Huang, Yongsong (2023): Comprehensive analysis of alkenones by reversed-phase HPLC-MS with unprecedented selectivity, linearity and sensitivity. Talanta, 260, 124653, https://doi.org/10.1016/j.talanta.2023.124653
Müller, Peter J; Kirst, Georg; Ruhland, Götz; Von Storch, Isabel; Rosell-Melé, Antoni (1998): Calibration of the alkenone paleotemperature index UK'37 based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S). Geochimica et Cosmochimica Acta, 62(10), 1757-1772, https://doi.org/10.1016/S0016-7037(98)00097-0
O'Brien, Philip E; Cooper, Alan K; Richter, C; et al. (2001): Proceedings of the Ocean Drilling Program, 188 Initial Reports. Proceedings of the Ocean Drilling Program, Ocean Drilling Program, 188, online, https://doi.org/10.2973/odp.proc.ir.188.2001
Prahl, Frederick G; Wakeham, Stuart G (1987): Calibration of unsaturation patterns in long-chain ketone compositions for paleotemperature assessment. Nature, 330(6146), 367-369, https://doi.org/10.1038/330367a0
Coverage:
Median Latitude: -64.379550 * Median Longitude: 67.218555 * South-bound Latitude: -64.379650 * West-bound Longitude: 67.218060 * North-bound Latitude: -64.379450 * East-bound Longitude: 67.219050
Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-14T20:30:00
Minimum DEPTH, sediment/rock: 56.25 m * Maximum DEPTH, sediment/rock: 598.20 m
Event(s):
188-1165B * Latitude: -64.379650 * Longitude: 67.219050 * Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-04T05:30:00 * Elevation: -3537.6 m * Penetration: 682.2 m * Recovery: 434.04 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 76 cores; 682.2 m cored; 0 m drilled; 63.6 % recovery
188-1165C * Latitude: -64.379450 * Longitude: 67.218060 * Date/Time Start: 2000-02-04T05:30:00 * Date/Time End: 2000-02-14T20:30:00 * Elevation: -3537.5 m * Penetration: 999.1 m * Recovery: 269.27 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 35 cores; 335.7 m cored; 663.4 m drilled; 80.2 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Nirenberg, Jared E | |||
| 2 | Sample code/label | Sample label | Nirenberg, Jared E | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Nirenberg, Jared E | IODP Depth Scale Terminology | Geocode – In meters below sea floor (mbsf) for the top of the sample interval. |
| 4 | Age | Age | Ma | Nirenberg, Jared E | ||
| 5 | AGE | Age | ka BP | Nirenberg, Jared E | Geocode | |
| 6 | Alkenone, unsaturation index UK'37 | UK'37 | Nirenberg, Jared E | Calculated from UK'37 (Prahl and Wakeham, 1987) | ||
| 7 | Sea surface temperature | SST | °C | Nirenberg, Jared E | Calculated from UK'37 (Müller et al, 1998) | |
| 8 | Alkenone, C37, per unit sediment dry mass | C37/sed dm | µg/g | Nirenberg, Jared E | Gas chromatograph with flame ionization detector (GC-FID), Agilent Technologies, Agilent 7890 / 8890 GC; coupled with Agilent DB-1 column |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2751 data points
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