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Hättig, Katrin; Varma, Devika; Louwye, Stephen; Schouten, Stefan; van der Meer, Marcel T J (2024): Middle Miocene seawater isotope evolution at IODP Site 307-U1318 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967156

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Abstract:
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. Surface seawater isotopes are calculated based on the hydrogen isotopic compositions of C37 long chain alkenones (δ2HC37) with the environment calibration of Gould et al. (2019, doi:10.1016/j.gca.2018.12.004). The bottom seawater isotopes are based on oxygen isotopes of benthic foraminifera (record from Quaijtaal et al., 2018, doi:10.1017/S0016756816001278) and subsurface temperature (subT) estimates (TEX86H). We applied the calibration of Cramer et al. (2011, doi:10.1029/2011JC007255) and calculated subT with the 0-200 m equation of Kim et al. (2012, doi:10.1029/2012GL051157).
Keyword(s):
Hydrogen isotopes; oxygen isotopes; Temperature
Supplement to:
Hättig, Katrin; Varma, Devika; Louwye, Stephen; Schouten, Stefan; van der Meer, Marcel T J (in review): Stable Middle Miocene seawater isotopes in the eastern North Atlantic Ocean. Paleoceanography and Paleoclimatology
Funding:
European Commission (EC), grant/award no. 847504: Local training network: Netherlands Earth System Science Centre: “NESSC”
Coverage:
Median Latitude: 51.435817 * Median Longitude: -11.550492 * South-bound Latitude: 51.435800 * West-bound Longitude: -11.550667 * North-bound Latitude: 51.435833 * East-bound Longitude: -11.550317
Minimum DEPTH, sediment/rock: 87.500 m * Maximum DEPTH, sediment/rock: 241.325 m
Event(s):
307-U1318B * Latitude: 51.435800 * Longitude: -11.550317 * Elevation: -408.8 m * Recovery: 213 m * Campaign: Exp307 (Porcupine Basin Carbonate Mounds) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 244.6 m cored; 87.1 % recovered; 0 m drilled; 244.6 m penetrated
307-U1318C * Latitude: 51.435833 * Longitude: -11.550667 * Elevation: -409.9 m * Recovery: 84.15 m * Campaign: Exp307 (Porcupine Basin Carbonate Mounds) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 10 cores; 87.4 m cored; 96.3 % recovered; 67.1 m drilled; 154.5 m penetrated
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventHättig, Katrin
2Sample code/labelSample labelHättig, Katrin
3DEPTH, sediment/rockDepth sedmHättig, KatrinGeocode
4Depth, compositeDepth compmcdHättig, Katrin
5AgeAgeMaHättig, KatrinAccording to Sangiorgi (2021)doi:10.1594/PANGAEA.926325
6Alkenone C37:2, δDC37:2 δD‰ SMOWHättig, KatrinIsotope Ratio Mass Spectrometer (IRMS), Thermo Fisher Scientific, Delta V
7Alkenone C37:2, δD, standard deviationC37:2 δD std dev±Hättig, KatrinIsotope Ratio Mass Spectrometer (IRMS), Thermo Fisher Scientific, Delta V
8ReplicatesRepl#Hättig, Katrin
9δ Deuterium, waterδD H2O‰ SMOWHättig, KatrinCalculated according to Gould et al. (2019)VSOMW
10Depth, compositeDepth compmcdHättig, KatrinAccording to Sangiorgi (2021)Depth of neighbour sample for TEX86H subT (doi:10.1594/PANGAEA.926325)
11Sea surface temperatureSST°CHättig, KatrinCalculated from TEX86L (Kim et al., 2012)0-200 m calibration
12Depth, compositeDepth compmcdHättig, KatrinCalculated according to Willemijn et al. (2018)Depth of δ18O benthic
13Foraminifera, benthic δ18OForam benth δ18O‰ PDBHättig, KatrinCalculated according to Willemijn et al. (2018)
14δ18O, waterδ18O H2O‰ SMOWHättig, KatrinCalculated according to Cramer et al. (2011)BSW
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1310 data points

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