Hydrogen isotopic composition of alkenones and oxygen isotopes of benthic foraminifera from ODP Site 202-1235 ...
Hydrogen isotopic compositions of C37 long chain alkenones (δ2HC37) have been proposed as a proxy for past seawater salinity and applied in several regions. However, previous studies were based solely on a single core and often suggested unlikely large changes in salinity. Here we present a new δ2HC37 record, in combination with oxygen isotopes of benthic foraminifera from the same samples, from a sediment core from the Chilean margin (ODP site 1235). The observed negative shift in δ2HC37 of 20‰ during deglaciation was identical to that of the nearby located, but deeper, ODP core 1234 (Weiss e... Mehr ...
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| Dokumenttyp: | dataset |
| Erscheinungsdatum: | 2023 |
| Verlag/Hrsg.: |
PANGAEA
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| Schlagwörter: | Alkenones / Chile Margin / hydrogen isotopic composition / oxygen isotopes / Uvigerina / Event label / Sample code/label / DEPTH / sediment/rock / Depth / composite / AGE / δ Deuterium / alkenone / C37 / standard deviation / Alkenone C37:3 / δD / Alkenone C37:2 / C38 / Replicates / Uvigerina spp. / δ18O / δ18O standard deviation / Drilling/drill rig / DSDP/ODP/IODP sample designation / Isotope Ratio Mass Spectrometer IRMS / Thermo Fisher Scientific / Delta V / Mass spectrometer / Finnigan / MAT 253; coupled with Carbonate preparation device / KIEL VI / Leg202 / Joides Resolution / NIOZ Royal Netherlands Institute for Sea Research / and Utrecht University NIOZ_UU / Ocean Drilling Program ODP |
| Sprache: | Englisch |
| Permalink: | https://search.fid-benelux.de/Record/base-29160277 |
| Datenquelle: | BASE; Originalkatalog |
| Powered By: | BASE |
| Link(s) : | https://dx.doi.org/10.1594/pangaea.958880 |
Hydrogen isotopic compositions of C37 long chain alkenones (δ2HC37) have been proposed as a proxy for past seawater salinity and applied in several regions. However, previous studies were based solely on a single core and often suggested unlikely large changes in salinity. Here we present a new δ2HC37 record, in combination with oxygen isotopes of benthic foraminifera from the same samples, from a sediment core from the Chilean margin (ODP site 1235). The observed negative shift in δ2HC37 of 20‰ during deglaciation was identical to that of the nearby located, but deeper, ODP core 1234 (Weiss et al., 2019), suggesting a regionally consistent shift in δ2HC37. Here we present an isotope dataset spanning 0.15-94.43 mbsf. The age model of Haettig et al., 2023 covers the last 40.000 years spanning 0.15-49.50 mbfs. ...