Benthic foraminiferal oxygen isotopes of IODP Site 363-U1483
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2022
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| _version_ | 1867172179858161664 |
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| author | Gong, Li Holbourn, Ann E Kuhnt, Wolfgang |
| author_facet | Gong, Li Holbourn, Ann E Kuhnt, Wolfgang |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We selected three to eight well-preserved specimens of the benthic foraminiferal species Cibicidoides wuellerstorfi and/or Cibicidoides mundulus from the size fraction >250 μm. In 29 samples, only 1-2 specimens were analyzed and in 12 samples the species Uvigerina spp. or Hoeglundina elegans were measured, when C. wuellerstorfi and C. mundulus were rare or absent. Tests were broken into large fragments and cleaned in ethanol in an ultrasonic bath, then dried at 40°C. Measurements were performed with a Finnigan MAT 253 mass spectrometer coupled online to a Carbo-Kiel IV device for automated CO2 preparation from carbonate samples at the Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-University Kiel. Samples were reacted by individual acid addition (99% H3PO4 at 75°C). The external standard error is better than ±0.08‰ and ±0.05‰ for δ18O, based on international standards. Results were calibrated using the National Institute of Standard and Technology (NIST) (Gaithersburg, Maryland) carbonate isotope standard NBS (National Bureau of Standard) 19, and the international carbonate standard IAEA (International Atomic Energy Agency) 603 and reported on the Vienna PeeDee Belemnite (VPDB) scale. Duplicate measurements of 32 samples show an average standard deviation of 0.08‰ for δ18O. We applied a correction factor of −0.64‰ to Uvigerina δ18O and of -1.26‰ for Hoeglundina δ18O to normalize values to C. wuellerstorfi δ18O. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_948031 |
| institution | PANGAEA |
| language | en |
| publishDate | 2022 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Benthic foraminiferal oxygen isotopes of IODP Site 363-U1483 Gong, Li Holbourn, Ann E Kuhnt, Wolfgang 363-U1483A; 363-U1483B; 363-U1483C; AGE; Australian Monsoon; Cibicidoides mundulus, δ13C; Cibicidoides mundulus, δ18O; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Depth, composite revised; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp363; Hoeglundina elegans, δ13C; Hoeglundina elegans, δ18O; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; IODP Depth Scale Terminology; IODP Expedition 363; Joides Resolution; Mass spectrometer, Finnigan, MAT 253; Middle Pleistocene Transition; Sample code/label; Uvigerina spp., δ13C; Uvigerina spp., δ18O We selected three to eight well-preserved specimens of the benthic foraminiferal species Cibicidoides wuellerstorfi and/or Cibicidoides mundulus from the size fraction >250 μm. In 29 samples, only 1-2 specimens were analyzed and in 12 samples the species Uvigerina spp. or Hoeglundina elegans were measured, when C. wuellerstorfi and C. mundulus were rare or absent. Tests were broken into large fragments and cleaned in ethanol in an ultrasonic bath, then dried at 40°C. Measurements were performed with a Finnigan MAT 253 mass spectrometer coupled online to a Carbo-Kiel IV device for automated CO2 preparation from carbonate samples at the Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-University Kiel. Samples were reacted by individual acid addition (99% H3PO4 at 75°C). The external standard error is better than ±0.08‰ and ±0.05‰ for δ18O, based on international standards. Results were calibrated using the National Institute of Standard and Technology (NIST) (Gaithersburg, Maryland) carbonate isotope standard NBS (National Bureau of Standard) 19, and the international carbonate standard IAEA (International Atomic Energy Agency) 603 and reported on the Vienna PeeDee Belemnite (VPDB) scale. Duplicate measurements of 32 samples show an average standard deviation of 0.08‰ for δ18O. We applied a correction factor of −0.64‰ to Uvigerina δ18O and of -1.26‰ for Hoeglundina δ18O to normalize values to C. wuellerstorfi δ18O. |
| title | Benthic foraminiferal oxygen isotopes of IODP Site 363-U1483 |
| topic | 363-U1483A; 363-U1483B; 363-U1483C; AGE; Australian Monsoon; Cibicidoides mundulus, δ13C; Cibicidoides mundulus, δ18O; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Depth, composite revised; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp363; Hoeglundina elegans, δ13C; Hoeglundina elegans, δ18O; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; IODP Depth Scale Terminology; IODP Expedition 363; Joides Resolution; Mass spectrometer, Finnigan, MAT 253; Middle Pleistocene Transition; Sample code/label; Uvigerina spp., δ13C; Uvigerina spp., δ18O |
| url | https://doi.org/10.1594/PANGAEA.948031 |