Publication Date:
2024-04-25
Description:
Dissolved sulfate sulfur and oxygen isotope results and carbonate associated sulfate sulfur isotope results from IODP Site U1553 (166°11.4801′E, 52°13.4294′S) located on the Campbell Plateau are presented. Pore water collected during IODP Expedition 378 at Site U1553 in January 2020 were used for this study. These samples were processed using a procedure modified from that in Wotte et al. (2012, doi:10.1016/j.gca.2012.02.013) to extract the sulfate from the aqueous phase. The dissolved sulfate in the pore water was extracted by first adding 10% HCl to acidify the pore water, then the sulfate was removed from solution as barium sulfate using a 10% BaCl2 solution. Sulfur isotopes in dissolved sulfate were analyzed using an EA-Isolink elemental analyzer connected in continuous flow to a MAT253 IRMS and the oxygen isotopes in dissolved sulfate were measured using a thermal conversion elemental analyzer connected in continuous flow to a Delta V IRMS. Analytical precision was measured using repeated measurements of a blind standard with an average 2-sigma of 0.4‰ for sulfur isotopes (IAEA-SO-5) and 0.3‰ for oxygen isotopes (NBS-127). These data were collected to examine the impact of a long-duration (~26-million-year) unconformity has on the fidelity of the carbonate geochemical archive.
Keywords:
378-U1553A; 378-U1553B; 378-U1553C; Date/Time of event; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; EXP378; Isotope ratio mass spectrometer (IRMS), Thermo Fisher, Delta Plus; coupled with Universal continuous flow interface, Thermo Fisher, Conflo II; coupled with Isotope Ratio Mass Spectrometer, Thermo Fisher, Delta Plus; Isotope ratio mass spectrometer (IRMS), Thermo Fisher, MAT253; coupled with Universal continuous flow interface, Thermo Fisher, Conflo IV; coupled with Elemental Analyzer, Thermo Fisher, EA-Isolink; Joides Resolution; Latitude of event; Longitude of event; oxygen isotopes; Paleoceanography; Sample code/label; South Pacific; Sulfur isotopes; δ18O, sulfate; δ18O, sulfate, standard deviation; δ34S, sulfate
Type:
Dataset
Format:
text/tab-separated-values, 401 data points
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