Publication Date:
2024-01-09
Description:
Delta18O and delta13C values for the calcareous dinoflagellate species Orthopithonella? globosa (Fütterer 1984) Lentin and Williams 1985 and Pirumella krasheninnikovii (Bolli 1974) Lentin and Williams 1993 from lates Campanian and earliest Maastrichtian of ODP Hole 690C (Weddell Sea, Antarctic Ocean) have been studied in order to evaluate the species' depth habitat in the water column and their applicability in paleoceanographic studies. The calcareous dinoflagellates show isotopic values comparable to probably shallow-dwelling planktic foraminifera from the same sample in delta18O, but have an offset of about -5 ‰ to -7‰ in delta13C. This suggests that calcareous dinoflagellate oxygen isotopes may provide information for paleoceanographic reconstructions of sea-surface water temperatures, whereas their extremely light carbon isotope values are probably due to photosynthetic processes.
Keywords:
113-690C; Archaeoglobigerina australis; Archaeoglobigerina australis, δ13C; Archaeoglobigerina australis, δ18O; Archaeoglobigerina mateola; Archaeoglobigerina mateola, δ13C; Archaeoglobigerina mateola, δ18O; Counting 125-250 µm fraction; Counting 250-315 µm fraction; Counting 63-125 µm fraction; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Globigerinelloides multispinatus; Globigerinelloides multispinatus, δ13C; Globigerinelloides multispinatus, δ18O; Hedbergella monmouthensis; Hedbergella monmouthensis, δ13C; Hedbergella monmouthensis, δ18O; Heterohelix dentata; Heterohelix dentata, δ13C; Heterohelix dentata, δ18O; Heterohelix globulosa; Heterohelix globulosa, δ13C; Heterohelix globulosa, δ18O; Isotope ratio mass spectrometry; Joides Resolution; Leg113; Mass spectrometer Finnigan MAT 251; Ocean Drilling Program; ODP; Orthopithonella globosa; Orthopithonella globosa, δ13C; Orthopithonella globosa, δ18O; Pirumella krasheninnikovii; Pirumella krasheninnikovii, δ13C; Pirumella krasheninnikovii, δ18O; Rugotruncana circumnodifer; Rugotruncana circumnodifer, δ13C; Rugotruncana circumnodifer, δ18O; Sample code/label; South Atlantic Ocean
Type:
Dataset
Format:
text/tab-separated-values, 125 data points
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