Stable carbon and oxygen isotope ratios of bulk sediment, planktonic and benthic foraminifera of the Cenomanian/Turonian section of DSDP Hole 80-551 in the Northeast Atlantic (Table 1) ...

• Main Authors: Gustafsson, Mikael, Holbourn, Ann E, Kuhnt, Wolfgang
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: DEPTH, sediment/rock; Sample code/label; δ13C, carbonate; δ18O, carbonate; δ13C; δ18O; Whiteinella aprica, δ13C; Whiteinella aprica, δ18O; Whiteinella archaeocretacea, δ13C; Whiteinella archaeocretacea, δ18O; Dicarinella hagni, δ13C; Dicarinella hagni, δ18O; Hedbergella delrioensis, δ13C; Hedbergella delrioensis, δ18O; Rotalipora cushmani, δ13C; Rotalipora cushmani, δ18O; Rotalipora greenhornensis, δ13C; Rotalipora greenhornensis, δ18O; Gyroidinoides lenticulus, δ13C; Gyroidinoides lenticulus, δ18O; Tappanina laciniosa, δ13C; Tappanina laciniosa, δ18O; Drilling/drill rig; DSDP/ODP/IODP sample designation; Mass spectrometer Finnigan MAT 251; Leg80; Glomar Challenger; Deep Sea Drilling Project DSDP; Northeast Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.695358; https://doi.pangaea.de/10.1594/PANGAEA.695358

Stable isotopes of bulk sediment and well preserved tests of planktonic and benthic foraminifera from midlatitude NE Atlantic DSDP Site 551 (Goban Spur) provide the first estimates of carbon isotope gradients within the water column at a lower bathyal site during the Cenomanian/Turonian boundary interval (CTBI). The CTBI carbon isotope excursion is prominent (up to 2‰ shift in delta13C) in the bulk (coccolith) signal, but less pronounced (approximately 0.5‰ shift in delta13C) in planktonic and benthic foraminifera. This difference indicates a very steep 13C gradient in the upper water column and a very efficient biological pump during the CTBI carbon isotope excursion. We suggest significantly increased seasonal primary production in the uppermost water column with an enhanced shallow water chlorophyll maximum as a cause for this steep carbon isotope gradient. Deep-water and surface-water temperature changes during the CTBI are estimated using benthic and planktonic foraminiferal oxygen isotopes. Warm ... : Supplement to: Gustafsson, Mikael; Holbourn, Ann E; Kuhnt, Wolfgang (2003): Changes in Northeast Atlantic temperature and carbon flux during the Cenomanian/Turonian paleoceanographic event: the Goban Spur stable isotope record. Palaeogeography, Palaeoclimatology, Palaeoecology, 201(1-2), 51-66 ...