(Table S3) Benthic foraminiferal Mg/Ca, Li/Ca and stable isotope ratios of ODP Site 122-761 ...

• Main Authors: Lear, Caroline H, Mawbey, Elaine M, Rosenthal, Yair
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: AGE; Oridorsalis umbonatus, Lithium/Calcium ratio; Oridorsalis umbonatus, Magnesium/Calcium ratio; Size fraction > 0.063 mm, sand; Δ carbonate ion content; Bottom water temperature; Cibicidoides mundulus, δ18O; Cibicidoides mundulus, δ13C; δ18O; Composite Core; Inductively coupled plasma - mass spectrometry ICP-MS; Calculated moving averages; Grain size, sieving; Calculated; Mass spectrometer Finnigan MAT 252; Leg122; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctic; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.831022; https://doi.pangaea.de/10.1594/PANGAEA.831022

The sensitivities of benthic foraminiferal Mg/Ca and Li/Ca to bottom water temperature and carbonate saturation state have recently been assessed. Here we present a new approach that uses paired Mg/Ca and Li/Ca records to calculate simultaneous changes in temperature and saturation state. Using previously published records, we first use this approach to document a cooling of deep ocean waters associated with the establishment of the Antarctic ice sheet at the Eocene-Oligocene climate transition. We then apply this approach to new records of the Middle Miocene Climate Transition from ODP Site 761 to estimate variations in bottom water temperature and the oxygen isotopic composition of seawater. We estimate that the oxygen isotopic composition of seawater varied by ~1 per mil between the deglacial extreme of the Miocene Climatic Optimum and the glacial maximum following the Middle Miocene Climate Transition, indicating large amplitude variations in ice volume. However, the longer-term change between 15.3 and ... : Supplement to: Lear, Caroline H; Mawbey, Elaine M; Rosenthal, Yair (2010): Cenozoic benthic foraminiferal Mg/Ca and Li/Ca records: Toward unlocking temperatures and saturation states. Paleoceanography, 25(4), PA4215 ...