Stable carbon and oxygen isotope ratios of benthic and planktonic foraminifera of ODP Hole 171-1049C ...

• Main Authors: Erbacher, Jochen, Huber, Brian T, Norris, Richard D, Markey, Molly
• Format: Dataset
• Language: English
• Published: PANGAEA 2000
• Subjects: Sample code/label; DEPTH, sediment/rock; Hedbergella aff. trocoidea, δ13C; Hedbergella aff. trocoidea, δ13C, standard deviation; Hedbergella aff. trocoidea, δ18O; Hedbergella aff. trocoidea, δ18O, standard deviation; Hedbergella speetonensis, δ13C; Hedbergella speetonensis, δ13C, standard deviation; Hedbergella speetonensis, δ18O; Hedbergella speetonensis, δ18O, standard deviation; Osangularia schloenbachi, δ13C; Osangularia schloenbachi, δ13C, standard deviation; Osangularia schloenbachi, δ18O; Osangularia schloenbachi, δ18O, standard deviation; Gyroidinoides nitidus, δ13C; Gyroidinoides nitidus, δ13C, standard deviation; Gyroidinoides nitidus, δ18O; Gyroidinoides nitidus, δ18O, standard deviation; Drilling/drill rig; DSDP/ODP/IODP sample designation; Isotope ratio mass spectrometry; Leg171B; Joides Resolution; Ocean Drilling Program ODP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.769750; https://doi.pangaea.de/10.1594/PANGAEA.769750

Ocean anoxic events were periods of high carbon burial that led to drawdown of atmospheric carbon dioxide, lowering of bottom-water oxygen concentrations and, in many cases, significant biological extinction (Arthur et al., 1990; Erbacher et al., 1996, doi:10.1130/0091-7613(1996)024<0499:EPORAO>2.3.CO;2; Kuypers et al., 1999, doi:10.1038/20659; Jenkyns, 1997; Hochuli et al., 1999, doi:10.1130/0091-7613(1999)027<0657:EOHPAC>2.3.CO;2). Most ocean anoxic events are thought to be caused by high productivity and export of carbon from surface waters which is then preserved in organic-rich sediments, known as black shales. But the factors that triggered some of these events remain uncertain. Here we present stable isotope data from a mid-Cretaceous ocean anoxic event that occurred 112 Myr ago, and that point to increased thermohaline stratification as the probable cause. Ocean anoxic event 1b is associated with an increase in surface-water temperatures and runoff that led to decreased bottom-water ... : Supplement to: Erbacher, Jochen; Huber, Brian T; Norris, Richard D; Markey, Molly (2000): Increased thermohaline stratification as a possible cause for an ocean anoxic event in the Cretaceous period. Nature, 409(6818), 325-327 ...