Stable carbon and oxygen isotope composition of Late Cretaceous benthic foraminifera from the southern South Atlantic ...

• Main Authors: Friedrich, Oliver, Schmiedl, Gerhard, Erlenkeuser, Helmut
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2006
• Subjects: Drilling/drill rig; Leg113; Joides Resolution; Ocean Drilling Program ODP; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.676680; https://doi.pangaea.de/10.1594/PANGAEA.676680

The stable carbon and oxygen isotope composition of different benthic foraminiferal species of the latest Campanian and earliest Maastrichtian from Ocean Drilling Project Hole 690C (Weddell Sea, southern South Atlantic, ~1800 m paleowater depth) have been investigated. The total range of measured isotope values of all samples exceeds ~4 per mil for delta 13C and 1.1 per mil for delta 18O. Carbon isotope values of proposed deep infaunal species are generally similar or only slightly lower when compared to proposed epifaunal to shallow infaunal species. Interspecific differences vary between samples probably reflecting temporal changes in organic carbon fluxes to the sea floor. Constantly lower delta 13C values for Pullenia marssoni and Pullenia reussi suggest the deepest habitat for these species. The strong depletion of delta 13C values by up to 3 per mil within lenticulinids may be attributed to a deep infaunal microhabitat, strong vital effects, or different feeding strategy when compared to other species ... : Supplement to: Friedrich, Oliver; Schmiedl, Gerhard; Erlenkeuser, Helmut (2006): Stable isotope composition of Late Cretaceous benthic foraminifera from the southern South Atlantic: Biological and environmental effects. Marine Micropaleontology, 58(2), 135-157 ...