000310262 001__ 310262
000310262 005__ 20251007173213.0
000310262 0247_ $$aG:(GEPRIS)49148530$$d49148530
000310262 035__ $$aG:(GEPRIS)49148530
000310262 040__ $$aGEPRIS$$chttp://gepris.its.kfa-juelich.de
000310262 150__ $$aDevelopment of Late Miocene Delta 13C stratigraphy and assessment of changes in global ice volume and deep-water circulation (6-12 Ma, Site 1237; Leg 202)$$y2007 - 2012
000310262 371__ $$aDr. Arne Sturm
000310262 450__ $$aDFG project G:(GEPRIS)49148530$$wd$$y2007 - 2012
000310262 5101_ $$0I:(DE-588b)2007744-0$$aDeutsche Forschungsgemeinschaft$$bDFG
000310262 550__ $$0G:(GEPRIS)5459347$$aSPP 527: Bereich Infrastruktur - International Ocean Drilling Programme³ (IODP³)$$wt
000310262 680__ $$aThe goal is to expand the astronomically calibrated benthic isotope stratigraphy into the Miocene and to examine changes in global ice-volume and deep-water circulation (6-12 Ma). Oxygen isotope stratigraphy is the primary tool for dating marine sedimentary sequences of the last 5 Ma. Recently, Tiedemann, Sturm, et al. (in press) demonstrated that the extension of the established benthic Delta18O stratigraphy (0-5.3 Ma) into the Miocene is hampered by the fact that the structure of globally distributed oxygen isotope records is different over long time intervals and thus provides no global signal - lacking the major precondition for expanding the oxygen isotope stratigraphy. Instead, we identified the benthic Delta l3C-signal as an alternative and a powerful tool to develop an astronomically calibrated stratigraphy for the late Miocene, as the structure and cyclic changes in 6I3C revealed a global response to climate change. We selected the sediment record from Leg 202 site 1237 as particularly suitable because it is the only marine site that meets nearly all critera of providing a complete Neogene reference section by integrating the excellent framework of both magnetostratigraphy and biostratigraphy into an orbitally tuned isotope stratigraphy. Superimposed on orbital controlled variations in Delta13C are trends on tectonic time scales that will provide new insights into changes in deep-water circulation including basin-related fractionations in nutrient distributions.
000310262 909CO $$ooai:juser.fz-juelich.de:977137$$pauthority$$pauthority:GRANT
000310262 909CO $$ooai:juser.fz-juelich.de:977137
000310262 980__ $$aG
000310262 980__ $$aAUTHORITY