5:15 PM - 6:30 PM
[MIS17-P28] Multi-elemental data structure of the Indian Ocean deep-sea sediments recording the early Eocene hyperthermals
Keywords:deep-sea sediment, Indian Ocean, climate change, hyperthermals, Independent Component Analysis
Here we have constructed a comprehensive geochemical data set including major- and trace-element contents, δ13C, and CaCO3 contents of 250 bulk sediment samples taken from ODP Sites 738 and 752, both located in the Indian Ocean. The analytical results show that the sediments of these cores record multiple carbon isotope excursions and reductions of carbonate contents, probably corresponding to the PETM and some of the early Eocene hyperthermals. We apply Independent Component Analysis to the compositional data matrix, and describe the fundamental structure of the multi-elemental data set on the basis of the extracted geochemical independent components.