11:30 AM - 11:45 AM
[SCG56-10] Extended lateral correlation of deep-sea sediments around the Minamitorishima EEZ based on downhole variation of bulk chemical composition
Keywords:REY-rich mud, chemostratigraphy, Minamitorishima Island, pelagic clay
Based on a careful consideration of a large geochemical dataset, we have recently recognized that deep-sea sediments within the Minamitorishima EEZ can be divided into nine types of stratigraphic layers, including three distinct REY peaks, with characteristic chemical compositions . These layers deposited in a specific sequence and have lateral continuity in the Minamitorishima EEZ , which enables us to correlate the REY peaks in different cores.
In this study, we newly applied the chemostratigraphy to the piston core samples around the Minamitorishima EEZ collected by the MR16-07 cruise. The multi-elemental analysis suggests that the chemostratigraphy spreads out of the Minamitorishima EEZ and reaches at least ~500 km southeast of Minamitorishima Island.
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