Geochronological Evidence Inferring Carbonate Compensation Depth Shoaling in the Philippine Sea after the Mid-Brunhes Event

Carbonate compensation depth (CCD) is an important factor in the global deep ocean and carbon cycling; however, its variabilities have not been well documented previous studies. In this study, we investigate two deep-sea cores collected from Philippine Sea terms of geochronology geochemical properties over past ~900 kyr. The principle results are as follows: (1) Two magnetozones determined sediment’s magnetic records, which can be correlated with Brunhes Matuyama chrons geomagnetic polarity timescale. (2) age models refined by tuning Ba Sm intensities studied to ice volume, estimated sediment accumulation rate ~4 mm/kyr. (3) Chalky mud bulk δ13C record vary abruptly at ~430 ka imply 200 m shoaling CCD. Based on these results, a close link inferred between marine productivity, aeolian dust, CCD changes, major change that occurred during Mid-Brunhes Event. Therefore, propose sedimentary processes evidence climate change, providing unique window observe interactions various environmental systems.