Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage

Seamounts are ubiquitous topographic units in the global ocean, and their effects on local circulation have attracted great research attention physical oceanography; however, fewer relevant efforts were made geological timescales previous studies. The Caiwei (Pako) Guyot Magellan of western Pacific is a typical seamount oceanographic characteristics been well documented. In this study, we investigate sediment core by geochronological geochemical studies to reveal topography-induce surface-to-bottom linkage. principal results as follows: (1) Two magnetozones recognized MABC–11, which can be correlated Brunhes Matuyama chrons; (2) Elements Ca, Si, Cl, K, Mn, Ti, Fe seven elements with high intensities scanning; (3) Ca intensity tuned ice volume refine age model glacial-interglacial timescales; (4) averaged accumulation rate ~0.73 mm/kyr, agreeing estimate excess 230Th data upper part. Based these results, proxy element Mn derived, whose variability changes deep-water masses timescales. This record also characterized an evident 23-kyr cycle, highlighting direct influence solar insolation deep-sea sedimentary processes. Overall, archives not only intensified abyssal ventilation during interglaciations Pacific, but provide unique window for investigating topography-induced linkage between bottom ocean orbital