Paleorecord Reconstruction of Deep Current in the Central Basin of South China Sea

Magnetic fabric and grain analyses from a sediment core provide paleorecords of deep current in the central basin of South China Sea. The chronostratigraphy of the sediment core is constructed by AMS14C results of foraminifera and the rebuilt relative paleo intensity (RPI) record of earth magnetic field. The data show five records of bottom current enhancement. According to the paleocurrent direction contracted by the anisotropy of magnetic susceptibility (AMS), there are 3 times of NE-SW azimuth deep current enhancement, which occurred in ~104 ka, ~147 ka and ~199 ka separately. These 3 deep current provide records of the North Pacific Deep Water (NPDW) invaded to central basin of South China Sea.