Dataset supporting the University of Southampton Doctoral Thesis 'Palaeomagnetism of marine sediments from the Japan Sea: insight into the Plio-Pleistocene East Asian Monsoon'

Site U1424 was drilled during International Ocean Discovery Program (IODP) Expedition 346 to the Japan Sea. Anhysteretic Remanent Magnetisation (ARM) and Isothermal Remanent Magnetisation (IRM) were measured on a 2G Enterprises u-channel pass-through liquid-helium-cooled superconducting rock magnetometer (SRM) at the University of Southampton. ARM was acquired in a 100 mT alternating field with a direct current bias field of 50 μT. IRM was imparted using a direct current pulse field of 300 mT at room temperature. Magnetic susceptibility (MS) was measured at 1 cm intervals using a susceptibility track equipped with a Bartington MS3 meter and a 36/40-mm diameter loop sensor. IRM acquisition (IRMacq), hysteresis, and backfield experiments were performed using a Princeton Measurements Corp. (now Lakeshore Inc.) Model 3900 vibrating sample magnetometer (VSM). All results were weight normalised. Coercivity (Bc), Remanent Coercivity (Bcr), Saturation Remanent Magnetisation (Mr), and Saturation Magnetisation (Ms) were also calculated based on these analyses. Physical grain size analysis was conducted on 38 bulk sediment samples using a Laser Coulter Sizer LCS13320. Organic material, calcium carbonate, and biogenic silica were removed before measurement. The instrument analysed grain sizes from 0.1 to 900 µm, with results expressed as volume percent. The exported report from the software showed the median and mean grain size of each sample. All data are accessible in Comma-separated values (csv) files.