Concentrations of Uranium and Thorium isotopes, IODP Expedition 325

Notes: Uncertainties of concentrations include all weighing errors; isotope ratios are independent of weighing uncertainties. All isotope ratios are expressed as acivities and are calculated using the decay constants of Cheng et al. (2000), Holden (1990), and Jaffey et al. (1971). Depth = top of sample interval备注：浓度的不确定度涵盖所有称量误差；同位素比值与称量不确定度相互独立。所有同位素比值均以活度表示，并基于Cheng等人（2000）、Holden（1990）以及Jaffey等人（1971）提出的衰变常数进行计算。深度指样品层段的顶部位置。