(Table 2) Strontium isotope ratios and age estimations of ODP Hole 120-748B on the Kerguelen Plateau, Indian Ocean@en

Original 87Sr/86Sr data are from Zachos et al. (1999) data set: doi:10.1594/PANGAEA.695370. The 87Sr/86Sr ratios were normalized to NIST-987= 0.710248 (McArthur et al., 2001) by adjusting the values for Hole 748B by adding 4*10**-6. The 2 sigma values of Zachos et al. (1999) were adjusted to a minimum of 14 to reflect the maximum precision for multiple runs of the NIST-987 Sr standard. Ages were determined for the 87Sr/86Sr values using the look-up tables of McArthur et al. (2001). Minimum and maximum ages were determined using the 2sigma uncertainties and the look-up tables.原始87Sr/86Sr数据源自扎科斯等人（Zachos et al.）1999年的数据集，其DOI为10.1594/PANGAEA.695370。为将87Sr/86Sr比值标准化至NIST-987=0.710248（麦克阿瑟等人，2001），研究人员对748B钻孔的测定值进行了校正，具体为追加4×10^-6的校正量。针对扎科斯等人1999年数据中的两倍标准偏差（2σ）值，将其调整至最小值14，以匹配NIST-987锶标准物质多次测定的最高精密度。基于87Sr/86Sr比值，通过麦克阿瑟等人2001年提出的查表法计算得到对应年龄；结合2σ不确定度与该查表法，进一步确定了年龄的最小值与最大值。