Figure 5. Authigenic and detrital206Pb/20⁴Pb ratios vs. eNd at Site PS2644 and potential sediment sources. PS2644 data are symbols indicate different time segments as described in the text. The Holocene sample was derived from a combination of eNd data at the core top and Pb isotope data from an ash layer at 18 cm depth, since the core top appeared to be contaminated by strongly unradiogenic anthropogenic lead. Potential end members are indicated as shaded areas (Crocker et al., 2016; Crocket et al., 2012; Eisenhauer et al., 1999; Fagel et al., 2002; Farmer et al., 2003; Haley et al., 2008; Kempton et al., 2000; Peate and Stecher, 2003; Struve et al., 2019). Data from ODP Site 980 in the Northeast Atlantic are from authigenic sediment fractions only. Greenland isotopic ratios span large ranges outside the limits of the figure.