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.