Fig. 4: Detrital zircon U–Pb age distributions of sand-rich layers from cores LV90-8-1 and LV90-9-1, with multidimensional scaling (MDS) plots comparing core and surface samples.
From: Arctic zircon U-Pb ages reveal multiphase glaciations in East Siberia during the late Quaternary
Sample positions are marked in Fig. 3. Zircon U-Pb age peaks of ~90-110 Ma, ~140-160 Ma, ~220–360 Ma, 420–560 Ma and ~1750–2000 Ma are shaded in the zircon age distribution. The age peak of ~90–110 Ma occurs in the ice-rafted debris (IRD) samples of late GP 1 (a), post GP 2 (c), late GP 4 (e, f) and late GP 6 (h, i), suggesting East Siberian origin. ~90–110 Ma zircons are scarce in the IRD samples from late IGP 2 (b) and middle GP 6 (j), as well as in the two turbidite samples from late GP 3 (d) and late GP 5 (g). Sample numbers of surface and core samples in the MDS plots correspond to those shown in Figs. 1–3. MDS plots were generated in (https://isoplotr.es.ucl.ac.uk/). Source data are provided in Supplementary Data S2.
