Fig. 2: Detrital zircon U-Pb age distributions of surface samples from circum-Arctic continental shelves.
From: Arctic zircon U-Pb ages reveal multiphase glaciations in East Siberia during the late Quaternary
Sample locations are shown in Fig. 1. Zircon U-Pb age distributions are illustrated by kernel density plots (KDE) and frequency histograms (see “Methods”). ~90–110 Ma, ~140-160 Ma, ~220–360 Ma, ~420–560 Ma, and ~1750–2000 Ma zircon age peaks are shaded. Each part of the circum-Arctic continental shelf has a distinct zircon age distribution. The western and central Eurasian samples (a–k) lack the ~90–110 Ma peak which is prominent in the East Siberian samples (m–u). The Bering Sea sample (v) has a unique ~60 Ma peak. The North American sample (w) is characterized by 1000–1500 Ma zircons that are absent from all the Eurasian samples (a-u). Hence, the ~90–110 Ma age peak exclusively fingerprints the East Siberian provenance. Source data are provided in Supplementary Data S2.
