Detrital Zircon of the Lower Cretaceous Egilknyveem Formation of West Chukotka and Provenance of Terrigenous Material during Collision of the Chukotka Terrane and Eurasia

The work presents the first results of U–Pb dating of detrital zircons from sandstones of the Egilknyveem Formation, which occurs in the basement of post-collision Tytylveem volcanic depression. The U–Pb age of the youngest population of detrital zircons is 140.7 ± 2.2 Ma. The young zircon populations (190–130 Ma) in the Late Jurassic–Early Cretaceous sandstones are likely related to the activity of a supra-subduction magmatic belt of the southern margin of the Chukotka microcontinent.