LAUSR

Abstract— Reproducing the geological evolution of the Yenisei Range is important not only to understand how mobile belts at boundaries between ancient cratons tectonically evolved but also to gain an insight into how the Siberian craton was incorporated into the Nuna and Rodinia supercontinents. The paper presents geological, geochemical, and isotope geochronologic evidence of Meso- to Neoproterozoic events in the western margin of the Siberian craton and demonstrates that multiple pulses of intraplate magmatism occurred during the late evolution of the Yenisei Range. The rocks produced by these processes crystallized from high-temperature and hydrous magmas, which were rich in alkalis, iron, and most incompatible elements, as is typical of A-type anorogenic granites in intraplate environments. According to U–Pb zircon and monazite dates, the emplacement age of the granites is constrained between two peaks at 1380–1360 and 800–720 Ma. These magmatic events well correlate with the breakup ages of the Precambrian Nuna and Rodinia supercontinents and provide evidence that the Siberia was close to the North-Atlantic cratons (Laurentia and Baltica) during a long time span starting at 1.38 till 0.72 Ga, which is consistent with modern paleomagnetic reconstructions of the position of the supercontinents and the age spans when LIPS were formed.