The Late Cretaceous (Cenomanian‒Coniacian) Stage of Rifting in the Northern Part of North Atlantic and Arctic Basin

The apatite fission-track dating ((AFT) method) from sandstones of the Triassic (Anisium‒Norium) age of the Severnaya borehole located on Graham Bell Island of the Franz Josef Land archipelago was performed. The Late Cretaceous age (~ 90 Ma) of the transition from the stage of relative temperature and tectonic stability to the stage of “rapid” exhumation of rocks has been established. The Late Cretaceous (Cenomanian‒Cognacian) stage of rock exhumation is widely manifested in the Arctic basin and its framing and correlates with the stage of magmatism. It is assumed that these events record one of the stages of rifting development in the northern part of the North Atlantic and the Arctic Basin, which is associated with the reorganization of the direction of plate movement in the northern part of the Pacific Ocean.