Abstract
In the Kursk block of Sarmatia, in the interval of 2.1-2.04 Ga, an active reworking of the continental lithosphere took place: (1) subduction with the slab break-off (2.14-2.10 Ga), (2) collision of the volcanic arc - the continent (≈2.09 Ga), (3) postcollision extension and suprasubduction magmatism (2.08-2.07 Ga), (4) continent–continent collision (≈2.07 Ga), (5) post-collision magmatism (2.07-2.04 Ga). The SIMS zircon age values from 2.08 to 2.05 Ga for granodiorite magmatism indicated a postcollision extension. The zircon and titanite TIMS dating showed that their intrusion occurred at 2.08-2.07 Ga before the collision of Sarmatia and Volgouralia in a suprasubduction setting.
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