Basites of the Vilyui paleorift: geochemistry and sequence of intrusive events

We present results of study of the basites of the Vilyui paleorift. Their 40Ar/39Ar isotopic ages were used to establish the sequence of their intrusion, which lasted ~ 18 Myr. Dolerite sills of the Kontai–Dzherba zone were the first crystallizing phase (378.0–380.7 Ma), which was followed by the intrusion of dikes of the Vilyui–Markha zone (372–373 Ma). Dikes of the Chara–Sinsk zone were the last crystalizing phase (362–364 Ma). The prolonged...