The ~(40)Ar/~(39)Ar dating of magmatic activity in the Donbas Fold Belt and the Scythian Platform (Eastern European Craton)

摘要

The Donbas Fold Belt is the compressionally deformed southeasternmost part of the intracratonic late Paleozoic Dniepr-Donets rift basin. It is situated in an intracratonic setting but close to the southern margin of the East European Craton, south of which lies the Scythian Platform. A range of igneous rocks from the Donbas Fold Belt and the Scythian Platform were dated by the ~(40)Ar/~(39)Ar method in order to constrain the ages of magmatic activity in these areas, and compare them. The plateau ages from the south margin of the Donbas Fold Belt vary from 151.4 +-4.7 Ma to 278.1 +- 5.3 Ma, and define three main age groups: Middle-Late Jurassic, Middle-Late Triassic, and Early Permian.