The concept of the Pripyat Trough tectonogenesis is considered below. It is
based on the formation of some plume-fluid energetic source tan asthenosph
eric lense) which was formed in the asthenosphere beneath an ancient suture
zone. Energy of the source is mainly spent for transformation of the subst
ance in the lower part of the lithosphere into plastic state and also for f
ormation of a basalt layer of melts at the level of eclogitisation; Stages
of the Pripyat Trough formation are distinguished. Gravity field curves are
shown for each stage. Described gravity field paleodynamics complicated ch
anges of the field during the Trough formation.