Abstract: The Geotectonical Framework of the Romanian Black Sea Shelf and Its Position in the South - East Europe

MOROSANU ION

This paper presents the Romanian Shelf with surrounding areas from a geotectonic point of view.

The existing data suggest that the Romanian shelf area had three main tectonic stages.

The first period began in Triassic and continued until Neocomian; during this period, due to the extensional forces, the opening of a NW-SE oriented rift took place at the boundary between the Moesian Platform in the south and the East European Platform in the north.

In the first stage a large basin formed that occupied nearly the whole Romanian shelf, with the axial zone immediately in the north of the Peceneaga-Camena fault.

The second period which extended during the Albian - Eocene time span, when rift formation slowed. During this period subsidence was less, and the sediment supply was high, circumstances that led to the accumulation of prograding sequences on the basin margins.

The third period corresponded to latest Eocene-early Oligocene showed the change to a compressional regime.

As an effect of the compressional forces reverse faults and thrusts have been generated.

A new element occurs here; namely, the compressional tectonic did not bring new major faults, but old ones changing only the sense and transformation of them into reverse faults, some with a thrust character.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria