par MARIUS VISARION, MIRCEA SANDULESCU,
VLADIMIR ROSCA, DUMITRU STANICA, LIGIA ATANASIU,
Institut de Géologie et Géophysique, Bucarest
Dobrogea is an elevated area within the Carpathian Foreland, where parts
of two major units crop out: the North Dobrogea Orogen and the Moesian Platform.
They are separated by the Peceneaga – Camena transcrustal fracture, which
shows actually dextral strike-slip movements.
North Dobrogea Orogen is the westernmost part of an Early Alpine or Cimmerian
Folded Belt, Several nappes (Macin, Consul, Niculitel, Tulcea) of Jurasic or
Necomian ages have been there recognized: they have a North or North – East
vergency, toward the Seythian Platform, Eastward the North Dobrogea structures
extend throughout the Western Black continental shelf and may be correlated
with those of the South Crimeea.
The Dobrogean area of the Moesian Platform is situated between the crustal
fractures Peceneaga – Camena northside and the Intramoesian one, southside.
In the Central Dobrogea, where the folded basement (Altân – Tepe
and Green Shists Series) crops out, the magnetotelluric soundings relieved
a reference electrical horizon at a depth of 3 – 6 km, which is supposed
to represent the lower boundary of the Green Shists Series. The basement of
these series should be similar with the Arhaic Gneissic Series, known from
drillings at Palazu Mare. The Moesian Platform extend in the Black Sea continental
plateau. A series of major transcurrent fractures reported in the marine realm,
could be connected to the splitting of the platform in the area where the granitic
layer is missing.
Key words: dextral strike-slip movements, magnetotelluric sounding, transcurrent
fracture.