13 Tectonostratigraphy of Ophiolites

Monday, 25 March 2002
2:45 PM - 5:00 PM

GEOPHYSICAL OUTLOOK ON STRUCTURE OF THE ALBANIDES

Paper number: 13-5
Program: SYMPOSIA
Time: 3:50 PM – 4:10 PM

Authors

Abstract

The Albanides represents the part of southern branch of the Mediterranean Folded Alpine Belt in the territory of Albania. In the paper are presented the structural analysis of the Albanides according to the seismological data, reflection seismic, gravity, magnetic, electrical, and geothermal surveys.

Two major peleogeographic domains form the Albanides. The Internal Albanides form part of the Subpelagonian Trough. The External Albanides was developed out of the western passive margin and continental shelf of the Adriatic plate. Regional gravity anomalies and seismological studies are interpreted as caused by the variation of the depth of Moho discontinuity, and a block construction of the crust. The Earth crust in Albanides is interrupted by a system of longitudinal fractures in NW - SE direction and transversal fractures. Intensive Bouger anomalies and turbulent magnetic field with weak anomalies characterize ophiolitic belt of the Internal Albanides. These data show about the allocton character of ophiolites. The relations between the Internal and the External Albanides have a nape character. A joint characteristic of structural belt External Albanides is their westward thrusting, too. Two tectonic styles are observed in the Ionian tectonic zone: duplex and imbricate tectonic. Miocene and Pliocene molasses of Preadriatic Depression cover Western part of Ionian zone.