№ 3, 2006Download the article
The patterns of magmatism manifestation and geodynamics of the Caucasian region during Jurassic period (Azerbaijan)
Institute of Geology and Geophysics of Azerbaijan National Academy of Sciences, AZ1143, Baku, H.Javid av., 119
The Caucasus branch of Mesotethys in Azerbaijan includes the Geicha-Akerin oceanic basin, Jurassic-Cretaceous island arc with mature continental crust, back-arc, inter-arc and intra-arc depressions; the Tfan suboceanic basin, rift structures, regional faults and seismofocal zones. There has been considered interrelation of these structures and evolution of Jurassic magmatism and tectonic regime of its formation therein. Within the north paleomargin of the Geicha-Akerin ocean basin in the Mesozoic period there was formed volcanoplutonic belt, covering the space between the Caspian sea and the Black Sea. Its south-east margin enters the Lower Kura basin and opens in the water area of the South Caspian basin. The north-west margin which was discovered by deep boring in the Kolkhida basin, widens westwards and enters water areas of the Black Sea deep basin. In both cases there were formed rift structures of the Late Jurassic age with subalkaline magmatic complexes. In the Jurassic and Mesozoic periods in the north paleomargin of the Geicha-Akerin oceanic basin there was formed the Black Sea-Lesser Caucasian-Caspian volcanoplutonic belt. It was a transition zone between the oceanic and continental types of structure of the earth crust and it was a fragment of active continental margins of the Mesozoic age similar to the West-Pacific type.