ANTI-CAUCASIAN FOLDING OF KURINSKO-SOUTH-CASPIAN DEPRESSION (the southern part of the Caspian sea and Pre-Malocaucasus trough are taken as an example)
South-Caspian depression (SCD) happens to be the most deeply-submerged sedimentary basin in the world and fully occupies the southern deep-water part of the Caspian sea as well as Kurinsky and West-Turkmenian depressions adjacent to it from the west and east. South-Caspian depression (SCD) has the thinnest (6-8 km) consolidated crust of oceanic type and the thickest (25-30 km) sedimentary cover. The thickness of Pliocene-quaternary deposits makes 10-12 km, while the thickness of only main oil and gas bearing complex of low Pliocene, namely, red colored productive thickness is of 7-8 km. Over 6 km of volcanogenic-sedimentary deposits were accumulated within the limits of Pre-Malocaucasus trough during the Mesozoic period, however, visible pre-Jurassic basement of north-eastern orientation formed similar orientation of overlying deposits in the western part of the trough. All above-mentioned events took place in compression conditions in the northern part of South-Caspian depression (SCD), which were realized either by subduction process in case of consolidated crust or by structural-forming process at the level of sedimentary cover. Initial migration transfers into lateral one out of submersed zones into uplifted zones. Deep fractures, which formed transverse folding, can supply migration ways as well. Submersed, mainly gas bearing zone of productive thickness deposits is represented by folding of both Caucasian and anti-Caucasian extensions. Despite the fact that at present Kurinsko-South-Caspian depression comprises the territory from Dzirulsky massive in the west through Western-Turkmen depression in the east as single negative structural element, in the Mesozoic period, as can be concluded from the above-said, it consisted of two independent areas of deflection and sediments accumulation, entering Transcaucasian micro-continent (the western part) and Big Caucasus-South-Caspian rifting basin (the eastern part). That is why anti-Caucasus folding of Kurinsko-South-Caspian depression is of different genesis and, correspondingly, different oil and gas bearing potential.