GeoActa Special Publication 1
2008
Acquisto online |
GeoActa
an international Journal of Earth Sciences
|
|
Dmitry A. Ruban
Correspondence address: P.O. Box 7333, Rostov-na-Donu, 344056, Russian Federation. Institutional address: Department of Mineralogy and Petrography, Geology and Geography Faculty, Southern Federal University, Zorge Street 40, Rostov-na-Donu 344090, Russian Federation. E.mail: ruban-d@mail.ru, ruban-d@rambler.ru
|
|
Spatio-temporal patterns of the major Bathonian (Middle Jurassic) hiatus in the Greater Caucasus Basin (Northern Neo-Tethys Ocean) and its enigmatic origin
|
|
|
|
PDF (537 KB)
|
Abstract
In the Middle Jurassic, the Greater Caucasus Basin, which lay on the northern active margin of the Neo-Tethys Ocean, experienced a significant break in sedimentation of an unclear nature. An analysis of stratigraphic records permits to establish that the major hiatus embraced a significant part of the noted basin. The maximal spatial extent of the hiatus was reached synchronously in the middle Bathonian. The sedimentation break expanded from the western and central parts of the basin across its northwen periphery through the early-middle Bathonian, although some narrow area remained covered by the sea. The origin of this major hiatus was linked with the minor compressional phase resulted from the tectonic stacking of the Northern Transcaucasian Arc and the Southern Transcaucasian Arc at the margin of the Russian Platform. The global eustatic fall might also contribute to the non-deposition as well as some marginal uplift. Results of this study indicate that the Greater Caucasus Basin appeared in the Callovian, and it included the fragments of the pre-existed Northern Proto-Greater Caucasus Basin and the Southern Proto-Greater Caucasus Basin.
Keywords: Hiatus, Palaeogeography, Collision, Bathonian, Greater Caucasus Basin
|
|
|