Izvestiya of Saratov University.
Earth Sciences
ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)

paleogeography

Reconstruction of the Late Vasyuganian Sedimentation Settings Within the Middle of Group of Fields

The paper deals with the results of complex lithology-facies examination of the UV1 1 layer within the Middle Ob group of fields. It is found that in the area under investigation, the layer was formed in the littoral-marine and shallow-water marine conditions under the effect of waves and currents. A paleogeographic chart has been constructed for the period of the UV1 1 layer generation in the Vasyuganian formation; forecast has been made as to the development of improved reservoir rocks.

Features of Rhythostratigraphy of Halogen Thicker and Paleogeographic Conditions of Potassium-Magnesium Mineralization in the Southwestern Deadlock Part of North-Caspian Halmeic Basin

Provides rhythmostratigraphic characteristic of Lower Permian halogen formations of Western monoclinal part of the North-Caspian halmeic basin. Paleogeographic conditions of accumulation of potassium and magnesium and magnesium deposits in the Volga Monocline and the southern deadlock part that holds Gremyachinskoe deposit and related search sites: Darganovskiy and Ravninniy are considered.

Paleogeographic and Tectonic Environment in the Lower Permian Halogen Formation from the Southeastern Margin of the Russian Plate

The Lower Permian halogen formation within the southeastern margin of the Russian Plate is to be considered a large one in terms of its spatial extent, thickness and completeness of halogen sedimentation development. Examination of the halogen formation has made it possible to construct lithology-facies maps of individual salt-accumulation stages and to determine the spatial migration of the salt-generating basin in time.