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Lithological Characteristick of loess rochs south of the European part of Russiaтезисы доклада
- Автор: Sedaeva Calina M.
- Сборник: Сучаснi проблемi литологii бассенiв Украiни та сумiжних територii: Збiрник матерiалiв науковоi конференцii. 24-26 вересня 2018, Киiв, Украiна
- Тезисы
- Год издания: 2018
- Место издания: IГН НАН Украiни Киiв
- Первая страница: 58
- Последняя страница: 58
- Аннотация: Loess formations are loesses, loess-like rocks and related to them paleosoils that form loess-soil complexes (LSC). Lithologically LSC correspond to sedimentary-eolian cyclites. In which there are two stages: ascending, progressive (sedimentation) and descending, regressive (weakening of the dynamic of the environment, following erosion with a development of a horizon of paleosoils). The main component in allothigenic part of LSC is quartz, in a less degree (in 2-3 times) Ca-Na and potassic feldspars, lesser clay minerals. By content of quartz above 65% it is defined to be the typical loess of eolian (wind-laid) genesis, and less than 65% - loess-like rocks which forming, to a grater or lesser degree related to water. These loess-like layers of deluvial-proluvial, alluvial, in deltas and of costal-marine origin, with following dispergation during frost weathering (cryo-hypergenesis), with elevated amount of clay minerals in them. Based on the results of granulometric and mineralogic analyses there are clayiness “granulometric” and clayiness “mineralogic” have been determined. However, “granulometric clayiness” of rocks of LSC is higher by 2,4-28%, comparing to the data of mineralogical analysis due to the presence of finely-dispersed particles of carbonaceous, sulphate and other compositions, which was pointed out by many researches.
- Добавил в систему: Седаева Куляш Мусабековна