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Nature of the Crust in the Southern Part of the Bay of Bengal and the Adjacent Part of the Central Basin (Indian Ocean)статья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
- Авторы: Illarionov V.K., Ganzha O.Yu, Ilyinsky D.A., Burmin V.Yu, Boyko A.N., Roginskiy K.A., Borisova A.Yu
- Журнал: Izvestiya - Atmospheric and Oceanic Physics
- Том: 58
- Номер: 10
- Год издания: 2022
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 1289
- Последняя страница: 1311
- DOI: 10.1134/s0001433822100048
- Аннотация: Based on the data of deep seismic sounding, which were obtained in 2003 on the R/V Mezen in theBay of Bengal, two velocity sections have been constructed that characterize the structure of the crust in itssouthern part. Seismic studies have shown that, in the Bengal sector of the East Indian Ridge (EIR), a subcontinentaltype of crust is developed, the thickness of which reaches 19.5 km. At the western foot of the EIR,the velocity section is represented by a reduced transitional crust 13 km in thickness. Using the NGDS digitizeddatabase of the thickness of the sedimentary cover in the Indian Ocean, which is freely available on theInternet, a map of the depths of the acoustic basement is built which makes it possible to identify the morphologicalfeatures of its structure. A seismostratigraphic analysis is carried out of the structure of the sedimentarycover that has developed (a) on horst blocks grouped at the foot of the western slope of the EIR,(b) on the crest of the EIR, and (c) in the adjacent part of the Central Basin. It is established that, in the LateCretaceous–Paleogene, the Bengal sector of the EIR and horst blocks represented a single platform structure.In the latest phase of tectonic activation, which manifested itself in the late Miocene–Pliocene, the platformwas divided into horst blocks, which experienced differentiated subsidence. It has been established thathorst blocks play the main role in the structure of Ridge 85°. This ridge is not structurally unrelated to theAfanasy Nikitin Rise and, by its nature, is not a “tracer ridge.”
- Добавил в систему: Илларионов Владимир Константинович