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Atypical Linear Tectonic Block of the Intraplate Deformation Zone in the Central Indian Ocean Basinстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Yutsis V.V., Levchenko O.V., Tevelev A.V., Marinova Y.G., Veklich I.A., Gonzalez A.Del Razo
- Журнал: Journal of Marine Science and Engineering
- Номер: 12
- Год издания: 2024
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Номер статьи: 2231
- Аннотация: The Central Indian Ocean Basin (CIOB) is distinguished by unusually high tectonic activity,setting it apart from all other passive oceanic basins. Within the interior of the Indo-Australianlithospheric plate lies a unique area of intraplate deformation. This region is characterized bythe highest recorded intraplate oceanic seismicity, with earthquake magnitudes reaching up toM = 8, abnormally high heat flow—measured to be two to four times higher than backgroundlevels for the ancient oceanic lithosphere of the Cretaceous age—and, most notably, intense foldingand faulting of sediments and the basement, which are typically associated only with boundaryzones of lithospheric plates. This anomalously tectonically active intraplate area was studied duringregular research cruises in the 1970s–1980s, after which new conclusions were mainly drawn fromsatellite data modeling. Substantially new geophysical data were obtained in 2017 after a long gap.Bathymetric surveys using multibeam echosounders during the 42nd cruise of the R/V (ResearchVessel) Akademik Boris Petrov and the SO258/2 cruise of the R/V Sonne provided full coverageof a large portion of the intraplate deformation area in the CIOB. This confirmed the mosaic-blockstructure of the intraplate deformation zone in the Central Indian Ocean Basin, consisting of numerousisometrically deformed tectonic blocks. A linear block at 0.2–0.6◦ S, which has a branch-like shape inplain view, is morphologically distinct from these blocks. It represents a system of structural elementsof different scales (folds, flexures, ruptures), which constitute a structural paragenesis formed in themechanical environment of a dextral transpressive tectonic setting.
- Добавил в систему: Тевелев Александр Вениаминович