Свидетельства сейсмических событий на побережье Мурмана в позднеледниковье и голоцене (северо-восток Балтийского щитастатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 октября 2020 г.
Аннотация:The article reviews the seismogenic deformations («seismites», or «soft-sediment deformations») preserved in the Late Pleistocene-Holocene loose sedimentations of the 65-km-long zone adjacent to the Kola fjord, a structure with one of the active-most seismicity at the Murman coast (NE Baltic shield). The soft-sediment deformations have been revealed in different (glasiofluvial, glaciomarine, glaciolacustrine, lacustrine) genetic types of sediments and studied in cross-sections of several basic sites. The deformations manifest convolute laminae, flame structures, water escape structures, diaper-like injections, sandstone microdykes, «fault-graded beds». They may have formed in result of various processes, but the presence of different types of structure in one horizon, their relation with active faults, origination during the same time span (9000-10500 years ago) and sedimentation preconditions testify to their seismogenic genesis. The obtained data specify the high seismic activity of the Murmansk coast zone during the Late-glacial and Early Holocene.