ANTASed – An Updated Sediment Model for Antarctica

Baranov, A.; Morelli, A.; Chuvaev, A.

Авторы: Baranov A., Morelli A., Chuvaev A.
Журнал: FRONTIERS IN EARTH SCIENCE
Том: 9
Год издания: 2021
Издательство: Frontiers Media S.A.
Местоположение издательства: Lausanne, Switzerland
Первая страница: 1
Последняя страница: 10
DOI: 10.3389/feart.2021.722699
Аннотация: We compile existing seismic, gravity, radar and magnetic data, together with the subglacialbedrock relief from the BEDMACHINE project, to build the most detailed sediment modelfor Antarctica. We interpolate these data according to a tectonic map of Antarctica using astatistical kriging method. Our results reveal significant sediment accumulation inAntarctica with several types of sedimentary basins: parts of the Beacon Supergroupand more recent rifting basins. The basement relief closely resembles major geological andtectonic structures. The thickness of sediments has significant variations around thecontinent, and depends on the degree of crustal extension. West Antarctica has widesedimentary basins: the Ross basin (thickness 2–6 km), the Filchner-Ronne basin(2–12 km) with continuations into East Antarctica, the Bentley Subglacial Trench andthe Byrd basin (2–4 km). The deepest Filchner-Ronne basin has a complex structure withmulti-layered sediments. East Antarctica is characterized by vast sedimentary basins suchas the Pensacola-Pole (1–2 km), Coats Land (1–3 km), Dronning Maud Land (1–2 km),Vostok (2–7 km), Aurora (1–3 km), Astrolabe (2–4 km), Adventure (2–4 km), and Wilkes(1–4 km) basins, along with narrow deep rifts filled by sediments: JutulStraumen (1–2 km),Lambert (2–5 km), Scott, Denman, Vanderford and Totten (2–4 km) rifts. The averagethickness of sediments for the whole continent is about 0.77 km. The new model,ANTASed, represents a significant improvement over CRUST 1.0 for Antarctica, andreveals new sedimentary basins. Differences between ANTASed and CRUST 1.0reach +12/−3 km.
Добавил в систему: Баранов Алексей Андреевич

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Интеллектуальная Система Тематического Исследования НАукометрических данных

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