Physical Modeling of Structure Formation at the Early Stages of the Iberia—Newfoundland Separationстатья
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Дата последнего поиска статьи во внешних источниках: 3 ноября 2021 г.
Аннотация:The features of structure formation on the adjacent margins of Iberia and Newfoundland are con¬sidered based on an analysis of geological and geophysical data and physical modeling. These margins repre¬sent the passive margins formed during hyperextension of continental crust, with its asymmetric breaking up along a large detachment fault and depleted magma supply. This type of margin is characterized by develop¬ment under prolonged rifting extension of the continental crust, which becomes ultraslow-, then slow- spreading. A distinctive feature of the Iberian and Newfoundland margins is the presence of submerged pla¬teaus (Galicia and Flemish Cap), underlain by thinned continental crust separated from the mainland by rift¬ing grabens. Physical modeling of the formation of different types of relief during the transition from conti¬nental rifting to oceanic spreading at varying rates revealed different patterns of structure formation at each stage of development of the adjacent transition zones of Western Iberia and Newfoundland. The experiments showed that the formation of the marginal Galicia plateau is possible in the presence of two rifts moving towards each other.