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Conditions of the formation and evolution of the Tjӧrnes Transform Zone on the basis of physical modellingстатья
- Авторы: Grokholsky A.L., Bogoliubskii V.A., Dubinin E.P.
- Журнал: Izvestiya. Physics of the Solid Earth
- Том: 59
- Номер: 2
- Год издания: 2023
- Издательство: Pleiades Publishing, Inc.
- Местоположение издательства: New York, USA
- Первая страница: 267
- Последняя страница: 282
- DOI: 10.1134/S1069351322060040
- Аннотация: Abstract — The Tjornes Transform Zone (TZ) is on the northern margin of Iceland, mostly in the shelf zone.It connects the Kolbeinsey spreading ridge and the Northern Rift Zone (RZ) of Iceland. The zone is complexly structured and comprises several heterochronous sections that evolved in various geodynamic conditions. The geodynamic conditions of the formation and evolution of the Tjornes TZ were reconstructed by means of physical modelling. The models measured the thickness of the model lithosphere, displacement, and the overlapping between the spreading segments. Results of the modelling show that the Tjornes TZ formed successively, in two stages. The first stage was the formation of the general configuration of the area of interaction of the extension centres of the Kolbeinsey Ridge and the Northern RZ of Iceland in the form of a small overlap of the spreading centres with a rotating block between them. At the second stage, one of the formed transtensional fault zones between the spreading centres became the feeder channel for a magma pulse of the Iceland Plume, which led to the formation of the Grimsey Oblique Rift (OR). Standing alone is the Husavik-Flatey fault zone that might have formed under the influence of two at a time spreading segments, with the domination of the more magmatically active Northern Rift Zone.Keywords: Iceland, Iceland Plume, Tjornes Transform Zone, oblique rift, spreading ridges, physical modelling
- Добавил в систему: Дубинин Евгений Павлович