Crustal Structure, Tectonic Subsidence, and Lithospheric Stretching of the Princess Elizabeth Trough Basin, East Antarctica
- Авторы: Leitchenkov G.1,2, Galushkin Y.3, Guseva Y.4, Gandyukhin V.4, Dubinin E.3
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Учреждения:
- Gramberg Research Institute for Geology and Mineral Resources of the World Ocean
- Institute of Earth Sciences, St. Petersburg State University
- Museum of Natural History, Moscow State University
- Polar Marine Geosurvey Expedition
- Выпуск: Том 53, № 6 (2019)
- Страницы: 726-737
- Раздел: Article
- URL: https://journals.rcsi.science/0016-8521/article/view/156872
- DOI: https://doi.org/10.1134/S0016852119060074
- ID: 156872
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Аннотация
This paper considers the crustal structure, seismic stratigraphy, thermal evolution, and lithospheric stretching of the deep-water basin located on the East Antarctic passive margin in the Princess Elizabeth Trough. Seven of Middle Jurassic to Quaternary seismic sequences were identified based on interpretation of multichannel seismic data. The information about seismic stratigraphy and crustal thickness (calculated from gravity data) along the section crossing the Princess Elizabeth Trough was used for numerical modeling of the thermal regime of the lithosphere, tectonic subsidence of the crystalline basement, and lithospheric stretching. Modeling shows that calculated tectonic subsidence is possible only under the assumption of crustal extension before the deposition (during crustal doming at the early rift phase). The maximum stretching factor in the basin ranges from 1.1 to 2.0 for the period that preceded the deposition and 2.8 for the period of rift-related deposition.
Об авторах
G. Leitchenkov
Gramberg Research Institute for Geology and Mineral Resources of the World Ocean; Institute of Earth Sciences, St. Petersburg State University
Автор, ответственный за переписку.
Email: german_l@mail.ru
Россия, St. Petersburg, 190121; St. Petersburg, 199034
Yu. Galushkin
Museum of Natural History, Moscow State University
Email: german_l@mail.ru
Россия, Moscow, 119991
Yu. Guseva
Polar Marine Geosurvey Expedition
Email: german_l@mail.ru
Россия, St. Petersburg, 198412
V. Gandyukhin
Polar Marine Geosurvey Expedition
Email: german_l@mail.ru
Россия, St. Petersburg, 198412
E. Dubinin
Museum of Natural History, Moscow State University
Email: german_l@mail.ru
Россия, Moscow, 119991