Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures
New geophysical models of the Earth's crust were used to study the possible nature of the Pacific Margin Anomaly (PMA) near the Antarctic Peninsula (AP). The data have been presented, which permitted analyzing spatial distribution of PMA and its deep sources on the continental margin of AP. Wes...
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| Дата: | 2017 |
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| Формат: | Стаття |
| Мова: | rus |
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Subbotin Institute of Geophysics of the NAS of Ukraine
2017
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| Назва журналу: | Geofizicheskiy Zhurnal |
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journalsuranua-geofizicheskiy-article-1040362020-10-07T11:15:07Z Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures Soloviev, V.D. Korchagin, I.N. Antarctic Peninsula crust Pacific Margin anomaly sources of magnetic anomalies geodynamics New geophysical models of the Earth's crust were used to study the possible nature of the Pacific Margin Anomaly (PMA) near the Antarctic Peninsula (AP). The data have been presented, which permitted analyzing spatial distribution of PMA and its deep sources on the continental margin of AP. Western and Eastern PMA-branches may correspond to different crustal blocks associated with predominantly Cretaceous magmatic intrusions of basic rocks. These branches of PMA were formed in the Early Cretaceous in structures, separated by a fault zone. Spatial heterogeneity of different segments of РМА may also be connected with different depth, thickness and magnetic susceptibility of separate bodies, which form the sources of regional anomalies. Active tectonic processes in the Mesozoic—Cenozoic resulted in the complex evolution of the structures of the region and appearance of vast deep magnetic sources of PMA along the AP margin formed during the phases of magmatic activity. Formation of separate segments of PMA can be connected with processes of tectonic movements near the border of the plates (Antarctica and Scotia) as well as in the areas of paleorifts formation. New geophysical results for different PMA-segments (from the Palmer Land to Powell Basin) replenish current ideas on the sources and origin of this big positive magnetic anomaly of the Pacific coast and show the necessity of searching new mechanisms of forming the structures of continental margin of AP Subbotin Institute of Geophysics of the NAS of Ukraine 2017-06-22 Article Article application/pdf https://journals.uran.ua/geofizicheskiy/article/view/104036 10.24028/gzh.0203-3100.v39i3.2017.104036 Geofizicheskiy Zhurnal; Vol. 39 No. 3 (2017); 76-90 Геофизический журнал; Том 39 № 3 (2017); 76-90 Геофізичний журнал; Том 39 № 3 (2017); 76-90 2524-1052 0203-3100 rus https://journals.uran.ua/geofizicheskiy/article/view/104036/195732 Copyright (c) 2020 Geofizicheskiy Zhurnal https://creativecommons.org/licenses/by/4.0 |
| institution |
Geofizicheskiy Zhurnal |
| collection |
OJS |
| language |
rus |
| topic |
Antarctic Peninsula crust Pacific Margin anomaly sources of magnetic anomalies geodynamics |
| spellingShingle |
Antarctic Peninsula crust Pacific Margin anomaly sources of magnetic anomalies geodynamics Soloviev, V.D. Korchagin, I.N. Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures |
| topic_facet |
Antarctic Peninsula crust Pacific Margin anomaly sources of magnetic anomalies geodynamics |
| format |
Article |
| author |
Soloviev, V.D. Korchagin, I.N. |
| author_facet |
Soloviev, V.D. Korchagin, I.N. |
| author_sort |
Soloviev, V.D. |
| title |
Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures |
| title_short |
Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures |
| title_full |
Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures |
| title_fullStr |
Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures |
| title_full_unstemmed |
Magnetic anomalies and the features of geodynamic development of the Antarctic Peninsula continental margin structures |
| title_sort |
magnetic anomalies and the features of geodynamic development of the antarctic peninsula continental margin structures |
| description |
New geophysical models of the Earth's crust were used to study the possible nature of the Pacific Margin Anomaly (PMA) near the Antarctic Peninsula (AP). The data have been presented, which permitted analyzing spatial distribution of PMA and its deep sources on the continental margin of AP. Western and Eastern PMA-branches may correspond to different crustal blocks associated with predominantly Cretaceous magmatic intrusions of basic rocks. These branches of PMA were formed in the Early Cretaceous in structures, separated by a fault zone. Spatial heterogeneity of different segments of РМА may also be connected with different depth, thickness and magnetic susceptibility of separate bodies, which form the sources of regional anomalies. Active tectonic processes in the Mesozoic—Cenozoic resulted in the complex evolution of the structures of the region and appearance of vast deep magnetic sources of PMA along the AP margin formed during the phases of magmatic activity. Formation of separate segments of PMA can be connected with processes of tectonic movements near the border of the plates (Antarctica and Scotia) as well as in the areas of paleorifts formation. New geophysical results for different PMA-segments (from the Palmer Land to Powell Basin) replenish current ideas on the sources and origin of this big positive magnetic anomaly of the Pacific coast and show the necessity of searching new mechanisms of forming the structures of continental margin of AP |
| publisher |
Subbotin Institute of Geophysics of the NAS of Ukraine |
| publishDate |
2017 |
| url |
https://journals.uran.ua/geofizicheskiy/article/view/104036 |
| work_keys_str_mv |
AT solovievvd magneticanomaliesandthefeaturesofgeodynamicdevelopmentoftheantarcticpeninsulacontinentalmarginstructures AT korchaginin magneticanomaliesandthefeaturesofgeodynamicdevelopmentoftheantarcticpeninsulacontinentalmarginstructures |
| first_indexed |
2024-04-21T19:39:33Z |
| last_indexed |
2024-04-21T19:39:33Z |
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