The Neotectonic Structure of Deception Island (Antarctica) Inferred from the Results of Structural and Geomorphic Analysisстатья
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Дата последнего поиска статьи во внешних источниках: 27 апреля 2022 г.
Аннотация:We present the results of analysis of the Strombolian-type Deception volcano after its explosivecaldera-forming eruption. The volcano studied, located in the South Shetland Archipelago (Antarctica), wasselected in accordance with the “Strategy for the Development of the Russian Federation Activities in Antarcticafor the Period until 2020 and for the Long-term Period until 2030.” On the basis of original structural–geomorphic constructions and literature data, the location of volcano is substantiated, the modern tectonicstructure of volcano is revealed, and the influence of geodynamic settings in adjacent regions on the evolutionof the volcano is assessed. We applied the structural–geomorphic method, which is developed by the nationalscientific school and successfully tested in practice. The initial materials were topographic and bathymetricmaps of various scales, satellite and ground-penetrating-radar images, the digital elevation model compiled,and published geophysical and geological information. It is concluded that Deception volcano was formed atthe intercept between the large Hero Fracture Zone and the regional fault framing the South Shetland Archipelagofrom its southeast, without the influence of the geodynamic regime of the adjacent Bransfield rift,which is considered by a number of researchers to play a leading role in the evolution of the volcano. Themodern volcano structure is characterized by fault-block tectonics with the domination of NE-trendingfaults.