off the submarine volcano at the eastern King George basin. Recent eruptions took place in 1967–1970 (e.g., Smellie, 2002). They estimated to account for 75% of annual magma output. These are typically formed from extinct volcanoes, that rise abruptly and are usually found rising from a seafloor of 1,000 - 4,000 meters depth. endobj study of the submarine volcanoes of the Bransfield Strait (Antarctica)" is led by the UGR and covers the period 2017-20. The Bransfield Strait is one of only two back-arc basins forming in continental crust that are opening without a large strike-slip component (Lawver et al., 1996). Austin, 1998). José Martín-Dávila. It is funded by the Spanish Ministry of Science and Universities, in collaboration with national and foreign research groups. Alfonso Muñoz Martín. It is a back-arc basin that was opened by extensional forces associated to roll-back subduction after cessation of spreading activity of the Phoenix Ridge, and the transtension of the westward ending of Scotia-Antarctica Plate boundary. This article is in Spanish. Many large base metal deposits, like the Bathurst mining camp in New Brunswick, are thought to have formed the same way. It is among the most active volcanoes in Antarctica, with more than 20 eruptions documented in the last two centuries (Bartolini et al., 2014). The Orca seamount is at present an inactive volcano; however, recently several studies have been conducted in order to detect some hydrothermal activity inside and around the crater ( 2 ). The BRAVOSEIS (BRAnsfield VOlcano SEISmology) project has been proposed to shed light on seismic activity at Central Bransfield Basin in Bransfield Strait. Marek Grad. The deposits form where submarine volcanoes discharge hot (>300°C) metal-bearing fluids onto the seafloor. Submarine vulcano interior the Bransfield Strait, AntarcticaThe lava formed by using submarine volcanoes is extremely different from terrestrial lava. National Oceanic and Atmospheric AdministrationPacific Marine Environmental Laboratory | Acoustics Programoar.pmel.acoustics.webmaster@noaa.gov, New data on seismology of underwater volcanoes of the Bransfield Strait in Antarctica, National Oceanic and Atmospheric Administration. Link: The 'roars' of Antarctica. Once the subduction ceased, it is believed that the extension that created the basin … A group of events located on a submarine volcano suggests current magmatic activity, and swarms of events cluster along well‐established rifts in the northeastern part of the Strait. Deception Island is an island in the South Shetland Islands close to the Antarctic Peninsula with a large and safe natural harbour. The geophysical data interpretation suggests a local character of the present submarine volcanic activity in the SE part of Deception Island. x��\�r۶��S`r�dFa�3�JNRO2��4v;g��DB$b�P Ȋ�"}��&]���mœ��!yl�I��.��v��ũ/�E>z�oџ�����:zv���=��i�������w�{Y�Q��o�9�'(���I�ś.gn�݁�6D��#�c�~�>Q�/�y��(��G������W�E%Q�m���-QT����T"�=�����m���ÔYL���ѦD'J��i��(+��]n�##ѻ�lO9t�w�$��8�Q�����Bv(�q�%��:��=d��&yD�=�S؟gQpistr�Q��M&e*�0%�烩��� Our results clearly indicate tha the eastern portion of Bransfield Strait basin is a site of presently active submarine volcanism at water depths of about 2,000 meters. �t��~�6������8Z. Dis­ solved manganese contents mirror the data, and are shown in figure 3. 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