Volcanic edifices on guyots of the Magellan Seamounts (Pacific Ocean)

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• 作者：M. E. Mel’nikov ; S. P. Pletnev ; V. M. Anokhin…
• 关键词：volcaniclastc rocks ; geological age ; volcanic domes and cones ; guyots ; Magellan Seamounts ; Pacific Ocean
• 刊名：Russian Journal of Pacific Geology
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：10
• 期：6
• 页码：435-442
• 全文大小：
• 刊物主题：Geology;
• 出版者：Pleiades Publishing
• ISSN：1819-7159
• 卷排序：10

文摘

Analysis of detailed bathymetric charts and records of phototelevision profiling over the surfaces of the guyots of the Magellan Seamounts reveals many cones and domes. Their diameters and heights vary from a few hundreds of meters to 10 km and from 30 to 350 m, respectively. The age generations of these mesomorphic structures correspond to the Campanian–Maastrichtian, Late Paleocene–Eocene, and Miocene. The formation of complicating volcanic edifices is most likely determined by late phases of volcanic activity related to differentiation of magmatic melts. At the same time, the tectonic factor responsible for their formation is also sufficiently well evident: volcanic edifices on plateau summits are associated spatially with linear morphostructures and lineaments.