Ferromanganese Crusts of the Peter the Great Seamount and the Vasilkovsky Ridge (Sea of Japan)

被引：0
|
作者：
Astakhova, N. V. [1 ]
机构：
[1] Russian Acad Sci, Ilichev Pacific Oceanol Inst, Far East Branch, Vladivostok 690041, Russia
来源：
RUSSIAN JOURNAL OF PACIFIC GEOLOGY | 2023年 / 17卷 / SUPPL 2期
关键词：
ferromanganese crusts; Sea of Japan; Peter the Great Seamount; Vasilkovsky Ridge; RARE-EARTH-ELEMENTS; CHEMICAL-ELEMENTS; MANGANESE CRUSTS; BOTTOM SEDIMENTS; BASIN; GEOCHEMISTRY; RISE;
D O I：
10.1134/S181971402308002X
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The structure and chemical composition of ferromanganese crusts formed on the sedimentary cover of the underwater volcanoes of the Peter the Great Seamount and the Vasilkovsky Ridge, located near the continental slope of Primorye (Sea of Japan), are studied. The crusts were formed as a result of cementation and precipitation of manganese hydroxides on the sediment surface. The signs of the hydrothermal nature of these formations are very high titanium and low aluminum modules, low contents of nonferrous and rare-earth elements (REEs), and an excess of heavy REE contents over the light ones. An ore substance was probably deposited in the Pleistocene-Holocene from postvolcanic hydrothermal solutions. Unlike the crusts deposited on basalts in the central parts of the Sea of Japan, these crusts do not contain inclusions of fine grains of medium- and high-temperature mineral phases of nonferrous metals.
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收藏
页码：S144 / S153
页数：10
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