Описание: Deep-sea manganese nodules, once an obscure scientific curios- ity, have, in the brief span of two decades, become a potential mineral resource of major importance.
Автор: The United Nations Ocean Economics and Technology Название: Manganese Nodules: Dimensions and Perspectives ISBN: 9027709025 ISBN-13(EAN): 9789027709028 Издательство: Springer Рейтинг: Цена: 14365.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Автор: The United Nations Ocean Economics and Technology Название: Manganese Nodules: Dimensions and Perspectives ISBN: 9027705003 ISBN-13(EAN): 9789027705006 Издательство: Springer Рейтинг: Цена: 19589.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: After the Secpnd World War, a comprehensive investigation of the World Ocean started, and new data were obtained on a wide distribution of manganese nodules and their polymetallic composition, that made scientists consider nodules as one of the major characteristics of the deep oceanic zone.
Описание: The degree of sum- mer insolation on the Earth`s northern Hemisphere is believed to be relevant to climate because the North Atlantic is where cold saline water is being formed. In contrast, upwelling deep water transfers nutrients from the deep ocean to the surface water.
Автор: I.M. Varentsov Название: Manganese Ores of Supergene Zone: Geochemistry of Formation ISBN: 9048146623 ISBN-13(EAN): 9789048146628 Издательство: Springer Рейтинг: Цена: 30606.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The significance of manganese ores is very weil known in cast iron and steel production, as weil as in various types of chemical raw material and agricultural fertilizers. The world industry development in recent years requires their increased production in the vicinity of the metallurgical centers in different regions of the world; high grade manganese and associated metalores are needed. Analysis of the world production and consumption of manganese ores by industrial countries indicates convincingly that the highest commercial value belongs to the ores associated with the supergene zone (National Minerals Advi- sory Board, 1981; Coffman and Palencia, 1984; Doncoisne, 1985; Iones, 1990, 1991; Manganese, 1990; McMichael, 1989). The remarkable property of manganese, in contrast to many other types of mineral resources, is that the ore accumulations of this metal are distributed in the wide geochrono- logical interval from the Archean to the present time; these ores are deposited in basins and supergene environments of different types from lakes, internal seas to pelagic and abyssal regions of the World ocean, as weIl as different types of weathering crusts and karst. At the same time the manganese accumulations and features of their mineral and chemical compositions are relatively sensitive indicators, reflecting facies and geodynamic condi- tions of their formation. These properties aid the investigation of the Earth's evolution processes.
Автор: I.M. Varentsov Название: Manganese Ores of Supergene Zone: Geochemistry of Formation ISBN: 0792339061 ISBN-13(EAN): 9780792339069 Издательство: Springer Рейтинг: Цена: 30606.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The major part of the world`s high grade industrial manganese ore is being mined in supergene deposits. This text represents an attempt to bring together not only academic but also commercial data on all aspects of the geochemistry of formation of supergene manganese ores.
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