By Evgeny G. Gurvich

ISBN-10: 3540278699

ISBN-13: 9783540278696

ISBN-10: 3540309691

ISBN-13: 9783540309697

Dramatic advances in knowing worldwide tectonics were made within the final part century and the knowledge and particular info bought at the ground of the area Ocean by means of the medical group most likely has exc- ded that on hand in all earlier time. With the good thing about new know-how and complicated recommendations within the earth sciences huge exploration of the deep seabed turned attainable, and has been performed in lots of components of the realm. Many beneficial properties were famous and information recorded which are very important for figuring out the elemental methods that form the earth=s floor and keep an eye on the liveable atmosphere. the information accumulated up to now at the o- an ground and its actual atmosphere enormously exceeds our knowing and appreciation in their basic significance within the earth sciences, and our skill to use this data successfully in bettering our lifestyle. along with his vast clinical wisdom and particular event from - new york cruises in organization with scientists in the course of the global, Dr. Evgeny Gurvich has made a good contribution in buying easy info on hydrothermal and sedimentation techniques within the ocean, in addition to within the synthesis of knowledge and ideas to be had from cruise experiences and an in depth literature.

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Additional resources for Metalliferous Sediments of the World Ocean: Fundamental Theory of Deep-Sea Hydrothermal Sedimentation

Sample text

78 mg cm–2 ka–1. 2) in metalliferous sediments from the Southeast Pacific. If these calculations are correct, the ratio (Feex+Mnex)/Al is a rather exact reflection of the "undistorted" sum (Feex*+Mnex*) in concrete metalliferous sediments, which would be without the redeposition of sedimentary material from the EPR axial zone to the flanks by bottom currents. 84, where Fe, Mn, and Al are contents of Fe, Mn, and Al in these concrete sediments. 2. They have been made at the assumption that there is no excessive Al accumulation in metalliferous sediments (see above).

46 Based on the assumption that the accumulation of Al in metalliferous sediments results only from background process the average relative roles of the excessive accumulation of the elements in % are as follows: Al 0 Pb 63 Zr 79 o o o Si 14 Eu 66 V 82 o o o Rb 25 Cr 68 Co 84 o o o Th 26 Ni 68 Sb 84 o o o Ba 28 Sn 72 Ag 85 o o o Ti 28 Pd 74 As 85 o o o La 36 Zn 76 Mo 89 o o o Ce 48 Cu 77 Au 90 o o o Sm 52 Cd 77 Mn 91 o o Sc 56 Fe 78 o o U 61 Y 78 o o In general this sequence is similar to one for metalliferous sediments from the Southeast Pacific.

One can expect a direct covariance relationship of the ratio of Elex/(Feex+Mnex) and the inverse accumulation rate of the metal-bearing matter. As shown above, the ratio (Feex+Mnex)/Al is a direct indication of the actual accumulation rate of Feex*+Mnex* in specific metalliferous sediments in which the redeposition of sedimentary material by bottom currents is absent. Therefore one can expect a direct proportional relationship to be shown by Elex/(Feex+Mnex) to Al/(Feex+Mnex). The ideal conditions in the examples considered above do not exist because they assume a constant contact time for hydrothermal metal-bearing matter with ocean water.

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Metalliferous Sediments of the World Ocean: Fundamental Theory of Deep-Sea Hydrothermal Sedimentation by Evgeny G. Gurvich

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