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Ferromanganese nodules and their associated sediments from the Central Indian Ocean Basin: Rare earth element geochemistry

DRS at CSIR-National Institute of Oceanography

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Title Ferromanganese nodules and their associated sediments from the Central Indian Ocean Basin: Rare earth element geochemistry
 
Creator Pattan, J.N.
Rao, Ch.M.
Migdisov, A.A.
Colley, S.
Higgs, N.C.
Demidenko, L.
 
Subject ferromanganese nodules
sediments
rare earths
deep water
geochemistry
correlation analysis
 
Description The rare earth element (REE) distribution in nine deep-sea ferromanganese nodules and their associated siliceous sediments from the Central Indian Ocean Basin (CIOB) have been studied to elucidate the REE relationship among them. Total REE concentration varies from 398-928 ppm in the nodules and 137-235 ppm in the associated sediments, suggesting two- to four-fold enrichment in the nodules compared to associated sediments. REE of nodules and their associated sediments show a positive correlation, suggesting REE are supplied from a common source such as seawater. The positive correlation between REE of nodules and sediments from the CIOB is contrary to the competitive scavenging of REE between nodules and sediment in the equatorial Pacific Ocean. REEs in the nodules are carried by Fe, P, and Ti, whereas in the sediment they are carried by P and Mn phases. A similar REE fractionation pattern with middle REE enrichment over heavy and light REE in both the nodules and their associated sediment suggest fractionation is independent of REE abundance and their carrier phases
 
Date 2009-01-07T10:43:44Z
2009-01-07T10:43:44Z
2001
 
Type Journal Article
 
Identifier Marine Georesources and Geotechnology, Vol.19; 155-165p.
http://drs.nio.org/drs/handle/2264/1568
 
Language en
 
Rights Copyright [2001]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Taylor and Francis