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Rare earth element patterns of the Central Indian Basin sediments related to their lithology

DRS at CSIR-National Institute of Oceanography

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Title Rare earth element patterns of the Central Indian Basin sediments related to their lithology
 
Creator Nath, B.N.
Roelandts, I.
Sudhakar, M.
Pluger, W.L.
 
Description Rare earth element (REE) concentration have been determined in terrigenous, siliceous (nodule barren and nodule bearing), calcareous, and red clay from the Central Indian Basin. The bulk distribution of REE, and in particular the relative cerium fractionation, in these surface sediments has been studied in relation to bottom water conditions. REE fractionations within a single depositional environment are found to be characteristic for each sediment type, with flat shale-normalized patterns associated with terrigenous sediments, positive Ce anomalies with siliceous sediments, negative Ce and positive Eu anomalies with calcareous sediments, and LREE-depleted patterns with pelagic red clays. There is no relation of any REE fractionation to bottom water redox conditions. Our results indicate that the REE signatures in marine sediments are not only related to depositional setting, but also to the lithological variations, and surficial diagenetic processes. Therefore, these further constraints on understanding REE behaviour indicate that REE fractionations for paleotectonic and paleoredox reconstructions should be used with caution
 
Date 2009-05-08T12:01:01Z
2009-05-08T12:01:01Z
1992
 
Type Journal Article
 
Identifier Geophysical Research Letters, Vol.19; 1197-1200p.
http://drs.nio.org/drs/handle/2264/3051
 
Language en
 
Rights Copyright [1992]. 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 American Geophysical Union