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Underwater geomorphology as a function of the variations in ferromanganese nodule characters in the Indian Ocean

DRS at CSIR-National Institute of Oceanography

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Title Underwater geomorphology as a function of the variations in ferromanganese nodule characters in the Indian Ocean
 
Creator Mukhopadhyay, R.
Banerjee, G.
 
Subject Geology and Geophysics
statistical analysis
cobalt
copper
sediment texture
porosity
ferromanganese nodules
seamounts
bottom topography
ISW, Central Indian Ocean
 
Description Ferromanganese nodules from three areas in the northern part of the Central Indian Ocean Basin have been studied. Statistical analysis shows significant variations in morphological and physical characters of nodules between the area S sub(5), which is situated on the northwestern slope of a seamount, and the other two areas, S sub(4) and S sub(6), which are away from the seamount. Surface roughness, porosity and water content are directly proportional to nodule size. Nodules from area S sub(5) which occur at shallow depth, are mostly large in size, contain rock-fragments as the nucleus, and are rich in Co and Fe and poor in Mn, Ni and Cu. In contrast, nodules from areas S sub(4) and S sub(6) occur at deeper depths, are mostly medium to small in size, contain consolidated mud as the nucleus, and are rich in Mn, Ni and Cu but poor in Fe and Co. Variation in nodule characters indicates a strong influence of seamount topography on the substantial contributions of transitional elements from seawater and sediment interstitial water to the nodules occurring in shallow and deep areas respectively
 
Date 1995-06-24T10:01:49Z
2017-09-30T01:30:01Z
1995-06-24T10:01:49Z
2017-09-30T01:30:01Z
1989
 
Type Journal Article
 
Identifier Current Science, vol.58(3); 1989; 115-119
0011-3891
http://drs.nio.org/drs/handle/2264/7311
 
Language en
 
Relation Curr Sci India
SCI
 
Publisher Current Science Association