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Geochemical evidence of terrigenous influence in deep-sea sediments upto 8�S in the Central Indian basin

DRS at CSIR-National Institute of Oceanography

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Title Geochemical evidence of terrigenous influence in deep-sea sediments upto 8�S in the Central Indian basin
 
Creator Nath, B.N.
Rao, V.P.
Becker, K.P.
 
Subject Geology and Geophysics
sediment composition
geochemistry
ocean floor
sediments
ISW, Indian Ocean
 
Description Thirty-two representative deep-sea sediment samples have been studied from three manganese nodule-bearing environments in the Central Indian Basin: diatomaceous-radiolarian ooze-clay, pelagic brown clay and calcareous ooze. They have been analysed for major and minor elements such as Si, Al, Ca, Mg, Na, K, Fe, Mn, P, Ti, Ba, Cu, Ni, Co, V, Zn and Cr. R-mode factor analysis reveals five important sources for these elements: (1) detrital (loaded with Fe, Ti, Al, Mg, Mn, P and K), (2) combined hydrogenetic-diagenetic (Mn, Ni, Cu, Co and Fe), (3) biogenic (Si) (4) seasalts (Na and Mg) and (5) dissolution residue (Ba). Factor scores, distributional trends of detrital elements, Al, Ti and Fe concentrations and Al/Al + Fe + Mn ratios provide new geochemical evidence for the effect of the terrigenous influx from the Ganges-Brahmaputra rivers into the northern part of the basin up to 8 degrees S which inhibits the growth of manganese nodules in this area. In contrast, incorporation of transitional metals into sediments and manganese nodules in the other two areas of the basin is governed by hydrogenetic and diagenetic processes
 
Date 1995-06-24T10:01:49Z
2017-09-30T01:29:55Z
1995-06-24T10:01:49Z
2017-09-30T01:29:55Z
1989
 
Type Journal Article
 
Identifier Marine Geology, vol.87; 1989; 301-313
0025-3227
http://drs.nio.org/drs/handle/2264/7200
 
Language en
 
Relation Mar Geol
SCI
 
Publisher Elsevier