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Nature of Core Material in Marine Manganese Nodules from the Equatorial North Pacific

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Title Nature of Core Material in Marine Manganese Nodules from the Equatorial North Pacific
 
Creator Roonwal, G S
Friedrich, G H
Rajamanikam, G V
 
Description 143-147
Nodules occurring in the area bounded by the Clarion and Clipperton Fracture Zones in the northeast equatorial Pacific show 3 types of core material-(1) pelagic clay, the major substance in which may be embedded the debris of volcanic material and palagonite, (2) angular grains of glassy to porphyritic basalts often having quenched rims, and (3) phosphatic matrix produced due to replacement of calcite, the diagenetic as well as authigenic minerals such as feldspars, zeolites, calcite, barite, apatite and cusps of micronodules. Electron probe and X-ray analyses of basalts, phosphatic matrix, clay and zeolites in nodule cores have been made to establish their genetic relation to the growth of nodules. It is suggested that under marine environment, local topographic variation also plays an important role in the release of elements during accretion and seeding of nodules. The nodules do not appear to have any preference for particular nucleating material. The study indicates that clay, carbonate, phosphate, basaltic and palagonite grains are all equally suitable for seeding and accretion of ferromanganese oxides.
 
Date 2016-12-20T07:18:43Z
2016-12-20T07:18:43Z
1982-06
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/38940
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.11(2) [June 1982]