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Title: Surface Characteristics & Growth Patterns in Some Manganese Nodules from the Central Pacific
Authors: Roonwal, G S
Friedrich, G H
Issue Date: Mar-1981
Publisher: NISCAIR-CSIR, India
Abstract: Scanning electron micrographs of nodules indicate that they are made up of small and large botryoids. When large botryoids are present as aggregates, the nodule texture becomes rough and smaller botryoids give smooth texture. Petrographic study indicates that the growth of nodule starts with the penetration and accumulation of Mn-oxides solutions around a nucleus. The nucleus is generally composed of fossiliferous clayey sediments containing grains ofvo1canic material, ancient nodules, and fish tooth. With subsequent accumulation of Mn-Fe materials around the nucleus, and diagenetic processes several features such as dentrites and cusps develop. Authigenic minerals also grow due to diagenic reconstitution.
Page(s): 57-60
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.10(1) [March 1981]

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