Iron-manganese nodules from nares abyssal plain: geochemistry and mineralogy.
Science
; 161(3843): 780-1, 1968 Aug 23.
Article
em En
| MEDLINE
| ID: mdl-17802621
ABSTRACT
Three nodules from a core taken north of Puerto Rico are composed chiefly of an x-ray amorphous, hydrated, iron-manganese oxide, with secondary goethite, and minor detrital silicates incorporated during growth of the nodules. No primary manganese mineral is apparent. The nodules are enriched in iron and depleted in manganese relative to Atlantic Ocean averages. The formation of these nodules appears to have been contemporary with sedimentation and related to volcanic activity.
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Science
Ano de publicação:
1968
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Article