• Login
    View Item 
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Composition and origin of buried ferromanganese nodules from central Indian Ocean

    Thumbnail
    View/Open
    J_Geol_Soc_India_68_605.pdf (81.45Kb)
    Date
    2006
    Author
    Pattan, J.N.
    Parthiban, G.
    Metadata
    Show full item record
    Abstract
    Five buried ferromanganese nodules were recovered at different depths of 167-169 cm (A), 172 174 cm (B), 228 230 cm (C), 328 330 cm (D) and 418 420 cm (E) in a 5 m sediment core from the siliceous sediment of Central Indian Basin (Lat 9°00' S, Long 76°00'E) at a water depth of 5260 m These nodules were analysed for major, trace and rare earth element (REE) concentrations to understand their genesis and compare with the surface and buried nodules in the top 1 m of the sediment column from the same basin Nodules A, B, C arc of an early diagenetic (Mn/Fe ratio between 9 3 and 15 1), nodule D is of hydrogenetic (Mn/Fe ratio 1 6) and nodule E is of diagenetic (Mn/Fe ratio 3 0) origin Total REE concentration ranges between 164 and 497 ppm (av-348 ppm) and is nearly 2 to 3 fold lower than the surface and buried nodules REE are conveyed from the seawater to the nodules in association with a combined phase consisting of Fe - Ti - P The shale (NASC) - normalized REE pattern displays a small convex pattern with a positive Ce-anomaly indicating an oxidized environment while, the presence of positive Eu-anomal) in nodules A, B and C probably suggest an aeolian dust These buried nodules show a moderate middle and heavy REE enrichment (strong in nodules B and C) compared to light REE, but fractionation between middle and heavy REE is not very clear It appears that not much significant post -depositional changes have occurred in these buried nodules
    URI
    http://drs.nio.org/drs/handle/2264/453
    Collections
    • Scholarly literature [9127]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV