• 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.

    Sulfidization in a shallow coastal depositional setting: Diagenetic and palaeoclimatic implications

    Thumbnail
    View/Open
    Chem_Geol_322-323_68a.pdf (1.567Mb)
    Date
    2012
    Author
    Mazumdar, A.
    Peketi, A.
    Joao, H.M.
    Dewangan, P.
    Borole, D.V.
    Kocherla, M.
    Metadata
    Show full item record
    Abstract
    The nature of pyrite and C–Fe–S geochemistry in a sediment core (covering the last 378 years) at a water depth of 17 m off Goa, west coast, India has been investigated to understand the diagenetic and palaeoclimatic/oceanographic processes. The chromium reducible sulfur (CRS) and highly reactive iron (FeHR) profiles show significant fluctuations and a negative correlation with delta sup(34)S sub(CRS), which is attributed to relative availability of highly reactive and less reactive iron bearing minerals close to the sediment water interface. Low delta sup(34)S sub(CRS) corresponding to high CRS content characterizes early diagenetic pyritization near the sediment-water interface, whereas high delta sup(34)S sub(CRS) and low CRS content indicate late diagenetic pyritization of less reactive iron during burial. High OBS/CRS ratios suggest the important role played by the labile organic compound in binding sulfur in the sediment. Partitioning of stable sulfur isotopes into organic and iron bound phases is apparently linked to FeHR and labile organic matter availability. We have proposed FeHR profile and FeHR/FeT ratios as a potential tool to understand runoff/monsoonal fluctuations in a shallow marine depositional setting. To develop this tool into a potential paleoclimatic/ oceanographic proxy and to link it to other proxies within a chronological framework, needs high resolution sampling and age dating.
    URI
    http://drs.nio.org/drs/handle/2264/4106
    Collections
    • Scholarly literature [9074]

    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