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    Sediment geochemistry of coastal environments, southern Kerala, India: implication for provenance

    Access Status
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    Authors
    Varghese, T.
    Nageshrao, P.
    Raghavendramurthy, N.
    Ramasamy, Nagarajan
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Varghese, T. and Nageshrao, P. and Raghavendramurthy, N. and Ramasamy, N. 2018. Sediment geochemistry of coastal environments, southern Kerala, India: implication for provenance. Arabian Journal of Geosciences. 11: Article ID 61.
    Source Title
    Arabian Journal of Geosciences
    DOI
    10.1007/s12517-018-3406-9
    ISSN
    1866-7511
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/67183
    Collection
    • Curtin Research Publications
    Abstract

    Late Quaternary sediments representing the floodplain, estuary and offshore environments of southern Kerala were investigated to infer provenance. The grain size reveals the dominance of sand to silty clay, clay to clayey silt and clayey silt in the floodplain, estuary and offshore sediments, respectively. The chemical index of alteration (CIA) values and A-CN-K plot attributes to high, moderate and low weathering in floodplain, estuary and offshore regions, respectively. The SiO 2 /Al 2 O 3 values lesser than Post-Archean Australian Shale indicate low to moderate maturity for the estuarine and offshore sediments. The geochemical immaturity indicates its derivation from low to moderately weathered source rocks. The major and trace elemental ratios and discriminant function diagrams attribute that the sediments were derived from intermediate to felsic source rocks. The enrichment of Cr and Ni concentration in the sediments compared to the upper continental crust, related to the contribution of orthopyroxenes, weathered from charnockite and garnets from the granulite terrain, respectively.

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