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    Petrography and Stable Isotope Geochemistry of the Cretaceous El Abra Limestones (Actopan), Mexico: Implication on Diagenesis

    Access Status
    Fulltext not available
    Authors
    Armstrong-Altrin, J.
    Madhavaraju, J.
    Sial, A.
    Kasper-Zubillaga, J.
    Ramasamy, Nagarajan
    Flores-Castro, K.
    Rodríguez, J.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Armstrong-Altrin, J. and Madhavaraju, J. and Sial, A. and Kasper-Zubillaga, J. and Ramasamy, N. and Flores-Castro, K. and Rodríguez, J. 2011. Petrography and Stable Isotope Geochemistry of the Cretaceous El Abra Limestones (Actopan), Mexico: Implication on Diagenesis. Journal of the Geological Society of India. 77 (4): pp. 349-359.
    Source Title
    Journal of the Geological Society of India
    Additional URLs
    http://www.springer.com/earth+sciences+and+geography/geology/journal/12594
    ISSN
    0016-7622
    School
    Curtin Sarawak
    URI
    http://hdl.handle.net/20.500.11937/29918
    Collection
    • Curtin Research Publications
    Abstract

    Petrography and stable isotopes (carbon and oxygen) geochemistry of limestones from the El Abra Formation, Actopan, were studied to identify their digenetic environments. The major petrographic types identified are mudstone, wackestone, grainstone, and boundstone. Most of the studied samples show positive d13C values, except two samples (2 and 28), which are slightly negative values (-0.27‰ and -0.02‰). The organic remains identified in foraminiferal wackestone type can be responsible for the negative d13C values. The d18O values range from -12.41‰ to -4.02‰ and indicate meteoric diagenesis.

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