Journal of the Geological Society of India

, Volume 77, Issue 4, pp 349–359

Petrography and stable isotope geochemistry of the cretaceous El Abra Limestones (Actopan), Mexico: Implication on diagenesis

  • John S. Armstrong-Altrin
  • J. Madhavaraju
  • Alcides N. Sial
  • Juan J. Kasper-Zubillaga
  • R. Nagarajan
  • K. Flores-Castro
  • Janet Luna Rodríguez
Article
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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 δ13C 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 δ13C values. The δ18O values range from −12.41‰ to −4.02‰ and indicate meteoric diagenesis.

Keywords

Carbonate Rocks Carbon and Oxygen Isotopes Diagenesis Hidalgo State Mexico 

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Copyright information

© Geological Society of India 2011

Authors and Affiliations

  • John S. Armstrong-Altrin
    • 1
  • J. Madhavaraju
    • 2
  • Alcides N. Sial
    • 3
  • Juan J. Kasper-Zubillaga
    • 1
  • R. Nagarajan
    • 4
  • K. Flores-Castro
    • 5
  • Janet Luna Rodríguez
    • 5
  1. 1.Instituto de Ciencias del Mar y Limnología, Unidad de Geología Marina y AmbientalUniversidad Nacional Autónoma de MéxicoMexico D.F.Mexico
  2. 2.Estación Regional del Noroeste, Instituto de GeologíaUniversidad Nacional Autónoma de MéxicoHermosilloSonora, Mexico
  3. 3.Nucleo de Estudos Geoquímicos e Laboratório de Isótopos Estáveis (NEG — LABISE), Departmento de GeologiaUniversidade Federal de PernambucoRecife, PEBrazil
  4. 4.Department of Applied Geology, School of Engineering and ScienceCurtin University of TechnologyMiri, SarawakMalaysia
  5. 5.Universidad Autónoma del Estado de Hidalgo, Centro de Investigaciones en Ciencias de la TierraCiudad UniversitariaPachuca, HidalgoMexico

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