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Petrography and geochemistry of the Upper Cretaceous Gryphaea Limestones, Kallankurichi Formation, Ariyalur Group, Trichinopoly, Southern India: Implication for palaeoenvironment

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Authors: Department of Geology, V.O. Chidambaram College, Thoothukudi, Tamil Nadu, India, M Senthiappan, V. Stephen Pitchaimani, Department of Geology, V.O. Chidambaram College, Thoothukudi, Tamil Nadu, India, A V Udayanapillai, Department of Geology & Quantum Material Research Laboratory, Department of Nano-Science & Technology, Alagappa University, Karaikudi, Tamil Nadu, India, Perumal Velmayil, Department of Geology & Quantum Material Research Laboratory, Department of Nano-Science & Technology, Alagappa University, Karaikudi, Tamil Nadu, India, Bangarupriyanga Sundaram, Department of Geology & Quantum Material Research Laboratory, Department of Nano-Science & Technology, Alagappa University, Karaikudi, Tamil Nadu, India, G Ramalingam, Department of Geology & Quantum Material Research Laboratory, Department of Nano-Science & Technology, Alagappa University, Karaikudi, Tamil Nadu, India, John S Armstrong Altrin, Unidad de Procesos Oceánicos y Costeros, Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Ciudad Universitaria, Mexico City, Mexico

Year

2023

Paper ID

11787

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

132

Citations

2

Abstract

Sub-surface Kallankurichi gryphaea limestone formation is observed between Archaean and Quaternary outcrops. Petrographic observation reveals that mega fossils are absent and it contains abundant skeletal fragments of pelecypods, gastropods, foraminifera, bryozoa, and symbiotic algae. X-ray diffraction (XRD) analyses reveal the mineralogical components of both carbonate and clay minerals. Carbonate minerals include calcite, siderite, witherite, malachite, smithsonite, and rhodochrosite. Clay minerals detected are kaolin, montmorillonite, and palygorskite. Major element composition represents predominance of CaO, SiO2, Al2O3, and Fe2O3 oxides, while MgO, MnO, Na2O, K2O, TiO2, and P2O5 oxides are depleted. Statistical analyses of correlation coefficient, principal component analysis, and cluster analysis represent the geochemical affinities and aerial distribution similarities among major elements. Palaeoclimate inferred through biotic proxies, major element geochemistry, and clay minerals represents arid and semi-arid climate.

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  • Sub-surface Kallankurichi gryphaea limestone formation is observed between Archaean and Quaternary outcrops.

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References & Citation Signals

[1] DOI https://doi.org/10.51710/jias.v40iii.309 [2] Publisher https://doi.org/10.51710/jias.v40iii.309

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