International Journal For Multidisciplinary Research

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Geochemistry of Mallampalli Group Phyllite from Pakhal Supergroup, Western Belt of Pakhal Basin in Pg Valley, Telangana: Implications for Provenance & Source Area Weathering

Author(s) Debapriya Adhikary, Chinchu S.V
Country India
Abstract Phyllites from the Mallampalli group from the Pakhal Supergroup rocks of Pakhal Basin in PG Valley, Telangana,India was analyzed for their major and trace element geochemistry in order to constrain their provenance and source area weathering. The analyses of the phyllites generally define a single geochemical group by their major- and trace-element abundances. The metamorphosed sediments may be classified as immature by their high index of compositional variability values of mostly < 1. HREE are generally depleted whereas LREE are typically enriched relative to average Proterozoic upper crust. Such geochemical characteristics suggest that the source of the phyllites dominantly consisted of felsic rocks. Average Cr and Ni abundances and Cr/Ni ratios of average phyllites of the Mallampalli metasediments indicate that the source consisted of granitic material. Major element data, plotted in Al2O3 – (CaO+Na2O) – K2O ternary diagram indicate that the phyllites have not undergone significant post-depositional K metasomatism. Low to moderately high chemical weathering of the source terrane is indicated by pre metasomatized chemical index of alteration values of 60 – 86. The geochemical data further suggest that the sediments were deposited within a passive margin setting and mostly supplied by the adjacent basement granitoids.
Keywords Pakhal Supergroup, Mallampalli Phyllite, provenance Study
Field Sociology > Geology
Published In Volume 6, Issue 3, May-June 2024
Published On 2024-05-20
Cite This Geochemistry of Mallampalli Group Phyllite from Pakhal Supergroup, Western Belt of Pakhal Basin in Pg Valley, Telangana: Implications for Provenance & Source Area Weathering - Debapriya Adhikary, Chinchu S.V - IJFMR Volume 6, Issue 3, May-June 2024. DOI 10.36948/ijfmr.2024.v06i03.20853
DOI https://doi.org/10.36948/ijfmr.2024.v06i03.20853
Short DOI https://doi.org/gtwmsk
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