Field Relationships and Petrographic Characterization of Amphibolites from the Khammam Schist Belt, Eastern Margin of the Eastern Dharwar Craton, South India

  • Unique Paper ID: 173208
  • PageNo: 2387-2392
  • Abstract:
  • The Archaean schist belts are relics of once extensive areas of meta-volcanic and meta-sedimentary rocks, mostly metamorphosed from greenschist to amphibolite facies. The amphibolite from the Khammam Schist Belt (KSB), located at the eastern edge of the Eastern Dharwar Craton (EDC), preserves its original basic magmatic signatures in terms of lithological association, mineral assemblage and geochemical characteristics, elucidating the Archaean magmatic activity, petrogenesis, and evolutionary processes. Amphibolites manifest as distinct enclaves within the granite gneiss of the Peninsular Gneissic Complex, with pronounced foliation and epidote-amphibolite facies metamorphic mineral assemblages. The amphibolites of KSB, which include elevated levels of ferromagnesian minerals, indicate magma fractionation. The majority of amphibolites possess a calcic tonalite composition, possibly ranging from basaltic to basaltic-andesite, categorized within the tholeiitic magmatic series, showing significant iron enrichment during its earliest phases.

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Copyright © 2026 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{173208,
        author = {k. soni},
        title = {Field Relationships and Petrographic Characterization of Amphibolites from the Khammam Schist Belt, Eastern Margin of the Eastern Dharwar Craton, South India},
        journal = {International Journal of Innovative Research in Technology},
        year = {2025},
        volume = {11},
        number = {9},
        pages = {2387-2392},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=173208},
        abstract = {The Archaean schist belts are relics of once extensive areas of meta-volcanic and meta-sedimentary rocks, mostly metamorphosed from greenschist to amphibolite facies. The amphibolite from the Khammam Schist Belt (KSB), located at the eastern edge of the Eastern Dharwar Craton (EDC), preserves its original basic magmatic signatures in terms of lithological association, mineral assemblage and geochemical characteristics, elucidating the Archaean magmatic activity, petrogenesis, and evolutionary processes. Amphibolites manifest as distinct enclaves within the granite gneiss of the Peninsular Gneissic Complex, with pronounced foliation and epidote-amphibolite facies metamorphic mineral assemblages. The amphibolites of KSB, which include elevated levels of ferromagnesian minerals, indicate magma fractionation. The majority of amphibolites possess a calcic tonalite composition, possibly ranging from basaltic to basaltic-andesite, categorized within the tholeiitic magmatic series, showing significant iron enrichment during its earliest phases.},
        keywords = {Khammam Schist Belt, Eastern Dharwar Craton, Eastern Ghats Belt, Amphibolites},
        month = {February},
        }

Cite This Article

soni, K. (2025). Field Relationships and Petrographic Characterization of Amphibolites from the Khammam Schist Belt, Eastern Margin of the Eastern Dharwar Craton, South India. International Journal of Innovative Research in Technology (IJIRT), 11(9), 2387–2392.

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