Geochemical characterization and tectonic significance of the A-type granite in the Tikiba Granitic Complex (TGC), Northwest Odisha, India
Sethy, Pratap (Wadia Institute of Himalayan Geology (Índia))
Naik, Ashutosh (Sambalpur University (Índia))
Nayak, Ranjit (Sri Sri University (Índia))

Date:	2025
Abstract:	The Precambrian tectonic evolution and growth of continental crust in the southern part of North Odisha Singhbhum Craton discusses the possible petrogenetic process and source characteristics. These granites are in the contact area between the Eastern Ghat granulite belt and the North Odisha Singhbhum Craton and Archean Deogarh group of rocks. In this contribution, we report the petrography, and geochemistry of the Tikiba Granitic Complex (TGC) of North Odisha Singhbhum Craton. The present study involves the five types of granitic units of TGC and the geochemical variations. Petrographically, the TGC is comprised of alkali feldspar granite, monzogranite to granodiorite. The major element chemistry of the complex reveals calc-alkaline and ferroan to magnesium affinities and metaluminous to the peraluminous character. It is enriched in LILE and HFSE like Yb, Sm, Zr, and Y. The (La/Yb)N values range from 4. 0-26. 1 and exhibit distinct negative Eu anomalies (Eu/Eu*) (0. 4-0. 6). This granitic complex shows high ∑REE contents of 176-860 ppm with variable enrichment in LREE. Both REE and other incompatible element compositions define its A-type affinities. Based on geochemical data, we conclude that these granitoids have probably derived from a predominant crustal source with variable mantle characteristics in a post-orogenic setting.
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Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Tikiba granitic complex ; A-type granites ; Post orogenic ; Archean ; Singhbhum craton
Published in:	Geologica acta, Vol. 23 (2025) (Articles) , ISSN 1696-5728

Adreça original: https://revistes.ub.edu/index.php/GEOACTA/article/view/49018
DOI: 10.1344/GeologicaActa2025.23.20

17 p, 3.7 MB

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