Odyssey of Archaean crustal evolution of the Southern Indian shield: An insight from petrogenesis of distinct Mesoarchaean and Neoarchaean trondhjemite to granite suites from the northwestern margin of the Dharwar Craton, India

Odyssey of Archaean crustal evolution of the Southern Indian shield: An insight from petrogenesis of distinct Mesoarchaean and Neoarchaean trondhjemite to granite suites from the northwestern margin of the Dharwar Craton, India

Tectonic setting and crustal evolutionary processes recorded in the Meso–and Neoarchaean crust in the northwestern margin of the Dharwar Craton are discussed in this paper based on the geochemistry of 2.97 Ga granite from Kumta-Manjuguni-Kakkalli (KMK) and ≤ 2.65 Ga trondhjemite to granite near Ramn...

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Veröffentlicht in:Lithos 2023-10, Vol.454-455, p.107280, Article 107280
Hauptverfasser: Hegde, Venkatraman S., Manikyamba, C., Basavaraj, K. Koti, Hulaji, Shivani, Korakoppa, Mahesh M, Shalini, G.
Format: Artikel
Sprache:eng
Schlagworte:
Crustalstabilization
Geodynamic setting
Granite
Neoarchaean
Trondhjemite
Western Dharwar Craton
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Zusammenfassung:Tectonic setting and crustal evolutionary processes recorded in the Meso–and Neoarchaean crust in the northwestern margin of the Dharwar Craton are discussed in this paper based on the geochemistry of 2.97 Ga granite from Kumta-Manjuguni-Kakkalli (KMK) and ≤ 2.65 Ga trondhjemite to granite near Ramnagar-Khanapur (RK). Both the plutonic suites are potassic (total alkalies∼8.9%), high in silica (SiO2 ∼ 71.9 wt%), and metaluminous to weakly peraluminous. The granite from KMK is characterized by moderately fractionated rare earth elements (REE) pattern (Lan/Ybn 
ISSN:0024-4937
1872-6143
DOI:10.1016/j.lithos.2023.107280