Petrology, geochemistry and U–Pb zircon geochronology of alkali granites of Jhalda, eastern India and their possible linkage to Rodinia Supercontinent

Petrology, geochemistry and U–Pb zircon geochronology of Fe–Ti oxide ore‐bearing mafic sill from Saltora‐Mejia area of Chotanagpur Granite Gneissic Complex, eastern India: Implication for late tectonic emplacement of mafic rock of E‐MORB nature in an orogenic belt

“…Both orogenic calc‐alkaline granites (both I‐ and S‐type) and anorogenic alkaline granites are found having similar and overlapping ages such as 1.0 Ga old orogenic S‐type pink alkali granite near Raghunathpur‐Bero‐Ramchandrapur area of the CGGC, ~966.7 ± 7.0 Ma old ferroan A‐type alkali granite near Jhaldah, Purulia, CGGC, ~950 Ma old alkaline magmatism near Santuri‐Kankarkiari area of the CGGC etc. (Chakraborty et al, 2019; Chakraborty et al, 2022; Das et al, 2018). Anorogenic felsic magmatism having an age of ~960 Ma is also reported from Antarctica, a continental block involved in Rodinia supercontinent cycle (Sor Rondane Mountain, Elburg et al, 2015).…”

“…The CGGC which has evidences of orogenic activity (Phases of highgrade metamorphism and intense deformation) during late Paleoarchean to Neoarchean has an evolutionary history very similar to that of the Eastern Ghat Mobile Belt (EGMB) during the same period. Possibly, the evolutionary history of CGGC and EGMB during the Proterozoic (1.8-0.8 Ga) is related to two major supercontinental cycles, namely Columbia and Rodinia, when India was juxtaposed against Antarctica and CGGC and EGMB were adjacent to the Rayner Complex and eastern part of Vestfold hills of Antarctica (Chakraborty et al, 2022;Patel et., 2021;Sanyal & Sengupta, 2012). The Singhbhum Craton (SC) which is adjacent to CGGC has records of Archean geological events and is considered a typical Archean Granite-Greenstone terrain (Chaudhuri, 2020;Hofmann et al, 2022;Mukhopadhyay & Matin, 2020;Patel et al, 2021;Saha et al, 2021).…”