Paleo-Mesoproterozoic Rifting Along the Margins of Archean Bundelkhand Craton North-Central India: Timing the Event from U–Pb SHRIMP Zircon Data and Their Geodynamic Implications

Abstract In this article, novel geochronological (U–Pb SHRIMP) and geochemical data are presented from the lowermost sandstone unit (Par formation), basement granites of Gwalior Basin sandstones Bhopal Basin, located along margins Archaean Bundelkhand Craton. The variation diagrams imply that units in Basins were deposited rift-induced passive margin tectonic settings. contrast to magmatic features preserved zircons granite Basins, detrital both basins fragmentary polymodal size. zircon grains yield a 207Pb/206Pb concordant age 2538 ± 2 Ma. A group with concentric zonation weighted mean average 2564 24 exhibit patchy U-Th distribution overgrowing 2044 basin three distinct ages 2511 5, 1694 6, 1355±9 presence ~2540 Ma population suggests their derivation similar age. Therefore, an extension Craton below is suggested. 2500 linked global activity leading stabilization extended Ur at ~2500 2048 1355 respectively, concluded as maximum depositional (MDA) stratigraphic within basins. MDAs be timings formations during Nuna or Columbia disintegration, plume-driven tectonics.