Petrology and geochemistry of a boninite dyke from the western Bastar craton of central India

The Dongargarh Supergroup along with the basal Amgaon Gneissic Complex constitutes the northwestern part of the central Indian Bastar craton. In the present study, we report a new finding of a boninite dyke intruded in the Amgaon gneisses of this area. The dyke composed of mainly pyroxenes, amphiboles and subordinate amount of plagioclase. The higher contents of \(\hbox {SiO}_{2}\) (51–54 wt.%), MgO (12–14 wt.%), Ni (375–473 ppm), Cr (1416–1580...