Emplacement of Dyke Swarms, Cretaceous Volcanism and Development of Petroliferous Basins in and around Peninsular India

Comment on "Emplacement history and evolution of the Deccan Volcanic Province, India" by Kale et al. (2020)

“…The paper is also a step forward to remove certain misconceptions such as, the idea of hot spot related volcanism during northerly movement of Indian plate. Furthermore, the authors agree with the (unreferred) series of earlier publications (Misra, 1981, 1999, 2001a, 2004, 2005, 2007, 2008a, 2008c, 2009b, 2013, 2016b, that the volcanism seems to be related with the major rift and grabens. These publications, describe the geological details obtained by extensive field mapping, assisted by aerial photographs and high-resolution satellite images, integrate with the interpretation of aeromagnetic and seismic data sets along with the logs of several hundred drill holes.…”

“…Apart from this, detailed work (Misra, 2008c, 2016b, 2018 has highlighted the significant role played by the volcanism in formation, migration and preferential accumulation of hydrocarbons. During pre-eruption stage the upwelling heat distilled the source sediments, later developing cracks, fractures and inter-connected vesicles provided required porosity and permeability for migration and subsequent flows acted as important trapping mechanism by sealing the joints and fractures.…”

“…Cretaceous volcanism was also accompanied with widespread emplacement of dyke swarms, dykes and igneous complexes with varied chemical composition. Parallel disposition of dyke swarms as well as alignment of complexes along the rift and grabens, illustrates genetic relationship (Misra, 2008a, Misra andMisra, 2016b) and also contradicts the hot spot idea.…”