The basic instrusions at Chirha and Tikwa,Shahdol district,M.P. |
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| Authors: | S Lakshmanan |
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| Institution: | 1. Centre of Advanced Study in Geology, University of Saugar, India
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| Abstract: | While mapping parts of the Shahdol district, the author for the first time noticed a dolerite dyke at Tikwa and a basalt sill at Chirha intrusive into the Gondwanas (Supra-Barakars). Though the dolerite dyke shows no noteworthy features in the field, the sill encloses xenoliths of Supra-Barakar sandstone in its basal portion. The present paper gives an account of the mode of occurrence, petrography and age relationship of these intrusions. The presence of abundant xenocrysts of quartz in the basalt sill leads the author to term it a quartz-xenocryst-basalt. The occurrence of Deccan Trap flows in the close proximity of the intrusions suggest that they may be related to the period of Deccan Trap activity. |
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