Palaeo-tectonic environment of the Precambrian basaltic mafic dykes on the application of chemical discriminants |
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| Authors: | T Ramamohana Rao B V Satyanarayana Raju M V Rama Raju |
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| Institution: | 1. Department of Geology, Andhra University, 530 003, Waltair, India
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| Abstract: | Dykes of Chitaldurg and Newer Dolerite I are OFB and represent early attempts to rift and to generate oceanic crust. Shimoga dykes are CAB and belong to orogenic phase. Guntur dykes and Ananthapur-Chittoor dykes are OIB and these are related to ‘hot spot’. Newer Dolerite II is CONB and belongs to healing and filling of fractured crust. The Cuddapah dykes are transitional to all magma types and these represent a compound event of rifting and filling of fractured continental crust. |
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