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Geochemistry of Dharwar metavolcanics and composition of the primeval crust of the peninsular India |
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| Authors: | SM Naqvi SM Hussain |
| Abstract: | The chemical composition of the Dharwar metavolcanic suite from Chitaldrug is found to be similar to that of early Precambrian metabasalts from Canadian and Australian Shields. Its low K2O content and the similarities in the ferromagnesium trace elements with those of oceanic olivine normative tholeiites indicate a low K2O oceanic type of original magma. It is suggested that a protocontinent having a thin crust approaching basic composition existed during the pre-Dharwar era. |
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