Remanent magnetism of dykes and continental drift |
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| Authors: | B S R Rao I V Radhakrishna Murthy |
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| Institution: | (1) Department of Geophysics, Andhra University, Waltair, India |
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| Abstract: | Summary The possibility of utilising the results of remaeent magnetism of sub-surface bodies, as obtained from the magnetic surveys, for the study of continental drift is presented. As an example, the quartz-magnetite bands occurring at Ongole, Andhra Pradesh, India have been magnetically surveyed. A modified method for the interpretation of magnetic anomalies of infinite dykes has been presented and is used for the interpretation of field profiles. A remanent magnetic vector with an up dip of 26° lying exactly in the present magnetic meridian has been obtained, which yields the ancient latitude of India (Reference Town being Nagpur) to be 9°S of equator at an age of 1400 million years. |
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