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Contrasting Volcanic Suites in Naga Hills and Their Bearing on the Tectonic Evolution of the Naga Hills Ophiolite Belt, N.E. India
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The 200 km long Naga Hills opiliolite belt which forms the northern part of the Indo-Burman ophiolites is made up of two contrasting volcanic suites. viz.; (1) high-Mg basalts (Mg-number 52 to 71) comparable to mid-oceanic ridge basalts and (2) low-Mg (Mg-number 23 to 49) akin to seamount type volcanism.
Based on geological and geochemica 1 evidences, a three stage model comprising (1) marginal basin spreading event, (2) seamount event and (3) collision event, is presented to explain the origin and evolution of the Naga Hills ophiolites.
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