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Mesoproterozoic tholeiitic and alkalic magmatism is widespread in the southern segment of the Eastern Ghats Belt, India, and is particularly well recorded in three cospatial plutons: Chimakurti, a pluton consisting of clinopyroxenite, anorthosite, and gabbro; Errakonda, a ferrosyenite pluton; and the Uppalapadu nepheline syenite. U–Pb zircon ages of ferrosyenite and nepheline syenite suggest that...
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