Topics in Igneous PetrologyJyotisankar Ray, Gautam Sen, Biswajit Ghosh The second half of the past century witnessed a remarkable paradigm shift in approach to the understanding of igneous rocks. Global literature records a change from a classical petrographic approach to emphasis on mineral chemistry, trace element characteristics, tectonic setting, phase relations, and theoretical simulation of magma generation and evolution processes. This book contains contributions by international experts in different fields of igneous petrology and presents an overview of recent developments. This book is dedicated to the late Dr Mihir K. Bose, former professor of the Department of Geology, Presidency College, Calcutta, India, who actively participated in the development of this new global view of igneous petrology. |
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active alkaline andesite anorthosites associated average Barren Island belt charnockites chemical clinopyroxene complex composition containing contents continental core correlation crust crystallization Deccan Traps depleted diagram Earth Planet Eastern enriched eruption et al evidence evolution field flood basalts flows Formation formed fractionation garnet geochemical geochemistry Geol Geological grains granites Group higher Hills implications India indicate isotopic lavas lithosphere located lower mafic magma major mantle melting metamorphism minerals Narcondam Nature observed occur oceanic olivine ophiolite origin patterns peridotite Petrol phase phenocrysts pigeonite plagioclase plate plot plume present processes province pyroxene range ratios region relatively result rocks samples scapolite sequence similar SiO2 South southern structure subduction suggest suite Table tectonic temperature texture tholeiitic trace element trend types University upper values variation volcanic volcaniclastic western zircon zone