Titlebook: Origin of Potassium-rich Silica-deficient Igneous Rocks; Alok Krishna Gupta Book 2015 Springer India 2015 Igneous Rocks.K-rich Feldspathoi

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Introduction,Basaltic magmas have been puncturing through the earth’s crust and flooding its surface from time immemorial. They have been derived experimentally by partially melting of mantle peridotites (Green 1973; Takahashi and Kushiro 1983; Hirose and Kushiro 1993).

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Incompatible Mineral Pairs in K-Rich Rocks,The mineral pairsorthopyroxene–leucite, leucite–albite, and melilite–plagioclase are not observed together in natural K-rich silica-deficient igneous rocks formed under volcanic to subvolcanic conditions. The probable cause of incompatible relationship for these pairs are described in this chapter.

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Experimental Studies on K-Rich Rocks,Experimental studies on potassic rocks from Leucite Hills Wyoming, U.S.A. by different investigators are summarized in Table ..

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Structural and Tectonic Evolution of K-Rich Silica-Deficient Volcanic Provinces of Different ContinGenesis of an ultrapotassic magma in the central part of east Africa (Ruwenzori and Birunga volcanic province), the Rhine Graben region of Germany, Damodar Valley Coal Field (east India) and Rio Grande region of the USA is considered to have been associated with the development of rift systems (see Chap. .).

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Classification,nd point the mineralogical classification is more preferred here particularly in view of plethora of rock names given on the basis of localities from which these rocks have been described. Their nomenclature is therefore, not only confusing but also complex at times.

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