HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

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HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS ( handbook-onphysics-and-chemistry-rare-earths )

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152 Handbook on the Physics and Chemistry of Rare Earths 10,000 1000 100 10 3 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu FIG. 14 Chondrite-normalized REE patterns of the igneous rocks in the continental rifting setting. Data sources are kimberlite (Le Roex, A.P., Bell, D.R., Davis, P., 2003. Petrogenesis of group I kimberlites from Kimbery, South Africa: evidence from bulk-rock geochemistry. J. Petrol. 44, 2261–2286), calcic carbonatite (Hornig-Kjarsgaard, I., 1998. Rare earth elements in So€vitic carbonatites and their mineral phases. J. Petrol. 39, 2105–2121), alkali basalt (Späth, A., Le Roex, A.P., Opiyo-Akech, N., 2001. Plume-lithosphere interaction and the origin of continental rift-related alkaline volcanism-the Chyulu Hills volcanic province, southern Kenya. J. Petrol. 42, 765–787), and ijolite and nepheline syenite (Downes, H., Balaganskaya, E., Beard, A., Liferovich, R., Demaiffe, D., 2005. Petrogenetic processes in the ultramafic, alkaline and carbonatitic magmatism in the Kola Alkaline Province: a review. Lithos 85, 48–75). of olivine and several of the following: ilmenite, garnet, diopside, phlogopite, enstatite, and chromite. Many kimberlites contain diamond and coesite, which indicate a deep mantle origin. Kimberlite occurs mainly at continental rift zones and some clusters along transform fault zones similar to carbonatite. Calcic carbonatite Kimberlite, South Africa Alkaline basalt, Kenia Nepheline syenite, Kola Peninsula, Russia Ijolite, South Africa REE concentration/chondrite

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