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\bibitem{Brenker_etal2005} {\textquotedblleft}\textit{Detection of a Ca-rich lithology in the Earth{\textquoteright}s deep (> 300 km) convecting mantle}{\textquotedblright}. Brenker FE, Vincze L, Vekemans B, Nasdala L, Stachel T, Vollmer C, Kersten M, Somogyi A, Adams F, Joswig W, Harris JW, Earth and planetary science letters \textbf{236}, 579 (2005).   http://doi.org/10.1016/J.EPSL.2005.05.021

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