| Zhang, A. C., Wang, R. C., Hu, H., Zhang, H., Zhu, J. C., Chen, X. M. (2004) Chemical evolution of Nb-Ta oxides and zircon from the Koktokay No. 3 granitic pegmatite, Altai, northwestern China. Mineralogical Magazine, 68 (5) 739-756 doi:10.1180/0026461046850216 | Journal (article/letter/editorial) | Nb-Ta oxides and zircon from the Koktokay No. 3 granitic pegmatite, Altai, northwestern China A. C. ZHANG1...550002, China ABSTR ACT The Koktokay No. 3 granitic pegmatite, Altai, northwestern China, is a strongly...strongly zoned rare-element granitic pegmatite, where the petrographic zones were distinguished into two...Nb-Ta oxides and zircon in the Koktokay No. 3 granitic pegmatite may suggest that the outer zones crystallize...an elevated evolution of the Koktokay No. 3 granitic pegmatite. K EY WORDS : columbite-tantalite, tapiolite |
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