...Ai Cheng Zhang; Ru Cheng Wang; Huan Hu; Xiao Ming Chen; Hui Zhang Abstract Two species of X -site-vacant tourmalines, foitite and rossmanite, occur in the Koktokay No. 3 granitic pegmatite dyke, Altai, northwestern China, a spodumene-subtype pegmatite. Foitite–schorl crystals develop as fillings...

... pegmatite dykes, where the Koktokay No. 3 granitic pegmatite is one of the most strongly zoned. The Koktokay No. 3 granitic pegmatite, with a NW–SE strike, intrudes into metagabbro (Fig. 1 ), which is located in gneissic biotite granites. Although a few previous investigations documented...

...-equilibration. The Koktokay no. 3 pegmatite is one of thousands of pegmatite dykes in the Altai pegmatite district, NW China (Fig. 1a ). According to Černý’s classification ( Černý 1991 ), the Koktokay no. 3 pegmatite is a rare-element class, LCT family pegmatite that belongs to the spodumene-subtype...

.... , Wang , R.C. , Hu , H. , Chen , X.M. & Zhang , H. ( 2004a ): Occurrences of foitite and rossmanite from the Koktokay No. 3 granitic pegmatite dyke, Altai, northwestern China: a record of hydrothermal fluids . Can. Mineral . 42 , 873 – 882 . Zhang , A.C. , Wang , R.C...

...., & Zhou, D.S. (2000) Magmatic-hydrothermal evolution and genesis of Koktokay No. 3 rare metal pegmatite dyke, Altai , China. Geological Journal of China University 6 (1) , 40 – 52 (in Chinese with English abstract) . Zhu, Y.F., Zeng, Y.S., & Gu, L.B...

... Keketuohai West dyke-Be 213±2 I-1 Wang et al . 2007 c Koktokay No. 3 Li-Be-Nb-Ta-Rb-Cs-Hf 194.8±2.3 I-1 Wang et al . 2007 c ; Zhou et al . 2015 a 177.9–182.1 V Chen et al . 2000 ; Zhou et al . 2015 a 196.4±1.5 III Zou et al . 1986 Qiongkuer–Abagong (IV...

... 12 05 2008 02 12 2009 © 2009 E. Schweizerbart’sche Verlagsbuchhandlung, D-70176 Stuttgart 2009 beryl caesium chemical analysis Koktokay #3 pegmatite Altai China The Koktokay #3 pegmatite (or “Altai No.3 pegmatite”) is one of thousands of pegmatite dykes in the Altai...

... a): Occurrences of foitite and rossmanite from the Koktokay No.3 granitic pegmatite dyke, Altai, Northwestern China: A record of hydrothermal fluids . Can. Mineral ., 42 , 873 – 882 . Zhang , A.C. , Wang , R.C. , Hu , H. , Zhang , H. , Zhu , J.C. , Chen , X.M. ( 2004 b...

...Jinsheng Han; Zhenhua Zhao; Pete Hollings; Huayong Chen Abstract The petrogenesis of the world famous Koktokay No. 3 pegmatite in the Chinese Altai Mountains is still enigmatic due to its superenrichment of rare metals and the apparent absence of a parental granite. We present results from...

...Rong Yin; Ru Cheng Wang; Ai-Cheng Zhang; Huan Hu; Jin Chu Zhu; Can Rao; Hui Zhang Abstract The Koktokay No. 1 pegmatite in northwestern China is a highly fractionated Li-Cs-Ta (LCT) - type granitic pegmatite. As main Nb - Ta oxides in this pegmatite, columbite-group minerals (CGMs) not only display...

... and rossmanite from the Koktokay No.3 granitic pegmatite dyke, Altai, northwestern China: a record of hydrothermal fluids . Can. Mineral ., 42 , 873 – 882 . Zhang , A.C. , Wang , R.C. , Jiang , S.Y. , Hu , H. , Zhang , H. ( 2008a ): Chemical and textural features of tourmaline from...

... No. 3 rare metal pegmatite dyke, Altai, China . Geol. J. China Universities 6 , 40 - 52 (in Chinese). Roughly 100,000 pegmatite dykes occur in the Chinese Altai pegmatite field; the Koktokay No. 3 pegmatite is one of the most strongly zoned. This pegmatite, which shows a NW–SE elongation...

...–Evans greenstone belt of the Opatica Subprovince in Quebec. The main pegmatite body of the Eastern block comprises a near-vertical dyke that is simply zoned, with an aplitic border surrounding an extensive zone of quartz–spodumene pegmatite. Within this extensive unit, irregular quartz- and lepidolite...

... and rossmanite from the Koktokay No. 3 granitic pegmatite dyke, Altai, NW China: a record of hydrothermal fluids . Can. Mineral . 42 , 873 – 882 . Zhang , A.C. , Wang , R.C. , Hu , H. , Zhang , H. , Zhu , J.C. & Chen , X.M. ( 2004b ): Chemical evolution of Nb-Ta oxides...

... ( Kudryashov et al., 2020 ). Another object for comparison is zircons from the rare metal Li-Cs-Ta pegmatites of Koktokay (Altai, China) ( Zhang et al., 2004 ; Yin et al., 2013 ). In addition to the similar ore orientation with the objects studied, zircons from these highly differentiated pegmatites similarly...

... pegmatites of the Třebíč Pluton where it is associated with bazzite, bavenite–bohseite, and smectite ( Novák & Filip 2010 ) and from the spodumene LCT pegmatite Koktokay No. 3 ( Wang et al . 2009 ). Secondary beryl replacing K-feldspar in granite spatially related to greisen was described from...

... from the outer contact inward in the Nanping No. 31 pegmatite dyke, in southern China. Three types of magmatic paragenetic assemblages of Be minerals are distinguished. The first type consists primarily of Be silicates (beryl + phenakite) in the outer zones (zones I–II), which likely results from Al...