Geochemical evolution and late re-equilibration of Na-Cs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China)

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 天体化学和行星科学实验室

	Geochemical evolution and late re-equilibration of Na-Cs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China)
	Wang, Ru Cheng 1; Che, Xu Dong 1; Zhang, Wen Lan 1; Zhang, Ai Cheng 2; Zhang, Hui 3
刊名	EUROPEAN JOURNAL OF MINERALOGY
	2009-07-01
卷号	21 期号:4 页码:795-809
关键词	beryl caesium chemical analysis Koktokay #3 pegmatite Altai China
ISSN号	0935-1221
英文摘要	Geochemical variations of Na- and Cs-rich beryl were studied in the Koktokay #3 pegmatite, Altai district, China. Complex internal textures in individual crystals characterize two groups of beryl (primary and secondary). Complete analyses of the primary beryl reveal a broad range of alkali contents (mostly Na and Cs) and femic contents (mostly Fe) between outer (I-IV) and inner (V-VII) zones of the pegmatite. Primary beryl in outer zones contains 0.16-0.92 wt% FeO, 0.39-1.87 wt% Na(2)O and similar to 0-0.43 wt% Cs(2)O, respectively, whereas that in inner zones contains negligible FeO but higher alkalis with 1.19-1.99 wt% Na(2)O and 2.99-3.95 wt% Cs(2)O. Three types of secondary beryl can be distinguished. (1) The first is the Cs-enriched veinlets with up to 8 wt% Cs(2)O and 2.2 wt% Na(2)O in primary beryl from the zones I-IV, which resulted from precipitation of Cs-rich fluids along fractures in primary beryl crystals. (2) The second type is a mosaic-like texture consisting of a Cs-Na-poor domain and Na-Cs-rich veinlets within primary, blocky beryl crystals. Textural relationship indicates a two-step hydrothermal alteration. (3) The third is Na-enriched beryl that occurs as a marginal zone of primary beryl or as network of veinlets in primary beryl, and is simply related to hydrothermal replacement of primary beryl by Na-rich fluids.
学科主题	Mineralogy
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Mineralogy
研究领域[WOS]	Mineralogy
关键词[WOS]	NO. 3 PEGMATITE ; GRANITIC PEGMATITE ; NORTHWESTERN CHINA ; FEATURES ; ORIGIN ; ZIRCON
收录类别	SCI
语种	英语
WOS记录号	WOS:000270166000011
公开日期	2011-12-08
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1563]
专题	紫金山天文台_天体化学和行星科学实验室
作者单位	1.Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing 210093, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ru Cheng,Che, Xu Dong,Zhang, Wen Lan,et al. Geochemical evolution and late re-equilibration of Na-Cs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China)[J]. EUROPEAN JOURNAL OF MINERALOGY,2009,21(4):795-809.
APA	Wang, Ru Cheng,Che, Xu Dong,Zhang, Wen Lan,Zhang, Ai Cheng,&Zhang, Hui.(2009).Geochemical evolution and late re-equilibration of Na-Cs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China).EUROPEAN JOURNAL OF MINERALOGY,21(4),795-809.
MLA	Wang, Ru Cheng,et al."Geochemical evolution and late re-equilibration of Na-Cs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China)".EUROPEAN JOURNAL OF MINERALOGY 21.4(2009):795-809.