Mobilization and enrichment of high-field strength elements during late- and post-magmatic processes in the Shuiquangou syenitic complex, Northern China

doi:10.1016/S0009-2541(03)00162-1

	Mobilization and enrichment of high-field strength elements during late- and post-magmatic processes in the Shuiquangou syenitic complex, Northern China
	Jiang, N ; Sun, SH ; Chu, XL ; Mizuta, T ; Ishiyama, D
刊名	CHEMICAL GEOLOGY
	2003-10-16
卷号	200 期号:1-2 页码:117-128
关键词	allanite high-field strength elements (HFSE) hydrothermal mobility Shuiquangou syenitic complex China
ISSN号	0009-2541
DOI	10.1016/S0009-2541(03)00162-1
文献子类	Article
英文摘要	The Shuiquangou syenitic complex consists of melasyenite and leucosyenite. In the northeastern part, there is a small area where the leucosyenite was affected by alteration. The altered leucosyenite contains much higher concentrations of high-field strength elements (HFSE), especially Nb, Zr, REE and Y compared to fresh leucosyenite. REE patterns of the altered leucosyenite show moderate negative Eu anomaly, in contrast to the slightly positive to non-anomalous Eu signature of the fresh syenitic rocks. Allanite from the hydrothermal mineral assemblage in the altered leucosyenite also contains much higher concentrations of REE and Ti than the euhedral magmatic allanites in unaltered leucosyenite. The enrichment of HFSE in altered leucosyenite was interpreted to be caused by the hydrothermal fluids based on mineral chemistry and whole-rock data. Within the fresh leucosyenite, allanite occurs in two habits, euhedral ones indicating a primary magmatic origin and anhedral ones suggesting a late-magmatic origin. The latter has higher concentrations of REE and Ti than the former. The arthedral allanite was presumed to be formed coeval with the alteration of the euhedral allanite as a result of residual magmatic fluid derived directly from the syenitic magma. The alteration of magmatic euhedral allanite and the enrichment of REE and Ti in the anhedral late-magmatic allanite suggest that these elements were mobilized by the residual magmatic fluid. Both residual late-magmatic and hydrothermal fluids have an inferred composition characterized by high alkalic and F contents, suggesting that F may be the most ligand that complexed the high-valence cations. (C) 2003 Elsevier Science B.V. All rights reserved.
WOS关键词	ELECTRON-MICROPROBE ANALYSIS ; HYDROTHERMAL PROCESSES ; BEARING MINERALS ; STRANGE-LAKE ; ZR ; INCLUSIONS ; MOBILITY ; ALLANITE ; AUREOLE ; RICH
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000184511700008
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/79003]
专题	中国科学院地质与地球物理研究所
通讯作者	Jiang, N
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Akita Univ, Fac Engn & Resource Sci, Akita, Japan
推荐引用方式 GB/T 7714	Jiang, N,Sun, SH,Chu, XL,et al. Mobilization and enrichment of high-field strength elements during late- and post-magmatic processes in the Shuiquangou syenitic complex, Northern China[J]. CHEMICAL GEOLOGY,2003,200(1-2):117-128.
APA	Jiang, N,Sun, SH,Chu, XL,Mizuta, T,&Ishiyama, D.(2003).Mobilization and enrichment of high-field strength elements during late- and post-magmatic processes in the Shuiquangou syenitic complex, Northern China.CHEMICAL GEOLOGY,200(1-2),117-128.
MLA	Jiang, N,et al."Mobilization and enrichment of high-field strength elements during late- and post-magmatic processes in the Shuiquangou syenitic complex, Northern China".CHEMICAL GEOLOGY 200.1-2(2003):117-128.