Geochemistry of fluid inclusions in the Axi gold deposit, West Tianshan, Xinjiang

	Geochemistry of fluid inclusions in the Axi gold deposit, West Tianshan, Xinjiang
	Zhang ZuoHeng 1; Mao JingWen 1; Wang ZhiLiang 1; Zuo GuoChao 2; Chen WeiShi 1; Zhu HePing 3; Wang LongSheng 1; Lue LinSu 4
刊名	ACTA PETROLOGICA SINICA
	2007-10-01
卷号	23 期号:10 页码:2403-2414
关键词	fluid inclusion geochemistry Axi gold deposit Xinjiang
ISSN号	1000-0569
文献子类	Article
英文摘要	Based on a systematical summing-up of the previous research on the geological characteristics and ore fluid processes of the Axi gold deposit, the authors carried out supplemental measurements of homogeneous and freezing temperatures and salinities of fluid inclusions in quartz, calcite and barite formed in the quartz-carbonate mineralization stage of the hydrothermal mineralization period, gas chromatographic analysis of quartz samples and analysis of REE and trace elements in fluid inclusion in quartz. The results show that the Axi gold deposit has the characteristics of typical epithermal gold deposits. The salinities of ore-forming fluids are in general very low, mostly clustering on 0.53 to 1.57 wt% NaCl equivalent. The ore-forming fluids are mainly composed of H, 0, CO, and CH,. The trace elements in the fluid inclusions inherited those in country rocks. The relatively high contents of trace elements such as Cu, Ni, Co, Mo, Zn, Pb, V, Sb and Li may reveal that these elements were rather easy to enter the fluids during the water-rock reaction. The Sigma REE of the fluid inclusions in quartz range from 13825 x 10(-12) to 149935 x 10(-12), and the LREE/HREE ratios vary from 2.63 to 50.83. Err displays slight depletion with delta Eu ranging from 0.70 to 0.91. The ore fluids in the fluid inclusions display the same Eu depletion and right-inclined chondrite-normalized REE distribution patterns as the host volcanic rocks of the Axi gold deposit. This may suggest that the ore fluids in the inclusions might inherit the features of REE of the early-stage volcanic rocks. However, the LREE/HREE ratios of the ore fluids are higher than those of the volcanic rocks: the BEE distribution patterns for the former are more right-inclined than those for the latter, which may be related to the change in composition of the ore-forming fluids caused by mixing of metamorphic and meteoric water in the late stage.
WOS关键词	RARE-EARTH-ELEMENTS ; MINERALIZATION ; QUARTZ ; CHINA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000254139000009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/68356]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang ZuoHeng
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 2.Gansu Inst Geol Survey, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Geol Museum China, Beijing 100034, Peoples R China
推荐引用方式 GB/T 7714	Zhang ZuoHeng,Mao JingWen,Wang ZhiLiang,et al. Geochemistry of fluid inclusions in the Axi gold deposit, West Tianshan, Xinjiang[J]. ACTA PETROLOGICA SINICA,2007,23(10):2403-2414.
APA	Zhang ZuoHeng.,Mao JingWen.,Wang ZhiLiang.,Zuo GuoChao.,Chen WeiShi.,...&Lue LinSu.(2007).Geochemistry of fluid inclusions in the Axi gold deposit, West Tianshan, Xinjiang.ACTA PETROLOGICA SINICA,23(10),2403-2414.
MLA	Zhang ZuoHeng,et al."Geochemistry of fluid inclusions in the Axi gold deposit, West Tianshan, Xinjiang".ACTA PETROLOGICA SINICA 23.10(2007):2403-2414.