Fluid inclusions and H-O isotopic compositions of quartz-vein ores in the Baiganhu-Jialesai W-Sn mineralization belts, Qimantage, NW China.

CORC > 中国地质调查局 > 中国地质调查局

	Fluid inclusions and H-O isotopic compositions of quartz-vein ores in the Baiganhu-Jialesai W-Sn mineralization belts, Qimantage, NW China.
	Gao, YB (Gao YongBao); Li, WY (Li WenYuan); Zhang, ZW (Zhang ZhaoWei)
刊名	ACTA PETROLOGICA SINICA
	2011
卷号	27 期号:6 页码:1829-1839
关键词	Inclusions H-O isotopes quartz-vein ores W-Sn deposit Baiganhu Jialesai Qimantage
ISSN号	1000-0569
英文摘要	There are three types of fluid inclusions in the quartz of quartz-vein ores, Baiganhu-Jialesai W-Sn mineralization belts, Qimantage; Liquid-rich two-phase inclusions, CO(2) and CH(4)-rich three-phase inclusions and water inclusions, of which the first two types are primary inclusions and are closely related with W-Sn mineralization. The peak homogenized temperatures and salinity of liquid-rich two-phase inclusions in quartz, with liquid component of H(2)O and gas component of CO(2) and CH(4), range from 220 degrees C to 260 degrees C and from 0.88% to 20.82% NaCleqv respectively, the total density of fliuds range from 0. 72 to 1. 06g . cm(-3). The peak homogenized temperatures and salinity of CO(2) and CH(4)-rich three-phase inclusions in quartz range from 260 degrees C to 280 degrees C and from 6.63% to 15.212% NaCleqv respectively, the total density of fliud range from 0. 60 to 0. 91g . cm(-3). The gas components of CO(2) and CH(4)-rich three-phase inclusions are mainly CO(2), CH(4) and less H(2)S, N(2), H(2), while the liquid components are mainly H(2)O and less CO(2), CH(4), H(2)S. The value of delta(18) O(H2O) and delta D of quartz-vein ores range from 4. 02 parts per thousand to 6. 32 parts per thousand and - 75. 5 parts per thousand to - 42. 8 parts per thousand respectively, both of which indicate that the fluid is significantly magmatic water. In all, the initial fluid of quartz-vein ores is from magmatic hydrothermal fluid, which belongs to NaCl-H(2)O-CO(2) system with middle-high temperature (220 similar to 280 degrees C), middle salinity (10% similar to 14% NaCleqv) and lower density. The W-Sn mineralization is closely related with the Caledonian magmatism, and the uneven fluids are captured when the quartz-vein ores formed. The significant factors of forming of quartz-vein ores are immiscibility of ore-forming fluids, and changes of temperature, pressure and value of pH, Eh, f(o2) and f(s2).
学科主题	地质年代学
WOS关键词	TUNGSTEN DEPOSIT ; NATURAL PROCESSES ; CARBON-DIOXIDE ; IMMISCIBILITY ; NEWFOUNDLAND ; JIANGXI ; REGION ; COUNTY ; MISUSE
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000292995600021
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39240]
专题	中国地质调查局
作者单位	Changan Univ, Coll Earth Sci & Resources, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Gao, YB ,Li, WY ,Zhang, ZW . Fluid inclusions and H-O isotopic compositions of quartz-vein ores in the Baiganhu-Jialesai W-Sn mineralization belts, Qimantage, NW China.[J]. ACTA PETROLOGICA SINICA,2011,27(6):1829-1839.
APA	Gao, YB ,Li, WY ,&Zhang, ZW .(2011).Fluid inclusions and H-O isotopic compositions of quartz-vein ores in the Baiganhu-Jialesai W-Sn mineralization belts, Qimantage, NW China..ACTA PETROLOGICA SINICA,27(6),1829-1839.
MLA	Gao, YB ,et al."Fluid inclusions and H-O isotopic compositions of quartz-vein ores in the Baiganhu-Jialesai W-Sn mineralization belts, Qimantage, NW China.".ACTA PETROLOGICA SINICA 27.6(2011):1829-1839.