Fluids inclusion constraints on the origin of the Shiduolong hydrothermal vein-type Mo-Pb-Zn deposit, Qinghai Province

	Fluids inclusion constraints on the origin of the Shiduolong hydrothermal vein-type Mo-Pb-Zn deposit, Qinghai Province
	Li GongJian 1,2; Wang QingFei 1,2; Zhu HePing 3,4; Yuan WanMing 1,2; Gong QingJie 1,2
刊名	ACTA PETROLOGICA SINICA
	2013-04-01
卷号	29 期号:4 页码:1377-1391
关键词	Shiduolong Pb-Zn mining district Hydrothermal Mo-Pb-Zn deposit Fluid inclusion Gas-liquid components Metallogenic model
ISSN号	1000-0569
文献子类	Article
英文摘要	The Shiduolong hydrothermal Mo-Pb-Zn deposit is located in the Xinghai County, northeast of the Qinghai Province. Mineralization is controlled by NNW faults formed in the Indosinian, and closely associated with simultaneous granitoid intrusions. Four stages of hydrothermal ore-forming process are recognized, characterized by mineral assemblages of quartz-molybdenite (I), quartzpyrite- sphalerite (II), quartz-polymetallie sulfides (III) and quartz-carbonate (III), respectively. Two main types of fluid inclusions are distinguished in the hydrothermal quartz, aqueous-rich CO2-H2O inclusions and aqueous inclusions. The later can be further divided into vapor-rich, liquid-rich and pure liquid inclusions. Microthermometic data show that the homogenization temperatures of the fluid inclusions from the stage I to the III are gradually decreased, from 317 similar to 397 degrees C, through 226 similar to 342 degrees C, to 131 similar to 247 degrees C, and the corresponding salinities followed by 9. 98% similar to 12. 28% NaCleqv, 4. 34% similar to 10. 98% NaCleqv and 2. 07% similar to 5. 41% NaCleqv. Plenty of secondary fluid inclusions could be observed in the quartz from the I and the 11 stage, implying intensive fluid superposition subsequently. Study of gas-liquid components of fluid inclusions from different mineralization stages indicates that the ore-forming fluid belongs to K+-Na+-SO42- type, and the content of total ions reduced rapidly from early to late. The gas component contains a relatively high N-2, CH4 and other gases in addition to H2O and CO2. The stage I ore-forming fluid is mainly of magmatic water, hybrid with certain amount of meteoric water. Fluid mixing occurs in the stage II, abundant meteoric water with some formation water mixed into the early stage fluid. Ore-forming fluid of the stage III is mainly of meteoric water and/or formation water. Influence by surface water system is more and more obvious as the evolution of ore-forming fluid. The mixing of fluids and accompanying decrease of temperature and pressure are the dominant mechanisms for deposition and, enrichment of Pb-Zn and other mineralizing elements.
WOS关键词	QUADRUPOLE MASS-SPECTROMETER ; EASTERN TIANSHAN MOUNTAINS ; GOLD DEPOSIT ; ORE-DEPOSITS ; GASEOUS COMPOSITION ; CENTRAL CHINA ; MINERALIZATION ; TRANSITION ; EVOLUTION ; EXAMPLE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000318260300022
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87585]
专题	中国科学院地质与地球物理研究所
通讯作者	Li GongJian
作者单位	1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.China Univ Geosci, Minist Educ, Key Lab Lithosphere Tecton & Lithoprobing Technol, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Key Lab Mineral Resource, Inst Geol, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li GongJian,Wang QingFei,Zhu HePing,et al. Fluids inclusion constraints on the origin of the Shiduolong hydrothermal vein-type Mo-Pb-Zn deposit, Qinghai Province[J]. ACTA PETROLOGICA SINICA,2013,29(4):1377-1391.
APA	Li GongJian,Wang QingFei,Zhu HePing,Yuan WanMing,&Gong QingJie.(2013).Fluids inclusion constraints on the origin of the Shiduolong hydrothermal vein-type Mo-Pb-Zn deposit, Qinghai Province.ACTA PETROLOGICA SINICA,29(4),1377-1391.
MLA	Li GongJian,et al."Fluids inclusion constraints on the origin of the Shiduolong hydrothermal vein-type Mo-Pb-Zn deposit, Qinghai Province".ACTA PETROLOGICA SINICA 29.4(2013):1377-1391.