Fluid evolution and mineralization mechanism of the East Kounrad porphyry Mo-W deposit in the Balkhash metallogenic belt, Central Kazakhstan

doi:10.1016/j.jseaes.2018.07.013

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Fluid evolution and mineralization mechanism of the East Kounrad porphyry Mo-W deposit in the Balkhash metallogenic belt, Central Kazakhstan
	Cao, Chong 1,2,3; Shen, Ping 1,2,3; Pan, Hongdi 4; Li, Changhao 1,2,3; Eleonora, Seitmuratova 5
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2018-10-01
卷号	165 页码:175-191
关键词	High fluorine High oxygen fugacity Mineralization stages Precipitation mechanism Pb isotopic compositions East Kounrad Mo-W deposit
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2018.07.013
英文摘要	The East Kounrad Mo-W deposit is located in the eastern part of the Balkhash metallogenic belt, Central Kazakhstan. The intrusion in the East Kounrad deposit is a Permain complex that includes medium- and fine-grained granites. Both the primary magma and hydrothermal fluids of the East Kounrad deposit are characterized by high fluorine and high oxygen fugacity, which would be important for the formation of high-grade large Mo deposit. Four mineralization stages are identified in this study. Stage I quartz-wolframite +/- molybdenite +/- fluorite veins, which were associated with intensively greisen alteration, were formed from fluids with high temperature (340-460 degrees C), high pressure (250-400 bars), high/low salinity (54.5 wt% and 3.4-10.2 wt%, respectively), and high oxygen fugacity with a fluid system of H2O-NaCl-CO2. Stage II quartz-molybdenite +/- pyrite veins, which were accompanied by K-feldspars-muscovite-fluorite alteration, were formed from fluids with medium-high temperature (260-400 degrees C), medium pressure (100-250 bars), high/low salinity (39.1-58.4 wt% and 2.4-11.7 wt%, respectively), and relatively low oxygen fugacity. After the main stage of W and Mo mineralization, stage HI quartz-pyrite +/- molybdenite veins, associated with quartz-sericite alteration, were formed from fluids with medium-low temperature (160-340 degrees C), low pressure (less than 100 bars), various salinity (4.5-46.2 wt%) and high oxygen fugacity. Stage IV quartz-polymetallic sulfide veins, related to argillic alteration, were formed under temperature of 120-220 degrees C and salinity of 1.7-8.1 wt%. Remarkably, fluid boiling is the most important precipitation mechanism of molybdenite and wolframite. In addition, the decreasing oxygen fugacity and temperature also play a vital role in triggering deposition of molybdenite. The Pb isotopic composition of sulfides shows that the ore-forming materials at East Kounrad are dominantly derived from the lower crust.
资助项目	National Natural Science Foundation of China[41390442] ; National Natural Science Foundation of China[U1303293] ; National Natural Science Foundation of China[41272109] ; National Key R&D Program of China[2017YFC0601201]
WOS关键词	ASIAN OROGENIC BELT ; FREEZING-POINT DEPRESSION ; ZIRCON U-PB ; NW CHINA ; GEOLOGICAL SIGNIFICANCE ; MOLYBDENUM DEPOSIT ; TECTONIC EVOLUTION ; CHEMICAL EVOLUTION ; GRANITIC MAGMAS ; MOUNT-PLEASANT
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000449447300011
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89462]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者	Shen, Ping
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Changan Univ, Coll Earth Sci, Xian 710054, Shaanxi, Peoples R China 5.K Satpaev Inst Geol Sci, Lab Geol Format, Alma Ata 050010, Kazakhstan
推荐引用方式 GB/T 7714	Cao, Chong,Shen, Ping,Pan, Hongdi,et al. Fluid evolution and mineralization mechanism of the East Kounrad porphyry Mo-W deposit in the Balkhash metallogenic belt, Central Kazakhstan[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,165:175-191.
APA	Cao, Chong,Shen, Ping,Pan, Hongdi,Li, Changhao,&Eleonora, Seitmuratova.(2018).Fluid evolution and mineralization mechanism of the East Kounrad porphyry Mo-W deposit in the Balkhash metallogenic belt, Central Kazakhstan.JOURNAL OF ASIAN EARTH SCIENCES,165,175-191.
MLA	Cao, Chong,et al."Fluid evolution and mineralization mechanism of the East Kounrad porphyry Mo-W deposit in the Balkhash metallogenic belt, Central Kazakhstan".JOURNAL OF ASIAN EARTH SCIENCES 165(2018):175-191.