干旱区生态环境知识资源中心(Arid): Genesis and fluid evolution of the Huangtan Au-Cu deposit in the Kalatag district, Eastern Tianshan, NW China: Constraints from geology, geochronology, fluid inclusions, and H-O-S-Pb isotope geochemistry

Arid

DOI	10.1016/j.oregeorev.2021.104408
	Genesis and fluid evolution of the Huangtan Au-Cu deposit in the Kalatag district, Eastern Tianshan, NW China: Constraints from geology, geochronology, fluid inclusions, and H-O-S-Pb isotope geochemistry
	Sun, Bingke; Ruan, Banxiao; Lv, Xinbiao; Dai, Zhihui; Mao, Chen
通讯作者	Ruan, BX (corresponding author), China Univ Geosci, 388 Lumo Rd, Wuhan, Peoples R China.
来源期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
EISSN	1872-7360
出版年	2021
卷号	138
英文摘要	The newly discovered Huangtan Au-Cu deposit is located in the central Dananhu - Tousuquan arc of Eastern Tianshan, southern Central Asian Orogenic Belt (CAOB). It is the first Au-dominated volcanogenic massive sulfide (VMS) polymetallic deposit in the Eastern Tianshan. Veinlet-disseminated and massive orebodies are hosted within Early Silurian pyritic phyllic tuff and volcanic breccia and controlled by a secondary fracture zone of the Kalatag fault with extensive hydrothermal alteration. Four primary alteration/mineralization stages have been recognized as follows: (1) Early ore stage (S1), forming mainly ore-barren fine quartz veins with minor gold-bearing sulfides; (2) main ore stage (S2), forming mainly thick quartz veins with abundant coarse-grained subhedral pyrite (S2-1), and plentiful chalcopyrite, sphalerite, barite and Au-bearing sulfide veins (S2-2); (3) late ore stage (S3), which is characterized by plenty of barren quartz-calcite veins with few sulfides; and (4) supergene stage (S4), accompanied by abundant oxide mineralization, including malachite, jarosite and other supergene minerals. From S1 to S3, microthermometric data of fluid inclusions show homogenization temperatures of 263-379 degrees C (mean = 308 degrees C), 188-292 degrees C (mean = 240 degrees C), and 118-198 degrees C (mean = 158 degrees C), respectively, and salinities of 5.3-14.2 (mean = 10.8) wt.% NaCl equiv., 2.8-10.7 (mean = 7.6) wt.% NaCl equiv., and 0.3-14.1 (mean = 2.6) wt.% NaCl equiv., respectively. The ore-forming fluids are characterized by middle-low temperature, low salinity, relatively reduced condition, and an H2O-NaCl + CO2 + CH4 system. The delta S-34 values (-5.25 parts per thousand to 0.50 parts per thousand) and Pb isotopic ratios (Pb-206/Pb-204 = 17.868-19.495, Pb-207/Pb-204 15.446-15.575, and Pb-208/Pb-204 = 37.350-38.491) suggest that the ore-forming materials came predominantly from a deep-seated magma source with a minor contribution of lower continental crust. The delta O-18(H2O) and delta Dv- smow values of fluid inclusions in each metallogenic stage range from -6.1 to 5.6 parts per thousand and -66.8 to -53.9 parts per thousand, respectively, suggesting the dominant role of magmatic water mixed with convectively circulating heated seawater during fluid evolution. Fluid cooling dilution, local boiling, and fluid mixing were considered as the main mechanisms of metal precipitation. The Ar-40-Ar-39 plateau age of hydrothermal muscovite from the late ore stage (S3) is 414.4 +/- 0.4 Ma, which represents the upper limit age of shallow hydrothermal alteration and Au-Cu mineralization. It is also consistent with the Early Silurian polymetallic metallogenic event in the Kalatag district. The auriferous Huangtan and adjacent Cu-Zn-rich Huangtupo VMS deposits show obvious ore-forming element differences, and constitute a unique VMS metallogenic system in the Eastern Tianshan Orogenic Belt (ETOB), which provides an important research object and new insight for ore prospecting in the peripheral Gobi Desert area.
英文关键词	Huangtan deposit Fluid inclusions Stable isotopes Ar-Ar geochronology VMS-type Au-Cu mineralization Eastern Tianshan
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000697273100001
WOS关键词	PORPHYRY MO DEPOSIT ; TECTONIC IMPLICATIONS ; HYDROTHERMAL SYSTEM ; SULFIDE DEPOSITS ; SULFUR ISOTOPES ; NORTHWEST CHINA ; COPPER-DEPOSIT ; OROGENIC BELT ; GOLD DEPOSIT ; ZN DEPOSIT
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364269
作者单位	[Sun, Bingke; Lv, Xinbiao; Mao, Chen] China Univ Geosci, Fac Earth Resources, Wuhan 430074, Peoples R China; [Ruan, Banxiao; Lv, Xinbiao] China Univ Geosci, Inst Geol Survey, Wuhan 430074, Peoples R China; [Dai, Zhihui] Chinese Acad Sci, Inst Geochem, State Key Lab Deposit Geochem, Guiyang 550081, Peoples R China
推荐引用方式 GB/T 7714	Sun, Bingke,Ruan, Banxiao,Lv, Xinbiao,et al. Genesis and fluid evolution of the Huangtan Au-Cu deposit in the Kalatag district, Eastern Tianshan, NW China: Constraints from geology, geochronology, fluid inclusions, and H-O-S-Pb isotope geochemistry[J],2021,138.
APA	Sun, Bingke,Ruan, Banxiao,Lv, Xinbiao,Dai, Zhihui,&Mao, Chen.(2021).Genesis and fluid evolution of the Huangtan Au-Cu deposit in the Kalatag district, Eastern Tianshan, NW China: Constraints from geology, geochronology, fluid inclusions, and H-O-S-Pb isotope geochemistry.ORE GEOLOGY REVIEWS,138.
MLA	Sun, Bingke,et al."Genesis and fluid evolution of the Huangtan Au-Cu deposit in the Kalatag district, Eastern Tianshan, NW China: Constraints from geology, geochronology, fluid inclusions, and H-O-S-Pb isotope geochemistry".ORE GEOLOGY REVIEWS 138(2021).