Geochronology and geochemistry of Mesozoic dykes in the Qingchengzi ore field, Liaoning Province, China: Magmatic evolution and implications for ore genesis

doi:10.1002/gj.3646

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

	Geochronology and geochemistry of Mesozoic dykes in the Qingchengzi ore field, Liaoning Province, China: Magmatic evolution and implications for ore genesis
	Sun, Guotao 1,2,3; Zeng, Qingdong 1,2,3; Wang, Yongbin 1,2; Li, Bin 4; Chen, Peiwen 1,2,3
刊名	GEOLOGICAL JOURNAL
	2019-09-12
页码	19
关键词	Hf isotopes Liaodong Peninsula mantle evolution Mesozoic intrusive rocks polymetallic mineralization zircon U-Pb ages
ISSN号	0072-1050
DOI	10.1002/gj.3646
英文摘要	The Qingchengzi Pb-Zn-Au-Ag-Mo polymetallic ore field located in the Liaodong Peninsula, Liaoning Province, China, is spatially associated with multiple magmatism, which provide a classic example for studying the multiple tectonic and metallogenetic events. In this paper, we report some new geochemical and geochronological data of igneous rocks in the Qingchengzi ore field, including diabase, lamprophyre, microdiorite, granite porphyry, and quartz porphyry. Zircon U-Pb dating yielded the formation ages of these rocks as Triassic, Jurassic, and Early Cretaceous. Low-Mg adakitic granite porphyries formed at 233 Ma have zircon epsilon(Hf)(t) values of -17.7 to -14.5, suggesting that they were mainly derived from partial melting of thickened lower crust. Mafic dykes formed during 226-203 Ma have zircon epsilon(Hf)(t) values of -28.6 to -12.8, suggesting that they were mainly derived from partial melting of ancient lithospheric mantle. Zircons from the 168Ma Jurassic diabase have high Nb/Ta and low Nb/Th ratios, with zircon epsilon(Hf)(t) values of -25.2 to -18.5. This suggests that ancient lithospheric mantle was influenced by melts/fluids from the subducted Palaeo-Pacific Plate. The Early Cretaceous microdiorites (126 Ma) are high-Mg adakite rocks, with zircon epsilon(Hf)(t) values of -27.3 to -19.6. Melting of delaminated eclogitic lower crust might produce these high-Mg adakitic microdiorites. The upwelling asthenosphere could heat the residual lower crust to form the quartz porphyries. The Early Cretaceous diabase (100 Ma) shows low Nb/Ta and high Nb/Th ratios, with zircon epsilon(Hf)(t) values of -0.7 to 5.8, implying a depleted mantle source. The characteristics of Triassic-Cretaceous intermediate-mafic intrusions show that the lithospheric mantle evolved from enriched ancient mantle to depleted juvenile mantle. This transformation of the lithospheric mantle might have resulted from the delamination of the lower crust that was caused by subduction of the Palaeo-Pacific Plate. Based on the field observation and geochemical data, Au, Pb-Zn-Ag, Mo mineralization in the Qingchengzi ore field show closely spatial and genetic relationship with intrusive rocks, indicating that the Mo, Pb-Zn-Ag mineralization might be related to the Jurassic magmatic activity, whereas Au mineralization related to the Early Cretaceous magma.
资助项目	Cultivation Project for National Excellent Youth of Yunnan University[2018YDJQ009] ; Research Startup Project for Introduced Talent of Yunnan University[YJRC4201804] ; State Key Laboratory of Lithospheric Evolution[S201605] ; National Key R&D Program of China[2016YFC0600101] ; National Key R&D Program of China[2016YFC0600108]
WOS关键词	ZIRCON U-PB ; HF ISOTOPIC COMPOSITIONS ; LIAODONG PENINSULA ; CRATONIC LITHOSPHERE ; CRUSTAL EVOLUTION ; CONTINENTAL-CRUST ; INTRUSIVE ROCKS ; TRACE-ELEMENTS ; OCEANIC-CRUST ; GOLD PROVINCE
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000486192200001
资助机构	Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Cultivation Project for National Excellent Youth of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; Research Startup Project for Introduced Talent of Yunnan University ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Key R&D Program of China ; National Key R&D Program 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/132A11/93702]
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	Zeng, Qingdong
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beituchengxilu 19, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Liaoning Qingchengzi Lead Min Corp, Dandong, Peoples R China
推荐引用方式 GB/T 7714	Sun, Guotao,Zeng, Qingdong,Wang, Yongbin,et al. Geochronology and geochemistry of Mesozoic dykes in the Qingchengzi ore field, Liaoning Province, China: Magmatic evolution and implications for ore genesis[J]. GEOLOGICAL JOURNAL,2019:19.
APA	Sun, Guotao,Zeng, Qingdong,Wang, Yongbin,Li, Bin,&Chen, Peiwen.(2019).Geochronology and geochemistry of Mesozoic dykes in the Qingchengzi ore field, Liaoning Province, China: Magmatic evolution and implications for ore genesis.GEOLOGICAL JOURNAL,19.
MLA	Sun, Guotao,et al."Geochronology and geochemistry of Mesozoic dykes in the Qingchengzi ore field, Liaoning Province, China: Magmatic evolution and implications for ore genesis".GEOLOGICAL JOURNAL (2019):19.