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Zircon U-Pb geochronology and geochemistry of Early-Middle Jurassic intrusions in the Daheishan ore district, NE China: Petrogenesis and implications for Mo mineralization
Guo, Yunpeng1,2; Zeng, Qingdong1,2,3; Yang, Jinhui1,2,3; Guo, Feng4; Guo, Weikang1,2; Liu, Jianming1,2,3
2018-10-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume165Pages:59-78
AbstractTwo types of Jurassic intrusive rocks have been recognized in the Daheishan ore district, northeastern China, according to new SIMS zircon U-Pb ages, whole-rock major and trace element abundances, and Sr-Nd-Pb isotopic compositions. The first type is represented by biotite granite and monzogranite, with zircon U-Pb dating yielding ages from 182 to 175 Ma. These rocks are high-K calc-alkaline series, and span from metaluminous to weakly peraluminous. They exhibit enrichment in large ion lithophile elements (LILEs) and depletion in high field strength elements (HFSEs), with significant negative Eu anomalies, low (La/Yb)(N) and Sr/Y ratios. They have low (Sr-87/Sr-86); ratios of 0.70202-0.70474, positive epsilon(Nd)(t) values of 1.7-2.3, and Nd model ages (T-DM2) of 826-771 Ma as well as ((206)pb/(204)pb)(i) values of 18.400-18.494. These arc-like geochemical characteristics suggest that the Early Jurassic intrusions were formed by the partial melting of a mixture of dominated juvenile component and pre-existing crust in a subduction zone setting. The second type is represented by diorite and granodiorite, with zircon U-Pb ages of 172-170 Ma. These Middle Jurassic intrusive rocks are high-K calc-alkaline and mainly metaluminous, with high Mg-# (> 29) and elevated (La/Yb)(N) and Sr/Y ratios. They display similar whole-rock Sr-Nd-Pb isotopic compositions ((Sr-87/Sr-86)(i) = 0.70432-0.70480, epsilon(Nd)(t) = 1.7-2.3, (Pb-206/Pb-204)(i) = 18.3016-18.4531) to the Early Jurassic granites. Their adakitic geochemical compositions suggest that they formed at pressures greater than 15 kbar by the partial melting of thickened lower crust with a juvenile component. We further propose that the tectonic setting of the Zhangguangcai Range in the Early Jurassic might be a back-arc related to the subduction of the Paleo-Pacific Plate, and that subduction stopped temporarily in the Middle Jurassic due to the presence of over-thickened continental crust. The prolonged Jurassic adakitic magmatism and concomitant fluid activities may have played important roles in the formation of the porphyry Mo deposits in the Daheishan ore district.
KeywordSIMS zircon U-Pb geochronology Sr-Nd-Pb isotopes Jurassic magmatism Daheishan ore district
DOI10.1016/j.jseaes.2018.04.033
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China
WOS KeywordMESOZOIC VOLCANIC-ROCKS ; LOWER CONTINENTAL-CRUST ; ND ISOTOPIC EVIDENCE ; ASIAN OROGENIC BELT ; NORTH CHINA ; JILIN PROVINCE ; TECTONIC IMPLICATIONS ; MOLYBDENUM DEPOSITS ; TRACE-ELEMENT ; NORTHEASTERN CHINA
Language英语
Funding ProjectNational Natural Science Foundation of China[41390443] ; National Key Research Project of China[2017YFC0601306] ; Major State Basic Research Program of China[2013 CB429804]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research Project of China ; National Key Research Project of China ; Major State Basic Research Program of China ; Major State Basic Research Program of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000449447300004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/89424
Collection矿产资源研究院重点实验室
Corresponding AuthorGuo, Yunpeng
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Guo, Yunpeng,Zeng, Qingdong,Yang, Jinhui,et al. Zircon U-Pb geochronology and geochemistry of Early-Middle Jurassic intrusions in the Daheishan ore district, NE China: Petrogenesis and implications for Mo mineralization[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,165:59-78.
APA Guo, Yunpeng,Zeng, Qingdong,Yang, Jinhui,Guo, Feng,Guo, Weikang,&Liu, Jianming.(2018).Zircon U-Pb geochronology and geochemistry of Early-Middle Jurassic intrusions in the Daheishan ore district, NE China: Petrogenesis and implications for Mo mineralization.JOURNAL OF ASIAN EARTH SCIENCES,165,59-78.
MLA Guo, Yunpeng,et al."Zircon U-Pb geochronology and geochemistry of Early-Middle Jurassic intrusions in the Daheishan ore district, NE China: Petrogenesis and implications for Mo mineralization".JOURNAL OF ASIAN EARTH SCIENCES 165(2018):59-78.
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