中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Geochemistry of metamorphosed volcanic rocks in the Neoarchean Qingyuan greenstone belt, North China Craton: Implications for geodynamic evolution and VMS mineralization

文献类型:期刊论文

作者Peng, Zidong1,2; Wang, Changle1,2; Zhang, Lianchang1,2,3; Zhu, Mingtian1,2,4; Tong, Xiaoxue1,2,3
刊名PRECAMBRIAN RESEARCH
出版日期2019-06-15
卷号326页码:196-221
ISSN号0301-9268
关键词Geochemistry Volcanic rocks Neoarchean Geodynamic evolution VMS mineralization Qingyuan greenstone belt
DOI10.1016/j.precamres.2017.12.033
英文摘要The Qingyuan greenstone belt (QGB) situated in the northeastern section of the North China Craton (NCC) is considered to be the unique metallogenic province in China that hosts both banded iron formations (BIFs) and volcanogenic massive sulfide (VMS) deposits. Traditionally, the QGB is divided into the Hunbei and Hunnan terranes separated by the Hunhe fault and grouped into the lower Shipengzi, middle Hongtoushan, and upper Nantianmen formations, which have undergone amphibolite- to granulite-facies metamorphism. Exposed supracrustal rocks are composed of plagioclase amphibolite and biotite plagioclase gneiss with minor amounts of BIF, marble, and schist. In this study, detailed field and petrographic observations, lithogeochemical, U-Pb geochronological, as well as whole-rock Sm-Nd isotope analyses were conducted on the metamorphosed mafic and felsic volcanic rocks (i.e. plagioclase amphibolite and biotite plagioclase gneiss, respectively) in the QGB in order to discuss implications for tectonic evolution and comitant VMS mineralization. The supracrustal rocks of both Hunbei and Hunnan regions were formed synchronously from 2.57 to 2.53 Ga and then had undergone 2.52-2.48 Ga regional metamorphism. Specifically, the lower section of the Shipengzi Formation is composed dominantly of transitional-tholeiitic basalts with negative Nb anomalies, suggesting that they were likely generated by partial melting of a mantle source that was previously altered by variable amounts of slab-derived fluids or melts. In contrast, the lithologic assemblages grade upward into interlayered bimodal volcanic rocks (i.e. N-MORB-type tholeiitic basalts and FI- to FII-type dacites of transitional to calc-alkalic affinities), representing a change in tectonic regime related to subduction from compression to extension. Among them all the basalts are characterized by consistently positive initial Nd compositions (epsilon(Nd)(t) = +2.7 to +3.4) further indicate a depleted mantle source; whereas those dacites possess negative to positive initial Nd values (epsilon(Nd)(t) = -4.6 to +3.0), suggesting they were formed by partial melting of depleted mafic source (likely lower mafic crust) and accompanied with variable addition of old crustal material. Significantly, VMS deposits are genetically linked to this extensional event and closely associated with the FII-type dacites that were generated by higher melting degree at high-temperature conditions and shallow crustal level (likely 10-15 km). In all, geochemical features (e.g., negative Nb anomalies and epsilon(Nd) value), together with contamination from continental crusts for tholeiitic mafic rocks and inherited zircons from these volcanic rocks, imply a continental arc setting where the QGB was evolved.
WOS关键词MASSIVE SULFIDE DEPOSITS ; U-PB GEOCHRONOLOGY ; LU-HF ISOTOPES ; TRACE-ELEMENT GEOCHEMISTRY ; ANSHAN-BENXI AREA ; CU-ZN DEPOSIT ; CRUSTAL GROWTH ; LIAONING PROVINCE ; YILGARN CRATON ; METAVOLCANIC ROCKS
资助项目National Natural Science Foundation of China[41572076] ; National Natural Science Foundation of China[41602085] ; Major State Basic Research Programme of the People's Republic of China[2012CB416601]
WOS研究方向Geology
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000469157300012
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China ; Major State Basic Research Programme of the People's Republic of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/92276]  
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Wang, Changle; Zhang, Lianchang
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 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Shandong Univ Sci & Technol, Inst Earth Sci & Engn, Qingdao 266510, Shandong, Peoples R China
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Peng, Zidong,Wang, Changle,Zhang, Lianchang,et al. Geochemistry of metamorphosed volcanic rocks in the Neoarchean Qingyuan greenstone belt, North China Craton: Implications for geodynamic evolution and VMS mineralization[J]. PRECAMBRIAN RESEARCH,2019,326:196-221.
APA Peng, Zidong,Wang, Changle,Zhang, Lianchang,Zhu, Mingtian,&Tong, Xiaoxue.(2019).Geochemistry of metamorphosed volcanic rocks in the Neoarchean Qingyuan greenstone belt, North China Craton: Implications for geodynamic evolution and VMS mineralization.PRECAMBRIAN RESEARCH,326,196-221.
MLA Peng, Zidong,et al."Geochemistry of metamorphosed volcanic rocks in the Neoarchean Qingyuan greenstone belt, North China Craton: Implications for geodynamic evolution and VMS mineralization".PRECAMBRIAN RESEARCH 326(2019):196-221.

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来源:地质与地球物理研究所

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