Zircon U-Pb geochronology and geochemistry of Early-Middle Jurassic intrusions in the Daheishan ore district, NE China: Petrogenesis and implications for Mo mineralization
文献类型：期刊论文
| 作者 | Guo, Yunpeng1,2; Zeng, Qingdong1,2,3; Yang, Jinhui1,2,3; Guo, Feng4; Guo, Weikang1,2; Liu, Jianming1,2,3 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 165页码:59-78 |
| 关键词 | SIMS zircon U-Pb geochronology Sr-Nd-Pb isotopes Jurassic magmatism Daheishan ore district |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2018.04.033 |
| 英文摘要 | Two 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. |
| WOS关键词 | MESOZOIC VOLCANIC-ROCKS ; LOWER CONTINENTAL-CRUST ; ND ISOTOPIC EVIDENCE ; ASIAN OROGENIC BELT ; NORTH CHINA ; JILIN PROVINCE ; TECTONIC IMPLICATIONS ; MOLYBDENUM DEPOSITS ; TRACE-ELEMENT ; NORTHEASTERN CHINA |
| 资助项目 | National Natural Science Foundation of China[41390443] ; National Key Research Project of China[2017YFC0601306] ; Major State Basic Research Program of China[2013 CB429804] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000449447300004 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | 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 ; 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 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/89424]  |
| 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 | Guo, Yunpeng |
| 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.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地质与地球物理研究所
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