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Neoproterozoic granitic gneiss offshore the Shandong Peninsula of Eastern China: the eastward extension of the Sulu Orogenic Belt
Yue, Baojing1,2; Zhang, He3; Liao, Jing1,2; Ding, Xue1,2; Yin, Xuebo4
2017-06-01
发表期刊INTERNATIONAL GEOLOGY REVIEW
卷号59期号:8页码:1015-1027
文章类型Article
摘要The Sulu Orogenic Belt in eastern China has experienced a multistage tectonic evolutionary history. However, its geological evolution has not yet been corroborated by sufficient direct evidence from basement rocks. Chaolian Island on the Qianliyan Uplift provides an opportunity to study the formation and evolution of the Sulu Orogenic Belt using direct geochronological and geochemical evidence. We determined that the characteristic mineral assemblage in the study region is quartz + K-feldspar + perthite + biotite + muscovite. The samples are silica- (SiO2=72.8%-75.8%) and alkali-rich (ALK(Na2O+K2O)=8.7%-9.3%), with high iron-magnesium ratios (FeO*/(FeO*+MgO)=0.92-0.96) and low CaO and MgO concentrations. Furthermore, they are rich in large-ion lithophile elements K, Rb, Ba, and U, but depleted in high field strength elements Nb, Ta, and Zr. They exhibit high Ga/Al values (Ga x 10(4)/Al=3.33-3.74) and significant fractionation between light and heavy rare earth elements. The samples are A-type granites. In the discrimination diagrams for granite genesis types, the samples plotted in the post-orogenic A2-type granite region. Secondary ion mass spectrometer (SIMS) zircon U-Pb dating results indicated that the granitic gneiss formed similar to 782.6-802.3Ma (Middle Neoproterozoic), consistent with the timing of the breakup of the Rodinia supercontinent on the northeastern margin of the Yangtze Plate. Comparing geochemical characteristics and zircon U-Pb ages of the A-type granitic gneisses of the Sulu Orogenic Belt, the Qianliyan Uplift appears to be an extension of the belt across the ocean and is affiliated with the Yangtze Plate. The granitic gneiss on Chaolian Island is related to the formation of a mantle superplume during the breakup of Rodinia, and the northeastern margin of the Yangtze Plate during the Middle Neoproterozoic was located in a back-arc extension setting induced by the subduction of oceanic plates.
关键词A-type Granitic Gneiss Geochemistry Neoproterozoic Sulu Orogenic Belt Zircon Age
DOI10.1080/00206814.2016.1250127
收录类别SCI
语种英语
WOS记录号WOS:000399575900006
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136701
专题海洋地质与环境重点实验室
作者单位1.Qingdao Inst Marine Geol, Key Lab Marine Hydrocarbon Resources & Environm G, Minist Land & Resources, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
3.Univ Sci & Technol China, Sch Earth & Space Sci, Key Lab Crust Mantle Mat & Environm, Hefei, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
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Yue, Baojing,Zhang, He,Liao, Jing,et al. Neoproterozoic granitic gneiss offshore the Shandong Peninsula of Eastern China: the eastward extension of the Sulu Orogenic Belt[J]. INTERNATIONAL GEOLOGY REVIEW,2017,59(8):1015-1027.
APA Yue, Baojing,Zhang, He,Liao, Jing,Ding, Xue,&Yin, Xuebo.(2017).Neoproterozoic granitic gneiss offshore the Shandong Peninsula of Eastern China: the eastward extension of the Sulu Orogenic Belt.INTERNATIONAL GEOLOGY REVIEW,59(8),1015-1027.
MLA Yue, Baojing,et al."Neoproterozoic granitic gneiss offshore the Shandong Peninsula of Eastern China: the eastward extension of the Sulu Orogenic Belt".INTERNATIONAL GEOLOGY REVIEW 59.8(2017):1015-1027.
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