• 中文核心期刊
  • 中国科技核心期刊
  • 中国科学引文数据库核心期刊
Quick Search Issue Search Advanced Search
QIN Jiang-feng, LAI Shao-cong, ZHANG Guo-wei, DIWU Chun-rong, LI Yong-fei. 2008: Zircon LA-ICP-MS U-Pb dating of the Longkang ignimbrite in the Jiuzhaigou area, Sichuan, China: Evidence of the westward extension of the Mianlüe suture. Geological Bulletin of China, 27(3): 345-350. DOI: 10.12097/gbc.20080305
Citation: QIN Jiang-feng, LAI Shao-cong, ZHANG Guo-wei, DIWU Chun-rong, LI Yong-fei. 2008: Zircon LA-ICP-MS U-Pb dating of the Longkang ignimbrite in the Jiuzhaigou area, Sichuan, China: Evidence of the westward extension of the Mianlüe suture. Geological Bulletin of China, 27(3): 345-350. DOI: 10.12097/gbc.20080305
shu

Zircon LA-ICP-MS U-Pb dating of the Longkang ignimbrite in the Jiuzhaigou area, Sichuan, China: Evidence of the westward extension of the Mianlüe suture

  • State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi′an 710069, Shaanxi, China;2. Shenyang Institute of Geology and Mineral Resources, China Geological Survey, Shenyang 110032, Liaoning, China

More Information
    Graphical Abstract
    • Abstract
  • A suite of metasedimentary-volcanic rocks exposed in the Kangxian-Pipasi-Nanping tectonic zone is closely related to the tectonic evolution of the Mianlüe ocean. Andesitic ignimbrite and tuffite nearly a hundred meters thick are exposed at the eastern end of the Tazang-Longkang section in the western segment of the Kangxian-Pipasi-Nanping tectonic belt. An ignimbrites sample (JZG-L) was collected near Yazagou at the eastern end of the Tazang-Longkang section, from which more than one hundred zircon grains were selected. The zircon LA-ICP-MS U-Pb analysis shows that the zircons are of typical magmatic origin with oscillatory zoning, higher U (35×10-6-750×10-6), Th (31×10-6-717×10-6) and Th/U (0.44-1.30). The 206Pb/238U ratios are in good agreement with the analytical precision, yielding a weighted mean age of 246.2±2.8 Ma (MSWD=2.6; n=12, 2 σ). Some detrital zircons have also been observed, which have the oldest concordia age of 2481±33 Ma, indicating the existence of Precambrian basement in the Jiuzhaigou area. According the regional geology and characteristics volcanic rocks in the study area, the 246.2±2.8 Ma zircon U-Pb age suggests the occurrence of Late Permian orogenic volcanism and provides important isotope geochronological evidence for the westward extension of the Mianlüe suture to the Nanping area.
    • FullText(HTML)
    • References (0)
    • Related Articles

  • Related Articles

    MENG Yong, TANG Shulan, LI Xiangmin, LI Yanguang, BU Tao. 2018: LA-ICP-MS zircon U-Pb dating of the Early Silurian clastic rocks in Dacaotan of Jiayuguan, North Qilian orogenic belt. Geological Bulletin of China, 37(4): 734-746. DOI: 10.12097/gbc.dztb-37-4-734
    WANG Bin, WANG Yong, CHEN Bailin, CHEN Zhengle, WU Yu, MENG Lingtong, HE Jiangtao, WANG Yugang, HAN Meimei, QI Wanxiu, LIU Bing, ZHAO Lei. 2017: LA-ICP-MS zircon U-Pb dating of Paleoproterozoic pluton in northern Altun area and its geological implications. Geological Bulletin of China, 36(6): 964-976. DOI: 10.12097/gbc.dztb-36-6-964
    LIU Yin, LI Rong-she, JI Wen-hua, PAN Shu-juan, CHEN Fen-ning, ZHANG Hai-di. 2014: The pairing relationship between ophiolite and arc volcanic rocks along western Jinsha River suture zone and its geological significance: Evidence from geochemistry and LA-ICP-MS zircon U-Pb dating. Geological Bulletin of China, 33(7): 1076-1088. DOI: 10.12097/gbc.20140715
    ZHANG Xiang-fei, LI You-guo, CAO Xiao-min, QU Xiao-ming, XIN Hong-bo, WANG Jian, DU De-dao. 2014: LA-ICP-MS zircon U-Pb age and geochemical characteristics of the acid intrusive rocks in the western part of Bangong Lake-Nujiang River suture zone. Geological Bulletin of China, 33(7): 984-994. DOI: 10.12097/gbc.20140706
    ZHONG Yun, XIA Bin, LIU Wei-liang, XIA Lian-ze, XIA Zhong-Yu, WANG Li-hong. 2013: LA-ICP-MS zircon U-Pb age and genesis of Longbucun granite in Southern Gangdise Belt, Tibet. Geological Bulletin of China, 32(9): 1362-1370. DOI: 10.12097/gbc.20130905
    LI Fen-qi, LIU Wei, ZHANG Shi-zhen, WANG Bao-di. 2012: LA-ICP-MS zircon U-Pb dating and geochemical characteristics of Zhula intrusion in eastern Gangdise, Tibet. Geological Bulletin of China, 31(9): 1420-1434. DOI: 10.12097/gbc.20120907
    LI Ting, XU Xue-yi, CHEN Jun-lu, WANG Hong-liang, LI Zhi-pei, ZHANG Xin. 2012: LA-ICP-MS zircon U-Pb dating and tectonic setting of Zhongchuan intrusion, Lixian area, western Qinling orogen. Geological Bulletin of China, 31(6): 875-883. DOI: 10.12097/gbc.20120606
    LIU Wei, LI Fen-qi, YUAN Si-hua, ZHUO Jie-wen, ZHANG Wan-ping, LIANG Ting. 2010: Zircon LA-ICP-MS U-Pb age of ignimbrite from Zenong Group in Coqen area of the central Gangdese belt, Tibet, China.. Geological Bulletin of China, 29(7): 1009-1016. DOI: 10.12097/gbc.20100706
    Chen N S, Ba J, Zhang L, Su W, Liu J B, Guo S. 2009: Zircon LA-ICP-MS U-Pb dating of the Wuguan Group, Shangdan fault zone, eastern Qinling, China. Geological Bulletin of China. Geological Bulletin of China, 28(5): 556-560. DOI: 10.12097/gbc.20090503
    2004: Mianlue paleo-suture on the southern margin of the Central Orogenic System in Qinling-Dabie with a discussion of the assembly of the main part of the continent of China. Geological Bulletin of China, 23(9): 846-853. DOI: 10.12097/gbc.200409155

Catalog

    Get Citation
    PDF
    XML
    Article views (2002) PDF downloads (793) Cited by()
    Turn off MathJax
    Article Contents
    Abstract
    Related Articles

    Copyright © 2023 ditorial Department of Geological Bulletin of China

    Address：45 Fuwai Street, Xicheng District, Beijing China Geological Survey Development Research Center  Postal Code：100037

    Tel：010-58584206；010-58584208；010-58584208  Email：dzhtb@263.net

    Supported by: Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return