ISSN 1009-6248CN 61-1149/P Bimonthly

Supervisor:China Geological Survey

Sponsored by:XI'an Center of China Geological Survey
Geological Society of China

    • The Core Journals of China
    • The Key Magazine of China Technology
    • CSCD Included Journals
    • Scopus Included Journals
Advance Search
BAI Xudong, YANG Bo, ZHAO Zhongguo, et al. LA-MC-ICPMS Zircon U-Pb Dating and Geochemical Characteristics of Late Ordovician Volcanic Rocks in Southern Qilian Mountains, Qinghai Province[J]. Northwestern Geology, 2018, 51(1): 125-136.
Citation: BAI Xudong, YANG Bo, ZHAO Zhongguo, et al. LA-MC-ICPMS Zircon U-Pb Dating and Geochemical Characteristics of Late Ordovician Volcanic Rocks in Southern Qilian Mountains, Qinghai Province[J]. Northwestern Geology, 2018, 51(1): 125-136.

LA-MC-ICPMS Zircon U-Pb Dating and Geochemical Characteristics of Late Ordovician Volcanic Rocks in Southern Qilian Mountains, Qinghai Province

More Information
  • Received Date: March 20, 2017
  • Revised Date: October 23, 2017
  • Available Online: July 28, 2022
  • Published Date: March 04, 2018
  • Duosuoqu Formation in the Southern Qilian Mountains is composed of pyroclastic rocks, volcanic lava and sedimentary rocks, and its rock types vary from basalt to dacite, belonging to Calc-alkaline series combination.Using LA-MC-ICPMS zircon U-Pb dating, the authors obtained the 206Pb/238U weighted average age of (449.9 ±1.5)Ma and (449.5 ±1.8)Ma for the first time in the Duoosuo Formation volcanic rocks, which proves that these volcanic rocks were formed in late Ordovician.The results of geochemical analysis show that these volcanic rocks have high Al2O3 and low TiO2, and they are enriched in LILE element (Sr, Rb, Ba), incompatible high field strength elements (U, Th)and LREE (La, Ce), but depleted in Ta, Nb, P, Ti and strong compatible elements (Cr, Ni).These volcanic rocks have relatively high ΣREE, with enrichment LREE, weak positive Eu anomalies to weak negative Eu anomalies.Comprehensive analysis shows that these volcanic rocks were formed in an activity continental margin/island arc environment.
  • 青海省地质矿产局.青海省岩石地层[M].武汉:中国地质大学出版社,1997.
    Bureau of Geology and Mineral Resources.Rock Stratigraphy in Qinghai Province[M].Wuhan:China University of Geosciences Press,1997.
    冯益民,何世平.祁连山大地构造与造山作用[M].北京:地质出版社,1996.
    FENG Yimin,HE Shiping.Geotectonics and Orogeny of the Qilian Mountains[M].Beijing:Geological Publishing House,1996.
    夏林圻,夏祖春,徐学义.北祁连山海相火山岩岩石成因[M].北京:地质出版社,1996.
    XIA Linqi,XIA Zuchun,XU Xueyi.Origin of Marine volcanic Rocks in North Qilian Mountains[M].Beijing:Geological Publishing House,1996.
    夏林圻,李向民,余吉远,等.祁连山新元古代中-晚期至早古生代火山作用与构造演化[J].中国地质,2016,43(4):1087-1138.
    XIA Linqi,LI Xiangmin,YU Jiyuan,et al.Mid-Late Neoproterozoic to Early Paleozoic volcanism and tectonic evolution of the Qilian Mountain[J].Geology in China,2016,43(4):1087-1138.
    李昌年.火成岩微量元素岩石学[M].武汉:中国地质大学出版社,1992.
    LI Changnian.Igneous rock of trace elements[M].Wuhan:China University of Geosciences Press,1992.
    刘肇昌.板块构造学[M].成都:四川科学技术出版社,1985.
    LIU Zhaochang.Plate tectonics[M].Chengdu:Sichuan Science and Technology Press,1985.
    潘桂棠,李兴振,王立全,等.青藏高原及邻区大地构造单元初步划分[J].地质通报,2002,21(11):701-707.
    PAN Guitang,LI Xingzhen,WANG Liquan,et al.Preliminary division of tectonic units of the Qinghai-Tibet Plateau and its adjacent regions[J].Geological Bulletin of China,2002,21(11):701-707.
    赵虹,党犇,王崇礼.甘肃南祁连党河南山中奥陶世火山岩的地球化学特征[J].现代地质,2004,18(1):64-69.
    ZHAO Hong,DANG Ben,WANG Congli.The Geochemical Characteristics of Ordovician Volcanic Rocks in Southern Danghe Mountain in Southern Qilian Mountains,Gansu Province[J].Geoscience,2004,18(1):64-69.
    左国朝,李志林.拉鸡山裂谷带特征及演化[J].甘肃地质学报,2001,10(1):26-31.
    ZUO Guochao,LI Zhilin.Feturesand and Evolution History of Lajishan Rift Zone[J].Acta Geologica Gansu,2001,10(1):26-31.
    冯备战.甘肃南祁连党河南山奥陶纪火山岩的岩石地球化学特征[J].甘肃地质,2006,15(2):15-19.
    FENG Beizhan.Geochemistry of the Ordovician Volcanic Rocks in Southern Danghe Mountains,Southern Qilian Mountains,Gansu Province[J].Gansu Geology,15(2):15-19.
    李怀坤,耿建珍,郝爽,等.用激光烧蚀多接收器等离子体质谱仪(LA-MC-ICPMS)测定锆石U-Pb同位素年龄的研究[J].矿物学报,2009,29(S1):600-601.
    LI Huaikun,GENG Jianzhen,HAO Suang,et al.Study on the LA-MC-ICPMS technique for zircon U-Pb isotopic dating[J].Bulletin of Mineralogy,2009,29(S1):600-601.
    邱家骧,曾广策,王思源,等.青海拉脊山造山带早古生代火山岩[J].西北地质科学,1995,16(2):69-83.
    QIU Jiaxiang,ZENG Guangce,WANG Siyuan,et al.Early Palaeozoic Volcanic Rocks in Laji Mountain Orogenetic Belt,Qinghai Province[J].Northwest Geoscience, 1995,16(2):69-83.
    邓清禄,周雁,杨巍然.拉脊山早古生代火山岩盆地开合演化岩石地球化学标志[J].西北地质科学,1995,16(1):84-91.
    DENG Qinglu,ZHOU Yan,YANG Weiran.Lithogeochemical Sign of the Opening-Closing Evolation of the Volcanic Rock Basin in the Laji Mountains in early Palaeozoic era[J].Northwest Geoscience,1995,16(1):84-91.
    闫臻,王宗起,李继亮,等.西秦岭楔的构造属性及其增生造山过程[J].岩石学报,28(6):1808-1828.
    YAN Zhen,WANG Zongqi,LI Jiliang,et al.Tectonic settings and accretionary orogenesis of the West Qinling Terrane,northeastern margin of the Tibet Plateau[J].Acta Petrologica Sinica,28(6):1808-1828.
  • Related Articles

Catalog

    Article views (2343) PDF downloads (2411) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return