中国地质调查局西安地质调查中心主办
高级检索

北祁连奥陶纪抠门子组火山岩特征及构造意义

,  ,  ,  , 

文章导航 > 西北地质 > 2015 > 48(1): 26-36

上一篇

下一篇

杨运军, 张锋军, 杨克俭, 张小明, 王明志. 北祁连奥陶纪抠门子组火山岩特征及构造意义[J]. 西北地质, 2015, 48(1): 26-36.
引用本文: 杨运军, 张锋军, 杨克俭, 张小明, 王明志. 北祁连奥陶纪抠门子组火山岩特征及构造意义[J]. 西北地质, 2015, 48(1): 26-36.
shu
YANG Yunjun, ZHANG Fengjun, YANG Kejian, ZHANG Xiaoming, WANG Mingzhi. Characteristics and Tectonic Significance of the Volcanic Rock in Ordovician Koumenzi Formation, North Qilian Orogen[J]. Northwestern Geology, 2015, 48(1): 26-36.
Citation: YANG Yunjun, ZHANG Fengjun, YANG Kejian, ZHANG Xiaoming, WANG Mingzhi. Characteristics and Tectonic Significance of the Volcanic Rock in Ordovician Koumenzi Formation, North Qilian Orogen[J]. Northwestern Geology, 2015, 48(1): 26-36.
shu

北祁连奥陶纪抠门子组火山岩特征及构造意义

  • 1.

    中国地质大学(北京), 北京 100083;陕西省地质调查中心, 陕西 西安 710065

  • 2.

    陕西省地质调查中心, 陕西 西安 710065

  • 基金项目: “青海省刚察县热水地区区域地质矿产调查”(KD2011-3-9)

Characteristics and Tectonic Significance of the Volcanic Rock in Ordovician Koumenzi Formation, North Qilian Orogen

  • 1.

    China University of Geosciences, Beijing 100083, Beijing, China;Shaanxi Center of Geological Survey, Xi'an 710065, Shaanxi, China

  • 2.

    Shaanxi Center of Geological Survey, Xi'an 710065, Shaanxi, China

    摘要
  • 青海省祁连县武松塔拉一带发育奥陶纪抠门子组,以构造岩片形式与周围地层呈断层或不整合接触,在抠门子组下段发育一套岩浆喷发序列组成的中-基性火山岩建造,岩石类型以安山岩、玄武岩为主,其次为英安质、安山质及玄武质火山碎屑岩.经过野外调查和岩石化学分析表明:安山岩总体为高铝富钠的碱性火山岩系列,其微量元素和稀土元素分配型式具有岛弧玄武岩特征 (VAB);玄武岩总体为次铝富钠碱性火山岩系列,其微量元素和稀土元素分配型式和混染的大洋玄武岩(MORB)特征相似.抠门子组火山岩具有2种截然不同的岩石地球化学特征,构造环境分析具有混染的大洋盆地和岛弧双重属性,这些大洋玄武岩及岛弧火山岩的出现标志着中—晚奥陶世北祁连洋壳的俯冲消减事件,该火山活动为北祁连早古生代构造演化研究提供了依据.
    The Ordovician Koumenzi formation located in south Wusongtala of Qilian county exists as a tectonic slice confined by ductile and brittle faults, and enclosed in surrounding strata. The lower unit of this formation is composed of a set of intermediate-mafic volcanic layers bearing a clear magmatic eruption sequence, with lithologies of andesite, basalt and less dacitic, andesitic and basaltic pyroclastics. Field investigation and geochemical analyses indicate that the andesite is high aluminum and sodium alkaline volcanic rock; its trace element and the REE characteristics exhibits oceanic island-arc basalt features (VAB). Basalt combination in general belongs to poor aluminum and high sodium alkaline basalt series, which bears similarities to contaminated oceanic basalt(MORB) in terms of trace elements and the REE characteristics. The volcanic rocks of Koumenzi formation have two distinct lithogeochemical characteristics. Analysis on the tectonic setting show dual attributes of contaminated ocean basin and island arc. The occurrence of oceanic basalt and island arc volcanic rock implicate subduction event of oceanic crust of north Qilian in Middle-Late Ordovician. The volcanic activity record provides evidence for tectonic evolution of North Qilian in Early Paleozoic.
    • HTML全文
  • 加载中
    • 参考文献(24)

  • 潘桂堂,王立全,李荣社,等.多岛弧盆系构造模式-认识大陆地质的关键[J].沉积与特提斯地质,2012,32(3):1-20.

    PAN GT,WANG LQ,LI RS, et al.Tectonic model of archipelagic arc-basin systems:The key to the continental gellogy[J],Sedimentary geology and Tethyan Geology,2012, 32(3):1-20.

    闫臻,李继亮,雍拥,等.北祁连石灰沟奥陶纪碳酸盐岩-硅质岩形成的构造环境[J]. 岩石学报,2008,24(12):2384-2394.

    YAN Z,LI JL,YONG Y, et al. Tectonic environment of Ordovician carbonate-cherts in the Shihuigou area,North Qilian orogen[J]. Acta Petrologica Sinica,2008,24(10):2384-2394.

    夏林圻,夏祖春,徐学义.北祁连山奥陶纪弧后火山岩浆成因[J].中国地质,2003,30(1):48-60.

    XIA LQ,XIA ZCh,XU XY.Magmagenesis of Ordovician back-arc basins in the Northern Qilian Moutains[J].Geology in China, 2003,30(1):48-60.

    杜远生,朱杰,韩 欣等.从弧后盆地到前陆盆地-北祁连造山带奥陶纪-泥盆纪的沉积盆地与构造演化[J].地质通报,2004,23(9-10):911-917.

    DU YSH,ZHU J,HAN X, et al.From the back-arc basin to foreland basin-Ordovician Devonian sedimentary basin and tectonic evolution in the North Qilian orogenic belt.Geological Bulletin of China, 2004,23(9-10):911-917.

    夏林圻,夏祖春,徐学义.北祁连山早古生代洋脊-洋岛和弧后盆地火山作用[J].地质学报,1998,72(4):301-312.

    XIA LQ,XIA ZCh,XU XY.Early Palaeozoic Mid-Ocean Ridge-Ocean Island and Back-Arc Basin Volcanism in the North Qilian Mountains[J].Acta Geologica Sinica,1998,72(4):301-312.

    张建新,孟繁聪. 北祁连和北阿尔金含硬柱石榴辉岩: 冷洋壳俯冲作用的证据[J].科学通报,2006,51(10): 1238-1244.

    ZHANG JX, MENG, FC. Lawsonite-bearing eclogites in the north Qilian and north Altyn Tagh: evidence for cold subduction of oceanic crust[J]. Chinese Science Bulletin, 2006, 51(10): 1238-1244.

    杜远生,朱杰,顾松竹.北祁连永登石灰沟奥陶纪硅质岩地球化学特征及大地构造意义[J].地质论评,2006,52(2):184-189.

    DU Yuansheng, ZHU Jie, GU Songzhu. Sedimentary geochemistry of chert from the Middle-Upper Ordovician in Shihuigou area, North Qilian orogenic belt and its tectonic implication[J]. Geological Review,2006, 52(2):184-189.

    拜永山. 1[DK]∶25万门源县幅区域地质调查报告[R].青海省地质调查院,2007.

    BAI YSh. regional geological survey report of 1:250000 Menyuan county[R].Qinghai geological survey, 2007.

    左国朝,吴汉泉.北祁连中段早古生代双向俯冲-碰撞增生模式剖析[J].地球科学进展,1997,12(4):315-323.

    ZUO GCh,WU HQ.Two-way hyperplasia of subduction-collision model analysis in earl y Paleozoic of Center North Qilian[J]. Advances in Earth Science.1997,12(4):315-323.

    宋述光.北祁连俯冲杂岩带的构造演化[J].地球科学进展,1997,12(4):351-365.

    SONG ShG.Tectonic evolution of subductive complex belts in the North Qilian Mountains[J]. Advances in Earth Science. 1997,12(4):351-365.

    徐学义,赵江天,李向民,等.北祁连山早古生代硅质岩稀土元素特征及其构造意义[J].地质科技情报,2003,22(3):22-26.

    XU XY,ZHAO JT,LI XM, et al.Rare earth elements in siliceous rocks from North Qilian Mountains:Implications for tectonic environment[J].Geological Science and Technology Information, 2003,22(3):22-26.

    张彦杰,黄增宝.北祁连西段香毛山一带早-中寒武基性火山岩基本特征及其成因[J]. 西北地质,2003,36(1):58-62.

    ZHANG YD,HUANG ZB.Basic features and genesis of the early-middle Cambrian epoch volcanics in the Xiangmaoshan district of western part of Northern Qilian[J].North-wesyern Geollgy, 2003,36(1):58-62.

    • 相关文章
  • 施引文献
  • 资源附件(0)
  • 加载中
计量
  • 文章访问数:  2539
  • PDF下载数:  2278
  • 施引文献:  0
出版历程
收稿日期:  2014-12-11
修回日期:  2015-02-01
刊出日期:  2015-03-15

目录

    版权所有：中国地质调查局发展研究中心 copyright @2020
    返回