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主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    天水渭北地区的变质花岗岩类地质特征

    李永军, 李注苍, 付国民, 李英

    李永军, 李注苍, 付国民, 等. 天水渭北地区的变质花岗岩类地质特征[J]. 西北地质, 2004, 37(3): 1-6.
    引用本文: 李永军, 李注苍, 付国民, 等. 天水渭北地区的变质花岗岩类地质特征[J]. 西北地质, 2004, 37(3): 1-6.
    LI Yong-jun, LI Zhu-cang, FU Guo-ming, et al. Geological features of the metamorphic granitoids in the north area of Weihe river in Tianshui,Gansu[J]. Northwestern Geology, 2004, 37(3): 1-6.
    Citation: LI Yong-jun, LI Zhu-cang, FU Guo-ming, et al. Geological features of the metamorphic granitoids in the north area of Weihe river in Tianshui,Gansu[J]. Northwestern Geology, 2004, 37(3): 1-6.

    天水渭北地区的变质花岗岩类地质特征

    Geological features of the metamorphic granitoids in the north area of Weihe river in Tianshui,Gansu

    • 摘要: 天水渭北地区地处祁连与北秦岭造山带结合部位.通过详细的岩石学特征、接触关系、形变及变质特征研究,从变质地层中识别和解体出众多的变质花岗岩体.主要成岩期及代表性岩类有:中元古界为片麻状花岗闪长岩-二长花岗岩,震旦纪为片理化闪长岩.采用多种构造判别图解,获得了重要的构造环境信息.中元古界的花岗岩类是板块碰撞前过渡性结晶基底上局部熔融花岗岩类.震旦纪花岗岩类与板块碰撞作用密切有关,是碰撞造山—碰撞后抬升这一过程形成的花岗岩类.花岗岩类记录了祁连地块与秦岭地块碰撞的重要证据.
      Abstract: The north area of Weihe River is located in the joint of the Qilian-North Qinling orogenic belt.Based on studying in detail of the petrology,contact relation,deformation,metamorphism and so on,the metamorphic granitoids can be recognized and brokenup from metamorphic terrane.The main diagenetic stage and relevant rock types are the Middle Proterozoic assemblage of gneissoid granodiorite-adamellite and the Sinian schistosity diorates.The important information about the tectonic environments was obtained obtained from the discrimination diagram.The Middle Proterozoic granitoids was an intraplate type producted in transitinal crystalline basement before plate collision.The Sinian granitoids are immediately related the plate collision,they were formed int he plate collision mounain-building period-post collision elevation period.The import ant evidence of plates collision of the granitoids are recorded between Qilian and North Qinlingin.
    • 张二朋,牛道韫,霍有光,等.1:100万秦岭-大巴山及邻区地质图及说明书[M].北京:地质出版社,1992.

      张维吉,孟宽恂,胡建民,等.祁连-北秦岭造山带结合部位构造特征与造山过程[M].西安:西北大学出版社,1994.

      霍福臣,李永军.西秦岭造山带的建造与地质演化[M],西安:西北大学出版社,1996.

      Huofuchen,Liyongjun.Geological evolution of the West Qinling orogenic Belt[J].Acta geological Gansu,1996(5):1,1-24.

      Liyongjun,Huofuchen.Tectonic-genetic types of the intrusive rocks in the eistern part of West Qinling[J].Acta geological Gansu,1996(5)1:47-66.

      高秉章,洪大为,郑基俭,等.花岗岩类区1:5万区域地质填图方法指南[M].武汉:中国地质大学出版社,1991.

      肖庆辉,邓晋福,马大全,等.花岗岩研究与思维方法[M],北京:地质出版社,2002.

      Pearce A J etc.Trance element discriminiation diagram for the tectonic interpretation of granitic rocks[J].Journal of petrology,1984,25:part 4,956-983.

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    出版历程
    • 收稿日期:  2004-03-08
    • 修回日期:  2004-04-29
    • 发布日期:  2004-09-04

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