| 北祁连山东段瞭高山构造拼贴体的发现及其意义 |
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| 引用本文： | 闫海卿,钱壮志,刘继庆,张铭杰,肖林,霍勤知.北祁连山东段瞭高山构造拼贴体的发现及其意义[J].兰州大学学报(自然科学版),2005,41(3):10-13. |
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| 作者姓名： | 闫海卿 钱壮志 刘继庆 张铭杰 肖林 霍勤知 |
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| 作者单位： | 中国地质大学,地球科学与资源学院,北京,100083;长安大学,地球科学与国土资源学院,陕西,西安,710054;长安大学,地球科学与国土资源学院,陕西,西安,710054;兰州大学,资源环境学院,甘肃,兰州,730000;甘肃省地勘局,第三地质矿产勘查院,甘肃,兰州,730050 |
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| 基金项目： | 中国地质调查局地质调查项目，"中国超大型镍铜铂岩浆硫化物矿床预测研究"资助项目 |
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| 摘 要： | 瞭高山构造拼贴体的发现对于确定祁连造山带东段中祁连地块北部边界有重大意义.该拼贴体由奥陶系火山岩、大理岩和中晚元古代皋兰岩群绢云石英片岩、变杂砂岩、千枚岩等不同时代地层块体拼贴而成,形成于新元古代末-早古生代.整体成层无序,韧性剪切变形强烈.其变形序列特征反映早期正向逆冲,晚期压剪平移-正向伸展的造山拼贴过程.
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| 关 键 词： | 祁连山东段 构造拼贴体 构造变形 演化特征 |
| 文章编号： | 0455-2059(2005)03-0010-04 |
| 修稿时间： | 2004年7月13日 |
Discovery of the Liaogaoshan tectonic melange belt in the eastern Qilian orogenic belt and its geological significance |
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| YAN Hai-qing,QIAN Zhuang-zhi,LIU Ji-qing,ZHANG Ming-jie,XIAO Lin,HUO Qin-zhi.Discovery of the Liaogaoshan tectonic melange belt in the eastern Qilian orogenic belt and its geological significance[J].Journal of Lanzhou University(Natural Science),2005,41(3):10-13. |
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| Authors: | YAN Hai-qing QIAN Zhuang-zhi LIU Ji-qing ZHANG Ming-jie XIAO Lin HUO Qin-zhi |
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| Abstract: | Discovery of the tectonic melange belt in Liaogaoshan is significant in confirming the north boundary of mid-Qilian massif in the eastern section of Qilian Collision Belt. The melange belt contains Ordovician volcanics and marble, mid-late Proteroloic Gaolan rock group sericite-quartz schist, metamorphose melange sandstone and phyllite et al, which were formed from the end of neoproteroloic to neopaleozoic. The integer stratification shows no order and the ductile shear deformations are intense. The character of deformation series reflects orogenic amalgamation procession of positive thrust in the early period and press-shear parallel movement and positive extension in the later period. |
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| Keywords: | east part of Qilian mountains melange belt structural deformations character of evolution |
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