| 甘肃马衔山北缘断裂西北段几何结构及其新活动 |
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| 引用本文： | 宋方敏,袁道阳,陈桂华,程建武,张兰凤,何文贵,葛伟鹏,苏鹤军,陆斌.甘肃马衔山北缘断裂西北段几何结构及其新活动[J].地震地质,2006,28(4):547-560. |
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| 作者姓名： | 宋方敏 袁道阳 陈桂华 程建武 张兰凤 何文贵 葛伟鹏 苏鹤军 陆斌 |
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| 作者单位： | 1. 中国地震局地质研究所,北京,100029
2. 中国地震局兰州地震研究所,兰州,730000 |
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| 基金项目： | 国家发展与改革委员会发改投资项目 |
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| 摘 要： | 甘肃马衔山北缘断裂在大地构造上属昆仑—祁连—秦岭加里东-华力西造山系,其西北段位于兰州中生代盆地内部。通过对该段的1∶10000条带状地质填图,弄清了其几何结构,获取了新活动时代、活动性质的若干地质地貌证据和年龄证据。结果表明,该段断裂由咸水沟—马泉沟、新城沟和青石咀3小段构成,其中咸水沟—马泉沟小段晚更新世—全新世活动,活动性质以左旋走滑为主,新城沟和青石咀两小段晚更新世以来未见活动。全新世晚期以来,咸水沟—马泉沟小段的左旋位移量5～8m,位移速率0.5～1.72mm/a
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| 关 键 词： | 马衔山北缘断裂 几何结构 活动时代 活动性质 位移速率 |
| 文章编号： | 0253-4967（2006）04-0547-14 |
| 收稿时间： | 2006-07-04 |
| 修稿时间： | 2006-10-27 |
GEOMETRIC STRUCTURES AND RECENT ACTICVITY ALONG THE NORTHWEST SEGMENT OF NORTH MARGINAL FAULT OF MAXIANSHAN MOUNTAINS,GANSU PROVINCE |
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| SONG Fang-min,YUAN Dao-yang,CHEN Gui-hua,CHENG Jian-wu,ZHANG Lan-feng,HE Wen-gui,GE Wei-peng,SU He-jun,LU Bin.GEOMETRIC STRUCTURES AND RECENT ACTICVITY ALONG THE NORTHWEST SEGMENT OF NORTH MARGINAL FAULT OF MAXIANSHAN MOUNTAINS,GANSU PROVINCE[J].Seismology and Geology,2006,28(4):547-560. |
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| Authors: | SONG Fang-min YUAN Dao-yang CHEN Gui-hua CHENG Jian-wu ZHANG Lan-feng HE Wen-gui GE Wei-peng SU He-jun LU Bin |
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| Affiliation: | 1. Institute of Geology, China Earthquake Administration, Beijing 100029, China; 2. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China |
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| Abstract: | The Maxianshan north marginal fault belongs tectonically to the Kunlun-Qilian-Qinling Caledo～nian-Variscan orogenic belt.The northwest segment of the fault locates within the Mesozoic Lanzhou basin,consisting of Xianshuigou-Maquangou,Xinchenggou and Qingshizui sub-segments.The Xianshuigou-Maquangou sub-segment is 7km in length,and comprises two sub-parallel faults,having a general strike of 290°～300°,dipping NE or SW at an angle of 60° or more.The faults dissect mainly the Cretaceous system,and locally act |
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| Keywords: | Maxianshan north marginal fault geometry recent activity timing of recent activity displacement rate |
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