| 肃北野马河北侧断裂地貌特征及其晚第四纪活动性 |
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| 引用本文： | 赵朋,闵伟,焦德成,孙宗诗,黄拓.肃北野马河北侧断裂地貌特征及其晚第四纪活动性[J].地震地质,2009,31(3):459. |
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| 作者姓名： | 赵朋 闵伟 焦德成 孙宗诗 黄拓 |
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| 作者单位： | 1. 中国地震局地质研究所,北京,100029
2. 宁夏回族自治区地震局,银川,750001 |
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| 基金项目： | 国家科技支撑计划项目 |
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| 摘 要： | 阿尔金活动断裂带东段的滑动速率由西向东逐渐减小,而肃北是阿尔金断裂东段滑动速率的"突变点"之一。在肃北以东分布多条分支断裂,野马河北侧断裂便是其中的一条。野马河北侧断裂长约30km,总体走向NEE,该断裂沿野马河盆地北侧山前洪积扇延伸,沿断裂具有大量的左旋走滑和逆冲等地貌现象,多处冲沟出露有断层剖面。野外调查结果表明该断裂是一条左旋走滑兼逆冲断裂,错断了晚更新世时期形成的洪积扇或冲沟阶地。通过实测得到地貌面左旋、垂直错动数据,并采集样品测试相关地貌面的年龄,估算该断裂晚更新世以来的平均水平滑动速率为(1.27±0.18)mm/a,平均逆冲速率为(0.4±0.07)mm/a,该断裂分解了阿尔金断裂东段的部分运动量
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| 关 键 词： | 野马河北侧断裂 左旋走滑 逆冲 速率 晚第四纪 |
GEOMORPHOLOGIC CHARACTER AND QUATERNARY ACTIVITY OF THE NORTH OF YEMAHE FAULT IN SUBEI |
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| ZHAO Peng,MIN Wei,JIAO De-cheng,SUN Zong-shi,HUANG Tuo.GEOMORPHOLOGIC CHARACTER AND QUATERNARY ACTIVITY OF THE NORTH OF YEMAHE FAULT IN SUBEI[J].Seismology and Geology,2009,31(3):459. |
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| Authors: | ZHAO Peng MIN Wei JIAO De-cheng SUN Zong-shi HUANG Tuo |
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| Abstract: | The slip rate decreased at Subei,Shibaocheng and Shulehe regions on the eastern segment of Altyn Fault,the regions called as "singularity points". Subei is one of "singularity points" on the eastern segment of Altyn Fault,and the north of Yemahe Fault in the northeast of Subei is the fault we study in this paper. The fault is located in the northeast of Yemahe Basin. It starts at Erdaogou gully in the east and ends at Niujuan gully,extending along the Yema mountain front and parallel to the Altyn Fault in t |
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| Keywords: | the north of Yemahe Fault left-lateral strike-slip thrust rate late Quaternary |
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