| 西南天山柯坪塔格前缘断裂带东段晚第四纪活动特征 |
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| 引用本文： | 程建武,冉勇康,杨晓平,徐锡伟.西南天山柯坪塔格前缘断裂带东段晚第四纪活动特征[J].地震地质,2006,28(2):258-268. |
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| 作者姓名： | 程建武 冉勇康 杨晓平 徐锡伟 |
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| 作者单位： | 中国地震局地质研究所,北京,100029 |
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| 摘 要： | 柯坪塔格前缘断裂东段是柯坪推覆构造系前缘的一条活动断裂,野外调查获得了其晚第四纪错断洪积扇、冲沟阶地面的证据,实测了变形地貌面上的断层陡坎,分析了断层的形变量,通过采样测年估算了断层的缩短速率。由7个观测点的断层陡坎剖面测量,计算了观测点处断层的水平缩短速率,结果表明,断裂弧顶部位的五道班、三间房以西及其大山口道班附近,断层错断了Ⅰ级和Ⅱ级洪积扇(阶地)。断层在这些地点最新活动强烈,水平缩短平均速率全新世以来为0·35~0·44mm/a,更新世晚期末以来为0·16~0·30mm/a,而在非弧顶部位的巴楚磷矿、三岔口以北及大山口北断层只错断了更新世晚期Ⅲ级洪积扇,且水平缩短速率较小,断层水平缩短平均速率更新世晚期以来为0·05~0·07mm/a
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| 关 键 词： | 柯坪塔格 逆冲断裂 晚第四纪 断层陡坎 |
| 文章编号： | 0253-4967（2006）02-0258-11 |
| 收稿时间： | 2005-09-23 |
| 修稿时间： | 2006-06-08 |
CHARACTER OF LATE QUATERNARY ACTIVITY OF THE EAST SEGMENT OF THE FRONT-EDGE FAULTS OF KALPINTAG |
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| CHENG Jian-wu,RAN Yong-kang,YANG Xiao-ping,XU Xi-wei.CHARACTER OF LATE QUATERNARY ACTIVITY OF THE EAST SEGMENT OF THE FRONT-EDGE FAULTS OF KALPINTAG[J].Seismology and Geology,2006,28(2):258-268. |
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| Authors: | CHENG Jian-wu RAN Yong-kang YANG Xiao-ping XU Xi-wei |
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| Institution: | Institute of geology, China earthquake administration, Beijing 100029, China |
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| Abstract: | Based on a lot of outcrop geological surveys, we discussed the thrust fault belt in the front of the east section of Kalpintag in Kalpin area and found many evidences, including the fault incising the surface of diluvium and fluvial channel sediments and terraces, and also the fracture and subsection character of the faults. The evidences indicate that the frontal fault of the Kalpintag is an active thrust-fault of low angle. According to the interpretation and analysis of the satellite image and field inve |
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| Keywords: | Kalpintag thrust fault late Quaternary fault scarp |
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