| 西南天山柯坪推覆构造东段晚第四纪变形样式与缩短速率 |
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| 引用本文： | 冉勇康,杨晓平,徐锡伟,程建武,陈立春.西南天山柯坪推覆构造东段晚第四纪变形样式与缩短速率[J].地震地质,2006,28(2):179-193. |
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| 作者姓名： | 冉勇康 杨晓平 徐锡伟 程建武 陈立春 |
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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： | 柯坪推覆构造的变形量和变形速率对于认识中国大陆的地球动力学过程有重要意义,但晚第四纪以来的变形特征与缩短速率是众多研究中的薄弱环节。文中通过大量的野外调查、探槽开挖、变形地貌面实测与阶地堆积物的测年,分析了柯坪推覆构造普昌断裂以东部分的晚第四纪变形样式、变形量和缩短速率。晚第四纪以来,研究区在地表和近地表的变形主要通过2种形式表现出来:低角度逆断层运动和新褶皱的弯曲变形。这些变形主要由最新地貌面的隆升和缩短来实现。研究区存在2个变形强度大的地段,缩短速率西段为1·32mm/a;东段为1·39mm/a
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| 关 键 词： | 柯坪推覆构造 晚第四纪 变形样式 缩短速率 |
| 文章编号： | 0253-4967（2006）02-0179-15 |
| 收稿时间： | 2006-05-29 |
| 修稿时间： | 2006-06-05 |
DEFORMATION PATTERN AND SHORTENING RATES IN THE EAST PART OF KALPIN THRUST SYSTEM IN SOUTHWEST TIANSHAN DURING LATE QUATERNARY |
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| RAN Yong-kang,YANG Xiao-ping,XU Xi-wei,CHENG Jian-wu,CHEN Li-chun.DEFORMATION PATTERN AND SHORTENING RATES IN THE EAST PART OF KALPIN THRUST SYSTEM IN SOUTHWEST TIANSHAN DURING LATE QUATERNARY[J].Seismology and Geology,2006,28(2):179-193. |
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| Authors: | RAN Yong-kang YANG Xiao-ping XU Xi-wei CHENG Jian-wu CHEN Li-chun |
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| Affiliation: | Institute of Geology , China Earthquake Administration, Beijing 100029, China |
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| Abstract: | Less attention has been paid to the deformation pattern, shortening amount and shortening rate in late Quaternary across Kalpin thrust system. This paper tries to discuss them, mainly in the eastern part of the thrust system by doing field investigation along the faults and folds, measuring geomorphic deformation, excavating trenches in some important sites where young alluvial fans were displaced obviously and dating young deposits of alluvial terrace. There are two types of deformation in surface and nea |
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| Keywords: | Kalpin thrust system late Quaternary deformation pattern shortening rate |
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