| 柯坪塔格推覆体的新生代变形与扩展 |
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| 引用本文： | 宋方敏,闵伟,韩竹军,徐锡伟.柯坪塔格推覆体的新生代变形与扩展[J].地震地质,2006,28(2):224-233. |
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| 作者姓名： | 宋方敏 闵伟 韩竹军 徐锡伟 |
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| 作者单位： | 中国地震局地质研究所,100029,北京 |
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| 摘 要： | 柯坪塔格推覆体位于天山西南麓。新生代以来,由于印度板块与欧亚板块的碰撞,天山晚古生代褶皱和断裂构造重新复活隆起,并向南北两侧推挤,在前陆盆地中渐进式地形成多排褶皱-逆断裂带。文中讨论了皮羌近SN向断裂带以西推覆体的新生代变形与扩展特征。结果表明,推覆体的新生代变形为波浪式差异性隆起。从天山南侧到塔里木盆地方向,构成推覆体的各排褶皱-逆断裂带的形成顺序有先后之分,早期形成的靠近天山,晚期形成的靠近塔里木盆地,反映推覆体在形成过程中由北向南的扩展,其扩展距离最大约76km。除此之外,各排褶皱-逆断裂带前缘都由多条断裂组成,它们与褶皱伴生,具有不同的形成和新活动时代。早期形成的断裂靠近山地一侧,晚期形成的断裂靠近盆地一侧,反映褶皱-逆断裂带单排前缘断裂也具有由北向南扩展的性质,其扩展距离为100~500m。最后,对推覆体扩展的形成机制进行了讨论
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| 关 键 词： | 柯坪塔格 推覆体 褶皱-逆断裂带 变形与扩展 |
| 文章编号： | 0253-4967（2006）02-0224-10 |
| 收稿时间： | 2005-07-18 |
| 修稿时间： | 2005-10-25 |
CENOZOIC DEFORMATION AND PROPAGATION OF THE KALPINTAG FOLD NAPPE |
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| SONG Fang-min,MIN Wei,HAN Zhu-jun,XU Xi-wei.CENOZOIC DEFORMATION AND PROPAGATION OF THE KALPINTAG FOLD NAPPE[J].Seismology and Geology,2006,28(2):224-233. |
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| Authors: | SONG Fang-min MIN Wei HAN Zhu-jun XU Xi-wei |
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| Affiliation: | Institute of Geology, China Earthquake Administration, Beijing 100029, China |
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| Abstract: | The Kalpintag fold nappe is located at the northwestern foot of the Tianshan Mountains. Since Cenozoic, owing to the Indian-Eurasian collision, the Mesozoic fold structures of Tianshan have been rejuvenated, uplifted and pushed northward and westward. As a result, several rows of fold-reverse fault zones have been progressively formed within the foreland basins. This paper describes in detail the Cenozoic deformation features and propagation of the fold-reverse fault zone on the west of the nearly south-north-trending Piqiang fault zone. The results show that the Cenozoic deformation of the nappe was characterized by wavy differential uplift, and this has caused the successive formation of the fold-reverse fault zone from the southern side of the Tianshan Mountains to the Tarim Basin. Among them, the early-formed folds are close to the Tianshan Mountains, while the latter-formed folds are close to the Tarim Basin, indicating the general tendency of northward propagation of the fold-reverse fault zone during their formation process. The distance of propagation may reach up to 76km. Moreover, the front of individual fold-reverse fault zone consists of several fault strands, which are associated with folds and have different ages of formation and time of recent activity. The early-formed faults are close to the Mountain side and the latter-formed close to the basin, indicating the northward propagation of the frontal faults of the individual fold. The distance of propagation is about 100 - 500m. The mechanism of the propagation of the fold-reverse fault zone is discussed in this paper as well. |
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| Keywords: | Kalpintag Nappe fold-reverse fault zone deformation and propagation |
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