| 忻定盆地晚更新世晚期的一次构造运动 |
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| 引用本文： | 任俊杰,张世民.忻定盆地晚更新世晚期的一次构造运动[J].地震地质,2006,28(3):487-496. |
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| 作者姓名： | 任俊杰 张世民 |
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| 作者单位： | 中国地震局地壳应力研究所,北京,100085 |
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| 基金项目： | 地震科学联合基金;中国地震局地壳应力研究所科研基金 |
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| 摘 要： | 忻定盆地是山西地堑系北部的一个张性断陷盆地,第四纪构造运动活跃。野外调查表明,盆地内晚更新世晚期经历了一次较强的构造运动,它使得断块山地进一步抬升,中止了末次冰期鼎盛期的一次河流加积过程,位于断裂上升盘的洪积扇扇顶部分也被抬升为洪积台地,山前形成了十几米到几十米的断层陡崖;构造运动还导致断层上升盘河流下切,形成了Ⅱ级阶地。黄土-古土壤时间标尺和多种方式的测年结果表明这次构造运动开始于距今2万年左右
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| 关 键 词： | 忻定盆地 晚更新世晚期 构造运动 断层崖 |
| 文章编号： | 0253-4967（2006）03-0487-10 |
| 收稿时间： | 2005-12-09 |
| 修稿时间： | 2006-08-25 |
A TECTONIC MOVEMENT DURING LATER STAGE OF LATE PLEISTOCENE EPOCH IN THE XINDING BASIN |
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| REN Jun-jie,ZHANG Shi-min.A TECTONIC MOVEMENT DURING LATER STAGE OF LATE PLEISTOCENE EPOCH IN THE XINDING BASIN[J].Seismology and Geology,2006,28(3):487-496. |
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| Authors: | REN Jun-jie ZHANG Shi-min |
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| Institution: | Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China |
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| Abstract: | The Xinding basin in the north of Shanxi rift system is a normal fault-controlled extensional graben and has a strong neotectonic process during the Quaternary. Our field investigations in the Xinding basin indicate that there is a united geomorphologic surface, composed of the terrace T_2,the diluvial mesa and the top of the scarp with a height of ten to tens meters along the piedmont. The terrace T_2 and the mesa are composed of a basal gravel layer and the overlying loess deposits which can be used as da |
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| Keywords: | the Xinding basin later stage of late Pleistocene epoch tectonic movement fault scarps |
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