| 郑州老鸦陈断裂的探测与活动性调查研究 |
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| 引用本文： | 郝凯,田勤俭,刘保金,尹功名.郑州老鸦陈断裂的探测与活动性调查研究[J].地震学报,2008,30(4):416-423. |
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| 作者姓名： | 郝凯 田勤俭 刘保金 尹功名 |
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| 作者单位： | 1) 中国北京100036中国地震局地震预测研究所2) 中国郑州450002中国地震局地球物理勘探中心3) 中国北京100029中国地震局地质研究所 |
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| 摘 要： | 通过浅层地震勘探、钻孔联合剖面分析、野外地貌调查以及新地质年代测定等技术方法，对原先认定的郑州老鸦陈断裂的活动性开展调查. 其中，浅层地震勘探结果表明，该断裂仅存在于新近纪以前的地层，而在新近纪地层内均未发现该断层错断和活动迹象. 同时，地表的地质地貌调查亦发现ldquo;地貌陡坎rdquo;与老鸦陈断裂的位置不一致. 另外钻探和钻孔联合剖面的分析也表明，地表的陡坎仅发育在马兰黄土中， 其下地层平缓，没有错断现象，认为该陡坎的形成与老鸦陈断层没有关系，但可能与黄河改道变迁的侵蚀作用有关. 因此，老鸦陈断裂不属于活动断裂.
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| 关 键 词： | 老鸦陈断裂& & 断层活动性& & 浅层地震勘探& 钻探 & 地貌调查 |
Exploration of the Laoyachen fault,Zhengzhou of China,and its activity investigation |
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| Hao Kai,Tian Qinjian,Liu Baojin,Yin Gongming.Exploration of the Laoyachen fault,Zhengzhou of China,and its activity investigation[J].Acta Seismologica Sinica,2008,30(4):416-423. |
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| Authors: | Hao Kai Tian Qinjian Liu Baojin Yin Gongming |
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| Abstract: | Activity of the Laoyachen fault, which was previously recognized as an active fault, is investigated by means of shallow seismic exploration, borehole composite profile analysis, geomorphologic survey and geological dating. The seismic exploration result indicates that this fault only appears in the strata before Neogene, while it has not cut through the Neogene strata themselves. The surface geological and geomorphologic survey show that the position of so-called "fault scarp" is not consistent with the outcrop of the Laoyachen fault. Moreover, the result of drilling and borehole composite profile analysis denotes that the scarp only grew in the Malan Loess, and the strata below kept gentle without offsetting. We think that the formation of this scarp may be associated with the course change of the Yellow River, rather than being related to the motion of the Laoyachen fault. Therefore, the Laoyachen fault is not an active fault. |
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| Keywords: | Laoyachen fault fault activity shallow seismic exploration drilling geomorphologic survey |
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