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| 浅层地震反射和折射层析成像在海州—韩山断裂探测中的联合应用 | |
| 引用本文： | 夏暖,吴子泉,付俊东,张建民,王冬雷,彭刘亚.浅层地震反射和折射层析成像在海州—韩山断裂探测中的联合应用[J].地震,2021,41(4):136-147. |
| 作者姓名： | 夏暖 吴子泉 付俊东 张建民 王冬雷 彭刘亚 |
| 作者单位： | 山东省地震工程研究院,山东济南 250021;山东省地震局,山东济南 250014;安徽省地震局,安徽合肥 230031 |
| 基金项目： | 山东省地震局一般科研项目(YB2007); 连云港市活动断层探测与地震危险性评价项目(JSE-2014-LYG-A01) |
| 摘 要： | 海州—韩山断裂是连云港地区一条重要断裂, 属于海泗断裂带的西边界断裂。 断裂隐伏于较浅的覆盖层之下且控制了基岩岩性分界。 浅层地震反射法作为断层探测的首选方法, 对海州—韩山断裂进行探测时仅能识别出基岩顶面反射波, 难以实现对断裂的准确判别。 而折射层析成像法适用于速度横向差异大的区域, 可获取断层两盘岩性速度差异信息, 进而判定断层位置, 弥补反射法的不足。 本文在跨海州—韩山断裂同一位置上联合应用浅层地震反射和折射层析成像两种探测方法, 进行了钻孔联合剖面探测和合成地震记录验证。 研究表明, 浅层地震反射和折射层析成像两种方法联合探测海州—韩山断裂, 较单一方法可对断层实现更精准的定位, 获取更丰富的断层信息, 为类似地质条件下的断层探测提供了思路。 |
| 关 键 词： | 断层探测 浅层地震反射 折射层析成像 联合应用 |
| 收稿时间： | 2020-04-02 |
| 修稿时间： | 2020-08-24 |
Joint Application of Shallow Seismic Reflection Exploration and Refraction Tomography in the Haizhou-Hanshan Fault Detection |
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| XIA Nuan,WU Zi-quan,FU Jun-dong,ZHANG Jian-min,WANG Dong-lei,PENG Liu-ya.Joint Application of Shallow Seismic Reflection Exploration and Refraction Tomography in the Haizhou-Hanshan Fault Detection[J].Earthquake,2021,41(4):136-147. | |
| Authors: | XIA Nuan WU Zi-quan FU Jun-dong ZHANG Jian-min WANG Dong-lei PENG Liu-ya |
| Institution: | 1. Shandong Institute of Earthquake Engineering, Jinan 250021, China; 2. Shandong Earthquake Agency, Jinan 250014, China; 3. Anhui Earthquake Agency, Hefei 230031, China |
| Abstract: | The Haizhou-Hanshan fault is an important fault in the Lianyungang area and belongs to the west boundary fault of the Haisi fault zone. It is buried under the shallow cover and controle the boundary of base rock. The shallow seismic reflection method is the preferred method for fault detection, however, by using this method, the detection of the Haizhou-Hanshan fault can only identify the reflected wave on the top surface of the bedrock, and it is difficult to accurately determine the fault. The refraction tomography method is suitable for areas with large lateral velocity differences, and can obtain the difference information of lithologic velocity between two fault plates, then determine fault locations, which can compensate for the lacks in refleetion method. In this paper, shallow seismic reflection and refraction tomography are jointly applied at the same location of the Haizhou-Hanshan fault, and the drill exploration composite geological section and synthetic seismograms are verified. The research shows that the joint application of the two methods can achieve more accurate fault location than the single method, and more abundant fault information, which provides ideas for fault detection under similar geological conditions. |
| Keywords: | Fault detection Shallow seismic reflection Refraction tomography Joint application |
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