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| 安丘—莒县断裂小店—大店段断层活动证据及断层泥分布特征初步研究 | |
| 引用本文： | 付俊东,王志才,熊仁伟,王雷,张广成,夏暖.安丘—莒县断裂小店—大店段断层活动证据及断层泥分布特征初步研究[J].地震,2017,37(2):57-66. |
| 作者姓名： | 付俊东 王志才 熊仁伟 王雷 张广成 夏暖 |
| 作者单位： | 1.山东省地震局, 山东 济南 250014; 2.中国地震局地震预测研究所, 北京 100036 |
| 基金项目： | 山东省地震局科研基金项目(JJ1507Y)和山东省自然科学基金(ZR2012DM005) |
| 摘 要： | 郯庐断裂带最新活动的断层分布于潍坊至嘉山一带, 而安丘—莒县断裂是郯庐断裂带的重要活动断裂之一。 基于地质考察、 高密度电法探测和钻孔联合剖面, 对安丘—莒县断裂小店—大店段断层活动证据及断层泥分布特征进行研究。 地质考察发现紫红色砂砾岩逆冲到全新世耕植土上方, 两者之间发育断层泥带, 断层泥内含少量角砾岩, 为全新世活动逆断层。 高密度电法探测结果表明断层通过位置电阻率差异明显。 钻孔联合剖面揭露的地层: 全新世耕植土、 全风化砂质泥岩、 强风化砂质泥岩、 碎裂岩、 断层泥带及中风化砂质泥岩。 钻孔K1和K2揭露深灰色断层泥带, 倾向西, 倾角约为74°, 厚度约为13.9 m, 与南侧出露的断层泥带产状相协调。 工作区范围内, 发育多处褶皱、 破碎带和断层泥带, 断层表现为全新世逆断层性质。 |
| 关 键 词： | 郯庐断裂带 断层泥 高密度电法 钻孔联合剖面 |
| 收稿时间： | 2016-10-10 |
Evidences of Fault Activity and Gouge Distribution of the Dadian—Xiaodian Segment in the Anqiu—Juxian Fault |
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| FU Jun-dong,WANG Zhi-cai,XIONG Ren-wei,WANG Lei,XIA Nuan.Evidences of Fault Activity and Gouge Distribution of the Dadian—Xiaodian Segment in the Anqiu—Juxian Fault[J].Earthquake,2017,37(2):57-66. | |
| Authors: | FU Jun-dong WANG Zhi-cai XIONG Ren-wei WANG Lei XIA Nuan |
| Institution: | 1. Earthquake Administration of Shandong Province, Jinan 250014, China; 2. Institute of Earthquake Science, CEA, Beijing, 100036, China |
| Abstract: | The latest active fault in the Tancheng—Lushan fault zone is distributed from Weifang to Jiashan, and the Anqiu—Juxian fault is one of the important active faults.Based on geological investigation, high density resistivity method and composite drilling section, we studies evidences of fault activity and distribution characteristics of fault gouge of the Dadian—Xiaodian segment of the Anqiu—Juxian fault. Field geological investigation finds that prune glutenite thrusted to the top of the holocene cultivated soil, and Gouge zone with some breccia existed between the two stratum, which was characterized by holocene activity. The high density resistivity method results show that difference of positional resistivity of faults is obvious. Stratum revealed by the composite drilling sections mainly contains the following: holocene cultivated soil, completely decomposed sandy mudstone, and Strong-weathered sandy mudstone, cataclastic rocks, fault gouge, as well as, medium weathered sandy mudstone. Dark grey gouge zone revealed by the holes of K1 and K2 inclinesto west with a dip angle of 74°and thickness of 13.9 m, which is consistent with the southern gouge zones in fault occurrence. In the working area, there are multiple folds, fracture zones and gouge zones and the fault is a holocene reverse fault. |
| Keywords: | The Tancheng—Lushan fault Gouge High density resistivity Composite drilling |
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