| 天水地区大地电磁测量及深部电性结构 |
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| 引用本文： | 刘宝勤,朱佐全,贾政,郭万武,李柱国,张文仁,屈健鹏.天水地区大地电磁测量及深部电性结构[J].西北地震学报,1995,17(4):70-78. |
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| 作者姓名： | 刘宝勤 朱佐全 贾政 郭万武 李柱国 张文仁 屈健鹏 |
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| 作者单位： | 国家地震局兰州地震研究所 |
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| 摘 要： | 天水地区的大地电磁测量结果表明，在４３ｋｍ左右的深度上普遍存在高导层，这可能是壳幔过渡带的反映。岩石圈厚度大约９５－１１０ｋｍ。在天水太京附近可能存在一条大型近东西向地壳－岩石圈构造带，在秦安以北的叶堡和陇城附近可能也存在一条近南北向的大型地壳－岩石圈构造带，它们都是不同构造单元的分界线。１６５４年天水８级大震可能与深部热异常引起的热应力有关。
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| 关 键 词： | 大地电磁测深 地下电性结构 地壳 岩石圈 |
| 收稿时间： | 1995/3/21 0:00:00 |
MT SURVEY AND DEEP ELECTRIC STRUCTURE IN TIANSHUI AREA |
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| Liu Baoqin,Zhu Zuoquan,Jia Zheng,Cuo Wanwu,Li Zhuguo,Zhang Wenren and Qu Jianpeng.MT SURVEY AND DEEP ELECTRIC STRUCTURE IN TIANSHUI AREA[J].Northwestern Seismological Journal,1995,17(4):70-78. |
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| Authors: | Liu Baoqin Zhu Zuoquan Jia Zheng Cuo Wanwu Li Zhuguo Zhang Wenren and Qu Jianpeng |
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| Institution: | Earthquake Research Institute of Lanzhou, SSB, China,Earthquake Research Institute of Lanzhou, SSB, China,Earthquake Research Institute of Lanzhou, SSB, China,Earthquake Research Institute of Lanzhou, SSB, China,Earthquake Research Institute of Lanzhou, SSB, China,Earthquake Research Institute of Lanzhou, SSB, China and Earthquake Research Institute of Lanzhou, SSB, China |
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| Abstract: | The MT survey in Tianshui area shows that there is a high conductivity layer in the depthof 43 km,which may be the reflection of the crust-mantle transition zone. The lithosphericthickness is about 95-110 km. There might be a large crust-lithosphere tectonic zone nearlyin EW direction around Taijing, Tianshui, and there might be also a large crust-lithospheretectonic zone nearly in NS direction mear Yebu and Longcheng,Qin an,The two zones areall the boundary lines of different tectonic units.The Tianshui M 8.0 earthquake in 1654probably related to the thermal stress caused by the deep heat anomaly. |
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| Keywords: | Telluric electromagnetic sounding Underground electrical structure Crust Lithosphere Tianshui |
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