| 邓小波,徐新学,陈永杰,刘桂梅.天津静海-津南剖面地壳上地幔电性结构特征[J].地质与勘探,2007,(1):84-88 |
| 天津静海-津南剖面地壳上地幔电性结构特征 |
| ELECTRIC PROPERTY STRUCTURE OF THE CRUST AND UPPER MANTLE BENEATH JINGHAI- JINNAN PROFILE, TIANJIN |
| 修订日期：2006-05-22 |
| DOI： |
| 中文关键词: 大地电磁 静海-津南地区 电性结构 |
| 英文关键词: magnetotelluric sounding, Jinghai -Jinnan area, electric property structure |
| 基金项目:天津华北地质勘查局科研基金 |
| 邓小波 徐新学 陈永杰 刘桂梅 |
| [1]中石化南方股份有限公司南方勘探开发分公司,昆明650200 [2]天津华北地质勘查局,天津300181 [3]江苏油田地质科学研究院,扬州225009 |
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| 中文摘要: |
| 在天津市区南部的静海-津南一线布置了32个大地电磁测深点,剖面方位角92°,对采集的资料采用远参考与Robust技术进行了处理和解释.对该区的构造维数及构造方向做了分析,揭示了该剖面地壳上地幔电性结构特征,并进行了划分.成果显示:中下地壳存在双层低阻构造层,上地幔表现为中、高阻互层.在断裂带附近受构造活动影响,低阻高导构造层会发生上下错断与缺失.沧东、白塘口、天津断裂均是多组断层构成的断裂带,控制了双窑凸起、白塘口凹陷、板桥凹陷及静海斜坡带次级构造单元. |
| 英文摘要: |
| Tectonic of south Tianjin city is more complexity than other cities.Magnetotelluric(MT) data have been obtained at 32 sites along profile about 57.8 km from Jinghai-Jinnan areas,Tianjin,and got high resolution using the remote reference technique and 2-D inversion method.The results show electric property structure of the crust and upper mantle clearly.The crust has two low resistivity and high-conductive,and the upper mantle has the character of normal or high resistivity together.Fault belts can make high-conductive of the crust and upper mantle up and down.Cangdong,Baitangkou,Tianjin fault belts are made from some faults separately,which control structures of Shuangyao convex,Baitangkou depression and Banqiao depression. |
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