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| 用大地电磁网法在长春等地探测上地幔电导率结构 | |
| 引用本文： | 赵国泽,汤吉,梁竞阁,H.Utada,M.Uyeshina,M.Ichiki,马明志,黄之维,王洪歧.用大地电磁网法在长春等地探测上地幔电导率结构[J].地震地质,2001,23(2):143-152. |
| 作者姓名： | 赵国泽 汤吉 梁竞阁 H.Utada M.Uyeshina M.Ichiki 马明志 黄之维 王洪歧 |
| 作者单位： | 1. 中国地震局地质研究所, 2. 日本东京大学地震研究所 3. 吉林省地震局, |
| 基金项目： | 中国地震局地质研究所项目，2001B0013， |
| 摘 要： | 使用长周期大地电磁测深网 (Network -MT)等技术 ,在长春和三岔河等地对太平洋板块弧后的上地幔电导率结构进行了探测。用陆地电话线或电缆接收长基线的电场 ,由设置在长春地磁台的三分量磁通门磁力仪记录磁场变化 ,得到Network -MT等观测资料的最长周期可达 10 5～10 6 s,反演结果的深度可达约 10 0 0km。 1)在两个区的 10 0～ 2 0 0 ,30 0 ,50 0～ 6 0 0km深度附近存在电性间断面 ;2 )长春测区的 850km深度存在电性间断面 ;3)平滑模型的电导率随深度增大而单调增加 ;4 )三岔河测区 6 0 0km深度、长春测区 850km深度的电导率达到 1S/m。上述结果表明 ,地幔内存在不连续界面和不均匀性 ,有些结果可与岩石学的研究结果对比 |
| 关 键 词： | 大地电磁网 上地幔 电导率 |
MEASUEMENT OF NETWORK-MT IN TWO AREAS OF NE CHINA FOR STUDY OF UPPER MANTLE CONDUCTIVITY STRUCTURE OF THE BACK-ARC REGION |
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| Zhao Guoze,Tang Ji.MEASUEMENT OF NETWORK-MT IN TWO AREAS OF NE CHINA FOR STUDY OF UPPER MANTLE CONDUCTIVITY STRUCTURE OF THE BACK-ARC REGION[J].Seismology and Geology,2001,23(2):143-152. | |
| Authors: | Zhao Guoze Tang Ji |
| Abstract: | The upper mantle electrical conductivity structure of the Pacific back-arc beneath northeastern China was investigated by the long-period magnetotelluric (Network-MT) at Changchun city and Sanchahe site. Time series data of the long baseline electric field were collected by using land telephone line cables and three component magneic field variations were recorded at Changchun observatory by digital flux magnetometer. Network-MT responeses have been obtained up to 10 5～10 6s, which were inverted to one-di |
| Keywords: | Network-MT Upper Mantle Conductivity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |