On the basis of a discussion on the source of magnetotelluric field,this paper points out that the noises affecting magnetotelluric sounding data can be divided into field source noise,geological noise and human noise,which are derived from different sources.The authors studied the influences of various sorts of noises upon the magnetotelluric sounding data and made frequency spectrum analysis for several sorts of common noise interferences.The geological noise commonly affects the whole frequency domain,and the near field interference mainly affects the limited frequency of high frequency.Nevertheless,the nearby thunder and lightning affect relatively wide frequency band of the high frequency,whereas the unstability of the load system mainly affects the low frequency.Finally,some suggestions are made concerning the elimination or reduction of various noise interferences.
孙洁, 晋光文, 白登海, 梁竟阁, 王立凤. 大地电磁测深资料的噪声干扰[J]. 物探与化探, 2000, 24(2): 119-127.
Sun Jie, Jin Guangwen, Bai Denghai, Liang Jinge, Wang Lifeng . THE NOISE INTERFERENCE OF MAGNETOTELLURIC SOUNDING DATA. Geophysical and Geochemical Exploration, 2000, 24(2): 119-127.
1 Cagniard L.Basic theory of the magnetotelluric method of geophysical prospecting [J].Geophysics,1953,18(3):605～635
2 Smis W E,Bostick F X Jr. Method of magnetotelluric analyses [R].Univ Texas,Elector Geophys Res Lab Tech Rep,1969 58
3 Word D R, Smith H W,Bostick F X Jr. An investigation of the magnetotelluric tensor impedance [R].Univ Texas,Electr Geophys Res Lab Tech Rep,1970, 82
4 Vozoff K. The magnetotelluric method in the exploration of sedimentary basins [J].Geophysics,1972,37(1):98～141
5 Smith J T,Boober J R.Rapid inversion of two and three-dimensional magnetotelluric data [J].Geophys．Res,1991,96(B3):3905～3922
6 Pu X H.Three-dimensional numerical modeling of geo-electromagnetic induction phenomena [D]: [Ph D Thesis].University of Victoria,1994
7 考夫曼,凯勒. 大地电磁测深法 [M]. 刘国栋译. 北京:地震出版社,1987
8 刘国栋,陈乐寿.大地电磁测深研究 [M].北京:地震出版社,1984
9 曾治权.日地关系 [M].北京:地质出版社,1989
10 陈乐寿,王光锷.大地电磁测深法 [M].北京:地质出版社,1990
11 孙景群.大气电学基础 [M].北京:气象出版社,1987
12 Keller G V,Frischknecht.Electrical methods in geophysical prospecting [M].Oxford,Pergamon Press,1966
13 Cantwell T.Detection and analysis of low-frequency magnetotelluric Signals [D]: [Ph D Thesis].M I T:1960
14 Morrison H F,Wombell E,Ward S H.Analyses of earth impedance using magnetotelluric field [J].Geophys Res,1968,73(8):2769～2778
15 陈有发,侯远文,王玉祥.电气化铁路对地震台站影响的某些结果 [J].西北地震学报,1993 15（3）:101～104
16 巴特.地球物理学中的谱分析 [M].郑治真等译.北京:地震出版社,1978
17 郑治真.波谱分析基础 [M].北京:地震出版社,1983
18 罗延钟,何展翔,马瑞伍,等.可控源音频大地电磁法的静态效应校正 [J].物探与化探,1991 15（3）:196～202
19 晋光文,孙洁,王继军.地形对大地电磁测深资料的影响 [J].地震地质,1997 19（4）:363～369
20 晋光文,赵国泽,徐常芳,等.二维倾斜地形对大地电磁资料的影响与地形校正 [J].地震地质,1998 20（4）:454～457
21 赵国泽,汤吉,刘铁胜,等.山西阳高—河北容城剖面大地电磁资料的初步分析—阻抗张量分解技术及其应用 [J].地震地质,1996 18（1）:66～74
22 晋光文,王家映,王天生.一种大地电磁张量阻抗的计算方法 [J].地球物理学报,1982 25（增刊）:650～659
23 江钊,刘国栋,孙洁,等.Robust估计及其在大地电磁资料处理中的初步应用 [A].见:电磁方法研究与勘探 [C].北京:地震出版社,1993 60～69
