| 摘要 |
A high resolution magnetotelluric method for removing a static frequency domain, comprising steps of: (1) installing multiple sampling devices at the surface of the area to be explored in a form of an array, adjacent observation points sharing a same electrode; (2) performing conventional processing on all observation results whereby obtaining conventional observation curves of the observation points; (3) for the time series data of the original observation value of the electric field along the same direction of all observation points, adding electric-filed components of two adjacent observation points, those of three adjacent observation points, . . . , and those of all points whereby obtaining electric fields of different polar distance, i.e. a sequence of electric field components of topology points and encrypted topology points; (4) using the sequence of the electric field components of the topology points sequence and the encrypted topology points sequence obtained above as an observation field value to perform power spectrum analysis and impedance tensor estimate, whereby obtaining a series of topological observation curves of a same record point; (5) drawing a resistance-variation of polar distance curve of a single frequency point of the record point; observing and analyzing a variation rule of resistivity, editing and deleting static interference resistance, whereby obtaining a resistivity value of the point at the frequency; and (6) repeating the previous step to complete edition of all frequency points of all record points, whereby obtaining observation results without the static frequency domain.
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