A method of correcting the long period magnetotelluric sounding curve

作者：Jian Xingxiang^*; Zhu Sixin; Qin Qingyan

来源：Journal of Convergence Information Technology, 2012, 7(11): 179-185.

DOI：10.4156/jcit.vol7.issue11.22

• Apparent resistivity
• De-noising
• Field data
• Magnetotelluric soundings
• Phase information
• Random noise
• Songpan -hechuan
• Theoretical calculations

During the collection of field data of the long period magnetotelluric sounding, apparent resistivity curve will be interrupted by noise, especially within the frequencies of "dead frequency band", the distortion of the curve is serious, even the trend of the apparent resistivity curve cannot be determined. Based on the feature that impedance phase is hardly affected by random noise, this paper tried to "correct" the apparent resistivity distortion curve through impedance phase and applied the theory to data processing of Songpan-Hechuan LMT profile. Theoretical calculations and practical application show that the distorted apparent resistivity curve can be recovered segment by segment using impedance phase information influenced little by noise, having better practical value.

• 出版日期2012
• 单位成都理工大学