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| The elimination of the whole airspace effect: Principle, apparatus and application example |
| BU Chuan-Xin, XIAO Xin-Xing, Wang Hong, WU Di |
| No. 247 Geological Party, Hunan Bureau of Geological Exploration for Nonferrous Resources, Changsha 410129, China |
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Abstract The elimination of 'whole airspace effect' is a difficult problem in electromagnetic exploration. Experts both in China and abroad have tried to solve this problem from such aspects as basic principle, data-processing and traverse employment; nevertheless, there exist problems like harsh condition for seeking solution, complicated calculation, difficulty in realizing technical aim and high cost. This paper puts forward a new train of thought in which shielding apparatus is employed to directly eliminate the whole airspace effect so as to approach ground-style survey. The corresponding device is developed, and the application method and examples are given. Practice shows that the result is satisfactory.
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Received: 28 October 2016
Published: 20 August 2017
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