Discussion on Method of Eliminating Large Loop Source TEM Border Effect

Zi Qiang Han; Tao Liu

doi:10.4028/www.scientific.net/AMR.962-965.313

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 962-965Discussion on Method of Eliminating Large Loop...

Discussion on Method of Eliminating Large Loop Source TEM Border Effect

Abstract:

Large loop source TEM method has played an important role in minerals and engineering exploration. But there is a strong border effect when one explains by central loop later-time apparent resistivity. In this paper, a method was used to calculate all-time apparent resistivity by magnetic dipoles composing loop. For 1D forward data, all-time apparent resistivity was computed and compared with later-time apparent resistivity. Conclusions have been drawn that all-time apparent resistivity has no border effect on homogeneous ground model; but for complex layered model, all-time apparent resistivity border effect is reflected in vicinity of false extreme point of apparent resistivity curve, and is much weaker than later-time apparent resistivity border effect. The conclusions are conducive to a correct understanding of using all-time apparent resistivity to eliminate border effect and guide correct interpretation of measurement data.

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Periodical:

Advanced Materials Research (Volumes 962-965)

Pages:

313-316

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.962-965.313

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Online since:

June 2014

Authors:

Zi Qiang Han*, Tao Liu

Keywords:

All-Time Apparent Resistivity, Border Effect, Later-Time Apparent Resistivity, Loop, TEM

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