Full field apparent resistivity definition of Borehole TEM with electric source

DOI

10.2991/iceeg-16.2016.42How to use a DOI?

Keywords

grounded electric source,borehole TEM,three-component response, global apparent resistivity, deep exploration

Abstract

Grounded electric source Borehole TEM is introduced in this paper to find the deep conductive ore body, particularly in areas where the ability of surface TEM to define a target is limited either by large depths or by interfering conductive bodies such as overburden shallow sulphides and peripheral mineralized horizons. In this method the grounded electric transmit system is deployed on the surface and receive the three-component TEM response along borehole. As receiver is nearer to ore body through the borehole than on surface, more reliable TEM response of ore bodies can be obtained. Researches show that the detection depth of grounded electric source system is deeper and more suitable for complex terrain area deep prospecting than magnetic source system. Considering there is no conventional explanation method for the grounded electric source borehole TEM, global apparent resistivity is introduced in this paper to provide a reliable explanation method. Global apparent resistivity is defined by the inverse function relationship between induction magnetic field and resistivity of half space. Numerical model calculation results show that underground information can be showed reliably by global apparent resistivity curves along borehole. The application of this study can provide strong support for the deep prospecting in mining area.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Junjie Wu
AU  - Xiu Li
AU  - Qingquan Zhi
AU  - Xiaohong Deng
AU  - Jianlei Guo
PY  - 2016/06
DA  - 2016/06
TI  - Full field apparent resistivity definition of Borehole TEM with electric source
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 152
EP  - 155
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.42
DO  - 10.2991/iceeg-16.2016.42
ID  - Wu2016/06
ER  -