Research on inversion resolution for ERT data and applications for mineral exploration

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Title:	Research on inversion resolution for ERT data and applications for mineral exploration
Authors:	陳建志;Zhang, Gang;Zhang, Gui-Bin;Chen, Chien-Chih;Jia, Zheng-Yuan
Contributors:	地球科學學院地球科學學系
Keywords:	atmospheric science;Computer simulation;Drilling;Electrical resistivity;Electrodes;Finite element method;geology;geophysics;hydrology;Imagery;Mathematical analysis;Mathematical models;Mineral exploration;Numerical simulations;oceanic science;Parallel processing;Relaxation method (mathematics);Resolution;space science;Surveys;Tomography
Date:	2015-01-01
Issue Date:	2026-04-23 11:42:35 (UTC+8)
Publisher:	Chinese Geoscience Union;Taiwan: 中華民國地球科學學會
Abstract:	摘要： This paper presents the effects of two factors on electrical resistivity tomography (ERT) resolution using numerical simulations. The results obtained from the first group of synthetic resistivity model numerical simulations with different electrode configurations illustrate that the inversion resolution can be improved if the current electrodes and potential electrodes are installed at a subsurface depth. The results obtained from the second group of synthetic resistivity models with different mesh densities illustrate that the inversion resolution can be improved if the mesh grid density is increased. The increased number of degrees of freedom necessary to fit the data to a prescribed target misfit leads to the inverted imagery deviating from the true resistivity model. Throughout the literature the inversion procedure is implemented in the conjugate gradient relaxation method and the model calculation speed is enhanced using the parallel processing mode. ERT surveys were employed for mineral exploration at Chifeng in Inner Mongolia, China. The inverted image clearly describes the vein behavior down to 200 m in depth in the prospect area and is consistent with the drilling data results. 出版者： Taiwan: 中華民國地球科學學會出版日期： 2015-10-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2015-10, Vol.26 (5), p.515-526 資源來源：華藝CEPS中文電子期刊服務版權： 2015. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1017-0839 識別號： ISSN: 2223-8964 識別號： ISSN: 2311-7680 識別號： EISSN: 2311-7680 識別號： DOI: 10.3319/TAO.2015.05.06.01(T)
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