Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 27    No. 8    August 2017

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Dynamic imaging of metallic contamination plume based on self-potential data
Yi-an CUI1,2,3, Xiao-xiong ZHU1,2,3, Wen-sheng WEI1,2,3, Jian-xin LIU1,2,3, Tie-gang TONG1,2,3

1. School of Geosciences and Info Physics, Central South University, Changsha 410083, China; 2. Hunan Key Laboratory of Non ferrous Resources and Geological Hazard Detection, Central South University, Changsha 410083, China; 3. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083, China

Abstract:A dynamic imaging method for monitoring self-potential data was proposed. Based on the Darcy’s law and Archie’s formulas, a dynamic model was built as a state model to simulate the transportation of metallic ions in porous medium, and the Nernst equation was used to calculate the redox potential of metallic ions for observation modeling. Then, the state model and observation model form an extended Kalman filter cycle to perform dynamic imaging. The noise added synthetic data imaging test shows that the extended Kalman filter can effectively fuse the model evolution and observed self-potential data. The further sandbox monitoring experiment also demonstrates that the self-potential can be used to monitor the activities of metallic ions and exactly retrieve the dynamic process of metallic contamination.


Key words: dynamic imaging; self-potential; metallic contamination; extended Kalman filter

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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