@article{2fd8496b8369463f8be4265bdafadae0,
title = "Potential geothermal structure inferred from the electrical resistivity and seismic reflection models in the western Ilan Plain, NE Taiwan",
abstract = "The Ilan Plain is identified as the western extension of the Okinawa Trough in the northeastern Taiwan subduction system and is considered one of the most active geothermal areas in Taiwan. An east-west extending magma-like body caused by the westward of the Okinawa Trough had been revealed from seismic and geomagnetic studies. Two geological models have been suggested as an extensional strike-slip fault and normal fault models for the deep geothermal field in NE Taiwan. The difference of the main fault in the two geology models is the active normal strike-slip fault or inactive thrust fault and its dip directions. We investigated the electrical resistivity structure beneath the Ilan Plain using audio-magnetotelluric data to delineate the location of its geothermal reservoirs. The 3D electrical resistivity model is highly correlated with the normal fault model. The electrical resistivity model shows that the high conductivity anomaly distributes in the depths of 500-1,100 m south of the drilled geothermal observation wells. We correlate the anomalous high conductor with the reservoir and it could be controlled by the Chuoshui Fault and the Chukeng Fault. The meteoric water may propagate down through the high-permeability fault system that creates the geothermal system.",
keywords = "Electrical resistivity, Fluids, Geothermal energy, High conductivity anomaly, High-permeability fault system, Reservoir",
author = "Chiang, {Chih Wen} and Yang, {Zhi Xian} and Chen, {Chien Chih} and Yeh, {En Chao} and Chen, {Chow Son} and Wang, {Chien Ying}",
note = "Funding Information: The authors acknowledge the financial support from the Ministry of Science and Technology of Taiwan under grant numbers 105-2116-M-019-001 , 106-2116-M-001-008 , 106-2116-M-019-003 , 107-2116-M-019-006 , and 108-2116-M-019-006 . We also thank the projects of geothermal energy and gas hydrate of NEPII under grant numbers 106-3113-M-008-002 and 107-3113-M-008-004 for supporting the funds. We would like to thank Drs. A. Kelbert and G. Egbert for providing the ModEM code. Dr. H. Dong would also be thanked for providing a useful GUI tool for the ModEM. We also wish to thank Dr. C.W. Lin for his constructive discussion in the geological interpretations. The MT instruments are partly supported by the Industrial Technology Research Institute, ITRI. We truly thank the Editors-in-Chief, C. Bromley and three anonymous reviewers for their constructive criticism and valuable comments. Publisher Copyright: {\textcopyright} 2021",
year = "2021",
month = jul,
doi = "10.1016/j.geothermics.2021.102124",
language = "English",
volume = "94",
journal = "Geothermics",
issn = "0375-6505",
publisher = "Elsevier Limited",
}