摘要： The Ilan Plain is located at the southwestern tip of the back arc basin of the Okinawa Trough, which propagates westward into the Taiwan orogen. A long discussed issue concerns whether the opening normal-fault system of the Okinawa Trough propagates and transforms into the thrust-fault system of the Taiwan orogen. We have reprocessed and inverted resistivity measurements from a series of surveys conducted in the 1970s around the Chingshui-Sanshing-Hanchi area of southwestern Ilan County. The 2D and 3D inverted resistivity images reveal the regional structures. A major conductive structure dipping toward the northwest at an angle of 30° - 40° is located at the expected site of the Niudou Fault separating the Early Miocene Szeleng and Kangkou Formations from the Lushan Formation in the Sanshing area, which dip direction of two conductive structures with a dipping angle of 50° - 70° were coinciding with the dip direction of normal faults identified from the field surveys. In addition three high-angle discontinuity structures, dipping toward the north with an angle of 60° - 80° can be identified in the resistivity profile along Hanchi. We tend to suggest these structures as the extended portions of the normal faults that have been identified under the unconsolidated sediments in the Ilan Plain. Resistivity profiles from the Chingshuichi area reveal the existence of the vertical Chingshuichi, the Dachi, and the Xiaonanauo Fault. Hot springs were found in the junction area of the Chingshuichi and the Xiaonanauo Fault. The junction region of these two fault systems is the potential Chingshui geothermal field that provides fluid geothermals from the deep. 出版者： Taiwan: 中華民國地球科學學會 出版日期： 2014-08-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2014-08, Vol.25 (4), p.491-504 資源來源： 華藝線上圖書館中文電子期刊 (Chinese Electronic Periodical Services (CEPS))(Journals學術期刊資料庫) 版權： 2014. 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.2014.01.24.01(TT)
