陳于高2006-07-252018-06-282006-07-252018-06-282005http://ntur.lib.ntu.edu.tw//handle/246246/11849本計畫配合整合型研究計畫的相互合作，進 行台灣西南部麓山帶與平原地區的活動斷層的精 確調查，目前雖由中央地質調查所發表了四十二條 活動斷層，然而除了對車籠埔斷層外，其他斷層的 構造型態及活動性皆了解有限，本研究希望藉車籠 埔斷層近年來之研究經驗，在台灣西南部找出破壞 性高之地震斷層，並希望在其發生破壞之前，確實 掌握每一條構造斷層之位置與其特性。 首先，對於遼闊的台灣西南地區的構造地 形，以現有的地理資訊系統軟體與數值高程模型資 料(40m DEM)先將其依構造地形豐度分區，再利用 航照圖及高解析衛星影像(Ikonos 或QuickBird)，生 產局部地區高解析度(<5m in grid)之數值高程模型 資料(DEM)，以進一步判讀精確的構造地形及活動 斷層可能發生之位置。第二步，再適當選擇槽溝挖 掘位置，作淺部沈積層序的分析，了解古地震事件 所造成的地層錯動，進而利用碳十四、熱螢光、光 螢光等定年法測定年代，以推估地震斷層之再發生 週期。此外，對現有的河階與台地作更精細的對 比，並採取適當的定年材料進行年代研究，利用其 高程差異與年代資料，來計算活動構造長時間的滑移速率。因此，本計畫規劃利用四年的計劃執行期 間，針對台灣西南部的九條活動斷層與存疑性活動 斷層確實進行上述的工作內容，並進行新定年技術 的發展，以期不但可確實了解更多構造活動特性， 亦能提升定年技術的效率與精度。This project will collaborate with the other principal investigators to work on the neotectonics of southwestern Taiwan. There are 42 active faults have been identified by Central Geological Survey, ROC. Except for the Chelungpu fault, the 1999 earthquake fault, we only have insufficient information on the others. Based on the Chi-Chi experience, this project aims to find out the potential earthquake faults located in the proposed area. Hopefully, we can understand more and prepare well before next disaster coming. The methods of Geomorphology, Trenching, and Geochronology will be adopted in this project. First of all, the GIS software and 40m DEM of Taiwan will be used to roughly divide the neotectonic domains by the abundance of tectonic features. The high priority domain will further be studied by high resolution DEM (<5m), produced by aerial photos and high-resolution satellite imagery (Inokos or QuickBird). The result will provide precise tectonic features that can be linked to active faults. Following the above results, we therefore can make better decision to find the trenching sites along the high potential seismogenic faults. Paleoseismology study (trenching) will be then conducted to retrieve the relevant information with respect to the paleo-events. For the purpose of computing the recurrence interval, dating methods of radiocarbon, optical stimulated luminescence (OSL), and thermoluminescence (TL) are used to build up the time frame. The dating methods can also be applied to the river terraces and tablelands in the surrounding area to derive the long-term slip rates of the active structures, which is of great importance in evaluating the current situation of the active faults. This project plans four years to accomplish the goals: 1) evaluation of characteristics and recurrence intervals on all reported active faults; 2) improve the dating techniques.application/pdf77353 bytesapplication/pdfzh-TW國立臺灣大學地質科學系暨研究所新期地體構造運動地理資訊系統數值 高程模型槽溝碳十四定年光螢光定 年熱螢光定年neotectonic activitygeographic information system (GIS)digital elevation model (DEM)trench, 14 C datingoptically stimulated luminescence dating (OSL)thermoluminescence dating (TL)reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/11849/1/922116M002023.pdf