台北堰塞湖考证-NationalTaiwanUniversity.PDF

77 地理學報 第三十六期： 77-100 (2004) JOURNAL OF GEOGRAPHICAL SCIENCE (36) : 77-100 (2004) 臺北堰塞湖考證 On the Taipei Dammed Lake 鄧屬予 * 李錫堤** 劉平妹*** 宋聖榮**** Louis S. Teng Chyi-Tyi Lee Ping-Mei Liew Sheng-Rong Song 曹恕中 ***** 劉桓吉****** 彭志雄******* Shuh-Jong Tsao Huan-Chi Liu Chih-Hsiung Peng Abstract To test the hypothesis that the Taipei Basin was a lake dammed from a coastal bay by the volcanic rocks at Kuandu, we examined the boreholes of the Taipei Basin and found in the shallow subsurface a widespread estuarine deposit indicative of the alleged coastal bay. This deposit, however, extends into the Tanshui estuary west of * 國立臺灣大學地質科學研究所教授，通訊作者 (e-mail: tengls@ntu.edu.tw) Professor, Institute of Geosciences, National Taiwan University, Corresponding Author. ** 國立中央大學應用地質研究所副教授 Associate Professor, Institute of Applied Geology, National Central University. *** 國立臺灣大學地質科學研究所教授 Professor, Institute of Geosciences, National Taiwan University. **** 國立臺灣大學地質科學研究所副教授 Associate Professor, Institute of Geosciences, National Taiwan University. ***** 經濟部中央地質調查所科長 Geologist, Central Geological Survey, Ministry of Economic Affairs. ****** 經濟部中央地質調查所技正 Geologist, Central Geological Survey, Ministry of Economic Affairs. ******* 國立臺灣大學地質科學研究所博士生 Graduate student, Institute of Geosciences, National Taiwan University. 78 Kuandu and is neither overlain by any lacustrine deposit nor by volcanics. Instead, it overlies the volcanic rocks at Kuandu, indicating that the Tanshui river channel postdates the volcanic