| 台湾西北部海岸阶地的研究 |
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| 引用本文： | 董德辉,邓国雄,刘佳怡.台湾西北部海岸阶地的研究[J].亚热带资源与环境学报,2011,6(4):1-12. |
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| 作者姓名： | 董德辉 邓国雄 刘佳怡 |
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| 作者单位： | 1. 台北市立教育大学历史与地理学系,台北100
2. 中国文化大学地理系,台北105 |
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| 基金项目： | 基金项目:“国科会”地球科学项目 |
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| 摘 要： | 海岸阶地的形成通常是海准面变动、地壳变动或两者共同作用之结果．研究海阶不仅可印证推论古气候、往昔海准面变化及地壳变动状况，更可藉以了解各区域间变动的差异，全盘了解大地构造的意义，而且小规模的海阶变动，时常与地震活动伴生，因此，研究海阶更可作为判读地震周期的依据之一，所以，世界各地位于地壳活动带的国家对于海阶的型态与演育...
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| 关 键 词： | 海阶 海准面变动 地壳变动 地盘隆升率 台湾省 |
The Research of Marine Terraces in Northwestern Taiwan |
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| Abstract: | Influenced by eustatic changes and tectonic movement, marine terraces are considered as indicators of regional tectonic movement, paleo-climate ＆ sea-level variation and crust movement. The study area, from Tamsui river to Ta＇an river, is divided into four groups, and by the use of aerial photographic interpretation, field survey and data analysis, we draw conclusions as following： 1 ） Classified and correlated by continuity of altitude and extension of terrace surface, two type of marineterraces are found in study area, one is Pleistocene terrace type with heights distributed from 15 -275 m and covered with thick laterite, the other belongs to Holocene terrace type whose heights are mostly below 10 m, developed along the coastal lowland and consisted of sand and gravels. 2） Based on dating, elevation, mode of erosion and deposits feature of terraces, the marine terraces uplift rate of Northwestern Taiwan can reflect regional tectonic activities and sea level variation. The uplift rate of marine terraces on the hsinchu coast is 1.4mm/a, and the uplift rates on the north coast of Kuanyin Volcano, on the south coast of Keya river estuary and the south coast of Houlong river estuary are 2. 1 mm/a, 2. 2 mm/a and 2. 15 mm/a, respectively. The uplift rate on the Hsinchu coast is smallest in Northwestern Taiwan, indicating that perhaps the area was influenced by Hsinchu Subsidence Area. |
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| Keywords: | marine terraces eustasy variation crust movement uplift rates Taiwan |
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