• 作者： 蔡義本; 余水倍; 廖鴻彬
• 作者服務機構： 中央研究院地球科學研究所籌備處
• 中文摘要： 地熱區有微震活動現象，國外已屢有所聞。經實地觀測結果顯示臺灣東北部大屯火山區及清水、土場地熱區也均有顯著微震活動。本文首先根據這些微震資料推知這兩個地熱區地下有發達的岩層破碎帶，可供作地熱水深循環通道之用。其次，本文又根據最近四年所測定發生於臺灣地區數千次微震資料，進一步指出臺灣東北部正位於菲律賓海板塊隱沒帶上方，地下應蘊藏有極豐富之地熱能量，今後我國地熱探勘與開發，亦宜繼續以本區為主要目標區。
• 英文摘要： Microearthquake activity has been observedin many geothermal areas of the world. Follow-ing detailed observations by local seismographicnetworks, it is found that microearthquake ac-tivity definitely exists in the Tatun volcanicarea and the Chinshui-Tuchang geothermal area,both in northeastern Taiwan. Based on thesemicroearthquake data, fracture zones permittingdeep-circulation of geothermal water are deline-ated. Hypocentral distribution of several thou-sand microearthquakes located in Taiwan areaduring the past few years is used to show thatnortheastern Taiwan is located above the subduc-tion zone of the Philippine Sea plate. Abound-ing heat reserve carried by the rising magmasmakes northeastern Taiwan a highly favorabletarget area for geothermal exploration anddevelopment.
• 中文關鍵字： --
• 英文關鍵字： --