楊燦堯2006-07-252018-06-282006-07-252018-06-282002http://ntur.lib.ntu.edu.tw//handle/246246/11788本年度為第二年計畫，著重於大屯火 山區之噴氣來源探討。由氣體樣品中之 氦、碳、氮同位素比值估算，本地區氣體 樣品中皆含有顯著的地函源氣體比例，其 中以大油坑噴氣中有高達90 ％氦氣成份源 於岩漿端成份，暗示大屯火山群底下可能 仍存在有岩漿庫持續逸氣中。持續氦同位 素比值監測結果，並未發現有明顯異常之 變化，顯示本地區之供氣系統相對穩定。It is a three-year monitoring project on potential magma activity by geochemical method in northern Taiwan. We have focused on the gas sources of the Tatun Volcano Group in the first year. Helium, carbon and nitrogen isotopic ratios results show that large amount of mantle derived components are involved in the gas samples in this area. The highest helium isotopic ratio is obtained from Da-Yiou-Keng. Up to 90% of magmatic component was estimated for its gas sources. It implies that there may be magma reservoir underneath Tatun Volcano area. However, no significant anomalous variations of helium isotopic ratios of the gas samples have been observed during last two years. It suggests that the de-gassing system in this area is relatively steady in the period.application/pdf37270 bytesapplication/pdfzh-TW國立臺灣大學地質科學系暨研究所大屯火山群龜山島火山噴氣溫泉監測Tatun VolcanoesKueishantaofumaroleshot springssurveillancereporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/11788/1/902116M002009.pdf