2011-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/681494摘要：本計畫為研究大屯火山群和觀音山的火山地質與大屯火山群和龜山島火山活動史，並監測其活動性，以推斷大屯火山群和龜山島火山未來再噴發的可能性與可能的火山災害。計畫分四年進行，分別對(1)大屯山外圍淡水地區、萬里地區及楠子山地區；(2)竹子山火山群地區；(3)大屯火山群外圍三芝、金山地區；(4)觀音山火山群地區等，詳細的研究各地區的火山地質、噴發史及其活動性。本年度為第四年的計畫，以觀音山火山群為研究地區。本年度計畫工作主要包括火山地質調查和火山流體成分監測兩大部分，採用的方法有野外地質調查和採樣，以及室內實驗室分析工作。火山地質野外工作包括調查火山噴發產物的分布和層序，以繪製火山地質圖及評估火山災害的可能影響範圍，並採集適當的岩石樣本，攜回實驗室分析岩石之組織與礦物組成及岩石化學等，初步建立火山熔岩流之層序，並準備氬－氬法測定各熔岩流之絕對年代、以及鍶和釹同位素的樣本，分析後以建立研究地區之火山活動史、活動頻率和岩漿演化。監測火山活動性的野外工作，主要是延續過去在大屯火山群的火山氣體和溫泉固定時間採集樣本，進行實驗室分析，建立各火山氣體和溫泉的背景值，和流體隨時間的變化，並設立流體監測站；以及現有火山流體和地熱監測站的持續監測。<br> Abstract: This project is proposed to evaluate the potential of the volcanic eruption and hazards in the Tatun Volcano Group and Kueishantau volcano for the future. The evaluation will mainly be based on results of the studies of recent activity and the history of eruptions of the volcanoes. It will be carried out for four years including (1) Tanshui, Wanli and Nantzushan areas; (2) Chutzushan area; (3) Sanchih and Chinshan areas; and (4) Kunyinshan area. The working area in the fourth year will focus on the Kunyinshan volcanoes.The works in this project focus on volcanic geology and monitoring the Tatun Volcano Group and Kueishantau volcano. Methods used in this project include field survey, sampling and laboratory analyses. The volcanic geology, i.e. volcanic rock distributions, sequences, history and hazards, will be analyzed by the detailed field survey, mapping and sampling as well as laboratory studies which include petrographic observations, geochemical and dating analyses of the volcanic rocks. In the meanwhile, the potential activity of the volcanoes will be monitored by the fluid geochemistry and heat flow.大屯火山群龜山島火山地質流體地球化學火山監測