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相關文獻
- 陽明山國家公園之火山地震活動
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- 大屯火山群火山活動性監測
- Distribution and Significance of Volcanic Materials in Sediments of the Taipei Basin
- Characteristics of the Tatun Volcanic Eruptions, North Taiwan: Implications for a Cauldron Formation and Volcanic Evolution
- 從火山地形探討大屯火山群的地層層序與構造
- Eruptions Younger Than 20 Ka of the Tatun Volcano Group as Viewed from the Sediments of the Sungshan Formation in Taipei Basin
頁籤選單縮合
題名 | 陽明山國家公園之火山地震活動=Volcano-Seismic Signals in the Tatun Volcanic Area |
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作者 | 林正洪; 柯士達; 蒲新杰; | 書刊名 | 國家公園學報 |
卷期 | 17:1 2007.06[民96.06] |
頁次 | 頁87-97 |
分類號 | 354.4 |
關鍵詞 | 大屯火山群; 岩漿庫; 微震活動; 群震; 火山地震訊號; Tatun volcano group; Seismic monitoring; Magma chamber; Seismicity; Swarm; Volcanic tremor; |
語文 | 中文(Chinese) |
中文摘要 | 雖然陽明山國家公園內大屯火山群已經沉寂長久,但是地表地熱及微震活動還是很明顯。根據噴氣所含氦同位素之最近分析研究,顯示部分噴氣來自岩漿源,這強烈的暗示台灣北部地底下依舊存在有岩漿庫之可能性。故大屯火山群是否再度活動的可能性,不僅是一個值得研究的科學問題,更關係大台北附近民眾的生命財產安全。經由過去兩年多仔細地分析八個地震站之地震記錄,除了於七星山及大油坑附近之最上部地殼中,觀測到許多微震與群震之活動外,也發現有異常的火山地震訊號,例如地震波形類似螺絲釘(Tornillos)與單頻水滴狀地震紀錄,及連續性爆發型之火山地震活動。初步定位顯示這些來源亦落於七星山及大油坑附近地區之淺部地殼。這些訊號之發生機制,一般可以用岩層裂縫內液體或氣體,因壓力突增或突減造成之震動來解釋。雖然依目前之地震資料,無法清楚地判識這些群震現象與異常訊號之正確機制,但其特徵卻與一般火山地區之岩漿或熱水活動相似,故很值得作更進一步之探討與研究。 |
英文摘要 | In the Tatun volcanic area, the geothermal and seismic activities are still very strong even there was no volcanic eruption for a long time. The possibility of re-eruption in the Tatun volcanic group is not only a scientifically interesting topic but also an important issue related to the safety in the whole Taipei area. In this study, micro-earthquakes in the Tatun volcanic area were detected by using a small-aperture seismic network consisting of eight seismic stations in the past two years. In addition to micro-earthquakes and swarms located beneath the Chihsingshan and Tayiokeng areas, some continuous volcanic tremors such as Tornillos, harmonic signals and spasmodic bursts were recorded at different stations. Most of those volcanic tremors are also located beneath the Chihsingshan and Tayiokeng areas. Those tremors might be associated with the cracking process in the volcanic area. Although the exact mechanisms of generating those continuous tremors and swarm can not be identified from seismic data recorded so far, those features were very similar to the signatures produced by either the magma chamber or other geothermal activities at the active volcanic areas in the world. Therefore, further investigations will be done to improve the understanding of the mechanisms that generate the swarm and tremors in the Tatun volcanic area. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。