跳到主要內容

臺灣博碩士論文加值系統

(35.172.111.71) 您好!臺灣時間:2022/05/23 09:43
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:黃安婕
研究生(外文):An-Chieh Huang
論文名稱:由海底地震儀資料探討南沖繩海槽熱液活動
論文名稱(外文):Exploring hydrothermal activity in the South Okinawa Trough using ocean bottom seismometer data
指導教授:林靜怡林靜怡引用關係柯士達柯士達引用關係
指導教授(外文):Jing-Yi LinKonstantinos I Konstantinou
學位類別:碩士
校院名稱:國立中央大學
系所名稱:地球科學學系
學門:自然科學學門
學類:地球科學學類
論文種類:學術論文
論文出版年:2021
畢業學年度:109
語文別:中文
論文頁數:82
中文關鍵詞:海底地震儀南沖繩海槽熱液活動諧波震顫
外文關鍵詞:Ocean bottom seismometerSouth Okinawa TroughHydrothermal activityHarmonic tremor
相關次數:
  • 被引用被引用:0
  • 點閱點閱:31
  • 評分評分:
  • 下載下載:7
  • 收藏至我的研究室書目清單書目收藏:0
沖繩海槽是琉球弧溝系統作用所造成的弧後擴張盆地,在這樣張裂性的地質作用區域內常有活躍的火成和熱液活動。在過去的研究中,利用地球物理(震測、重力和磁力)、地質(岩石採樣)和實際水下觀測方法,在南沖繩海槽內發現許多有潛力的熱液活動場址,包含火龍火山1、火龍火山2、石林隆堆、蓬萊斷層帶及第四與那國海丘場址等,但這些方法對於熱液相關活動分析所能涵蓋區域通常較小或是無法長期持續觀測。而海底地震儀具備一個水聽器及三分量的地動儀,可以用來持續監測天然地震及各種地動訊號,本研究即希望利用海底地震儀資料分析,來對於這些熱液活動資訊有更進一步了解。
本研究分析了在2017年4月7日至4月18間OR2-2231航次於南沖繩海槽佈放的6個海底地震儀資料,利用時頻分析、模型模擬、訊號來源分析及衰減因子分析等理論方法進行資料處理。地震儀震波時頻分析結果顯示,其中3個海底地震儀有記錄到諧波震顫(harmonic tremor),一種常被認為與流體在火山內部的共振或火山氣體的排放有關的訊號。在測站距離小於7公里的情況下,諧波震顫只被單一個海底地震儀記錄,推測諧波震顫應該是由局部的活動造成。從時頻圖上觀察到不同測站的資料時頻特性相近,訊號能量基頻約都在4Hz左右。為了瞭解諧波震顫的震源特性,本研究透過火山震顫模擬測試不同物理參數下產生的不同火山震顫,結果顯示諧波震顫在氣體週期性供應時才會產生,且諧波震顫能量峰值的變化可能代表熱液活動情形的改變。將本研究訊號來源定位分析結果搭配前人研究南沖繩海槽內部的噴氣構造位置後,發現諧波震顫訊號來源與透過地球物理方法所獲得之噴氣較密集的區域及海底火山的位置對應良好。此外,本研究還觀察到訊號來源方向隨著時間的變化,推測可能是來自不同方向訊號活動程度差異或是流體在熱液系統內遷移導致的結果。依照能量頻率分布所計算出的衰減因子Q值基本上落在20以下,代表在研究時間內此區域熱液流體的組成非常穩定。
Okinawa Trough is the back-arc basin formed behind the Ryukyu arc-trench system. In such extensional environments, magmatism and hydrothermal activities are very common. Many gas plumes and submarine volcanoes have been detected in the South Okinawa Trough (SOT), and several potential hydrothermal sites are mapped based on the various geophysical and geochemical survey data, which include Fire Dragon Volcano 1 (FDV-1), Fire Dragon Volcano 2 (FDV-2), Geolin Mounds (GLM), Penglai Fault Zone (PFZ), and Yonaguni Knoll IV (YK4-1). In order to monitor hydrothermal activity in the southwestern part of the SOT, a network of 6 OBSs was deployed during the OR2-2231 cruise in 2017, and the recording period was from April 7, 2017 to April 18, 2017. Harmonic tremor, a seismic signal that is generally associated with volcanic activity, was recorded at three of the OBSs. In this study, the methods used to study harmonic tremor include time-frequency analysis, model simulation, source direction analysis and quality factor estimation.
The result of time-frequency analysis of different OBSs demonstrates similar pattern, which shows a fundamental frequency of about 4 Hz. Each harmonic tremor event was not recorded in more than one station despite the fact that the distance between the stations is less than 7 km, suggesting that these signals should have originated very close to each receiver. In order to understand the source properties, the model simulation method proposed by Girona et al. (2019) was applied in this study. The result suggests that gas supply must contain certain degree of periodicity for the generation of harmonic tremor, and the variation of the dominant frequency may infer the condition of the hydrothermal sites. The source direction determined from the largest energy distribution shows a clear correlation with the gas plumes and submarine volcanoes position, inferring their causal relationship. However, the time-dependent variation for the source direction and the fundamental frequency may be associated to the different activity level of different sources or the fluid migration in the hydrothermal systems. Finally, the Q values are mainly lower than 20, which suggests that the composition of the hydrothermal fluids is stable during the studied period.
目錄

中文摘要 i
ABSTRACT ii
誌謝 iv
目錄 v
圖目錄 vii
表目錄 ix
一、緒論 1
1-1 研究動機與目的 1
1-2 諧波震顫概述 2
1-3 本文內容 3
二、研究區域地質背景 7
2-1 地體構造 7
2-2 沖繩海槽的熱液活動 8
三、研究方法與資料處理 28
3-1 儀器介紹 28
3-2 使用資料 28
3-3 研究方法原理 28
3-3-1 時頻分析 28
3-3-2 火山震顫模擬 29
3-3-3 海底地震儀方向校正與諧波震顫來源分析 31
3-3-4 卡方檢定(Chi-squared test) 32
3-3-5 衰減因子(Q value)分析 33
3-4 資料處理 33
3-4-1 資料處理流程 33
3-4-2 資料處理軟體介紹 34
四、結果與討論 40
4-1 諧波震顫的特性 40
4-2 諧波震顫來源分析 41
4-2-1 海底地震儀轉向結果 41
4-2-2 諧波震顫可能來源 41
4-3 基頻模擬結果 43
4-4 研究區域Q值分布 45
五、結論 63
參考文獻 65
Auffret, Y., Pelleau, P., Klingelhoefer, F., Geli, L., Crozon, J., Lin, J., & Sibuet, J.-C., "MicrOBS: A new generation of ocean bottom seismometer.", first break, Vol 22, 2004, pp. 41-47.
Chang, E. T., Hsu, S.-K., & Chao-Shing, L, "Earthquake swarm recorded by an ocean bottom seismic array in southwest offshore of Taiwan in October, 2005.", Terr. Atmos. Ocean. Sci., Vol 19, 2008, pp. 717-728.
Chen, S., Lin, J., Su, C., & Doo, W.., "Introduction to the special issue on tectonic environment and seabed resources of the south.", Terr. Atmos. Ocean. Sci., Vol 30, October 2019, pp. 605-611.
Cohen, L, Time-frequency analysis, Prentice Hall PTR Englewood Cliffs, NJ, 1995.
Doo, W.-B., Hsu, S.-K., Wang, H.-F., Huang, Y.-S., Tsai, C.-H., Lo, C.-L., et al, "A deep-towed magnetic survey in the southern Okinawa Trough: Implications for hydrothermal system detection." Terr. Atmos. Ocean. Sci., Vol 30, October 2019, pp. 675-683.
Fee, D., Garcés, M., Patrick, M., Chouet, B., Dawson, P., & Swanson, D., "Infrasonic harmonic tremor and degassing bursts from Halema'uma'u Crater, Kilauea Volcano, Hawaii.", Journal of Geophysical Research: Solid Earth, Vol 115, 2010, B11316.
Finkl, C. W, The encyclopedia of applied geology., United States, 1984.
Franek, P., Mienert, J., Buenz, S., & Géli, L., "Character of seismic motion at a location of a gas hydrate‐bearing mud volcano on the SW Barents Sea margin.", Journal of Geophysical Research: Solid Earth, Vol 119, 2014, pp. 6159-6177.
Gena, K., Chiba, H., Kase, K., Nakashima, K., & Ishiyama, D., "The Tiger Sulfide Chimney, Y onaguni K noll IV Hydrothermal Field, S outhern O kinawa T rough, J apan: The First Reported Occurrence of P t–C u–F e‐Bearing Bismuthinite and S n‐Bearing Chalcopyrite in an Active Seafloor Hydrothermal System.", Resource geology, Vol 63, 2013, pp. 360-370.
Girona, T., Caudron, C., & Huber, C., "Origin of shallow volcanic tremor: The dynamics of gas pockets trapped beneath thin permeable media.", Journal of Geophysical Research: Solid Earth, Vol 124, 2019, pp. 4831-4861.
Hotovec, A. J., Prejean, S. G., Vidale, J. E., & Gomberg, J., "Strongly gliding harmonic tremor during the 2009 eruption of Redoubt Volcano.", Journal of Volcanology and Geothermal Research, Vol 259, 2013, pp. 89-99.
Hsu, H.-H., Lin, L.-F., Liu, C.-S., Chang, J.-H., Liao, W.-Z., Chen, T.-T., et al, "Pseudo-3D seismic imaging of Geolin Mounds hydrothermal field in the Southern Okinawa Trough offshore NE Taiwan.", Terr. Atmos. Ocean. Sci., Vol 30, October 2019, pp. 705-716.
Huang, C.-Y., Shyu, C.-T., Lin, S. B., Lee, T.-Q., & Sheu, D. D., "Marine geology in the arc-continent collision zone off southeastern Taiwan: Implications for Late Neogene evolution of the Coastal Range.", Marine Geology, Vol 107, 1992, pp. 183-212.
Ishibashi, J.-i., Ikegami, F., Tsuji, T., & Urabe, T., "Hydrothermal activity in the Okinawa Trough back-arc basin: Geological background and hydrothermal mineralization.", in Subseafloor biosphere linked to hydrothermal systems, Springer, 2015, pp. 337-359.
Kedar, S., Kanamori, H., & Sturtevant, B., "Bubble collapse as the source of tremor at Old Faithful Geyser.", Journal of Geophysical Research: Solid Earth, Vol 103, 1998, pp. 24283-24299.
Kedar, S., Sturtevant, B., & Kanamori, H., "The origin of harmonic tremor at Old Faithful geyser.", Nature, Vol 379, 1996, pp. 708-711.
Klingelhoefer, F., Lee, C.-S., Lin, J.-Y., & Sibuet, J.-C., "Structure of the southernmost Okinawa Trough from reflection and wide-angle seismic data.", Tectonophysics, Vol 466, 2009, pp. 281-288.
Kotake, Y., "Study on the tectonics of western Pacific region derived from GPS data analysis.", Bull. Earthq. Res. Inst., Vol 75, Univ. Tokyo, 2000, pp. 229-334.
Kumagai, H., & Chouet, B. A., "Acoustic properties of a crack containing magmatic or hydrothermal fluids.", Journal of Geophysical Research: Solid Earth, Vol 105, 2000, pp. 25493-25512.
Letouzey, J., & Kimura, M., "The Okinawa Trough: genesis of a back-arc basin developing along a continental margin.", Tectonophysics, Vol 125, 1986, pp. 209-230.
Lin, J. Y., Sibuet, J. C., Lee, C. S., Hsu, S. K., & Klingelhoefer, F., "Origin of the southern Okinawa Trough volcanism from detailed seismic tomography.", Journal of Geophysical Research: Solid Earth, Vol 112, 2007, B08308.
Schlindwein, V., Wassermann, J., & Scherbaum, F., "Spectral analysis of harmonic tremor signals at Mt. Semeru volcano, Indonesia.", Geophysical research letters, Vol 22, 1995, pp. 1685-1688.
Shyu, C.-T., & Liu, C.-S, "Heat flow of the southwestern end of the Okinawa Trough.", TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 12(SUPP), 2001, pp. 305-318.
Sibuet, J. C., Deffontaines, B., Hsu, S. K., Thareau, N., Le Formal, J. P., & Liu, C. S, "Okinawa trough backarc basin: Early tectonic and magmatic evolution.", Journal of Geophysical Research: Solid Earth, Vol 103, 1998, pp. 30245-30267.
Sibuet, J. C., Letouzey, J., Barbier, F., Charvet, J., Foucher, J. P., Hilde, T. W., et al, "Back arc extension in the Okinawa Trough.", Journal of Geophysical Research: Solid Earth, Vol 92, 1987, pp. 14041-14063.
Stranne, C., O'Regan, M., Jakobsson, M., Brüchert, V., & Ketzer, M., "Can anaerobic oxidation of methane prevent seafloor gas escape in a warming climate?" Solid Earth, Vol 10, 2019, pp. 1541-1554.
Suzuki, R., Ishibashi, J. I., Nakaseama, M., Konno, U., Tsunogai, U., Gena, K., & Chiba, H., "Diverse range of mineralization induced by phase separation of hydrothermal fluid: Case study of the Yonaguni Knoll IV Hydrothermal Field in the Okinawa Trough Back‐Arc Basin.", Resource geology, Vol 58, 2008, pp. 267-288.
Trauth, M. H., Gebbers, R., Marwan, N., & Sillmann, E., MATLAB recipes for earth sciences, Vol 34, Berlin, Springer, 2007.
Tsai, C.-H., Hsu, S.-K., Chen, Y.-F., Lin, H.-S., Wang, S.-Y., Chen, S.-C., et al, "Gas plumes and near-seafloor bottom current speeds of the southernmost Okinawa Trough determined from echo sounders.", Terr. Atmos. Ocean. Sci., Vol 30, Ocober 2019, pp. 649-674.
Watanabe, H., & Kojima, S., "Vent fauna in the Okinawa Trough.", in Subseafloor biosphere linked to hydrothermal systems, Springer, 2015, pp. 449-459.

王兆璋:〈臺灣東北海域礦產資源潛能調查:地球化學與海床觀測調查研究(1/4)海床表面礦物影像探查與採樣〉,《經濟部中央地質調查所報告》,第 105-14- B 號,2016,共70頁。
江威德:〈臺灣東北海域礦產資源潛能調查-地球化學與海床觀測調查研究(3/4)熱液礦石與脈石之礦物分析〉,《經濟部中央地質調查所報告》,第 107-1- C 號,2018,共201頁。
李易隆:〈台灣東北部海域海底火山與熱液噴泉之研究〉。碩士論文,國立臺灣海洋大學,2005。
林殿順:〈臺灣東北海域礦產資源潛能調查-震測及地熱流調查研究(3/4)地質構造、火成活動與沉積特徵研究〉,《經濟部中央地質調查所報告》,第 107-13-C 號,2018,共82頁。
許樹坤:〈臺灣東北海域礦產資源潛能調查-高解析聲納及磁力調查研究(2/4)〉,《經濟部中央地質調查所報告》,第 106-13 號,2017,共237頁。
許樹坤:〈臺灣東北海域礦產資源潛能調查-高解析聲納及磁力調查研究(4/4)〉。《經濟部中央地質調查所報告》,第 108-14 號,2019,共 277 頁。
陳信宏:〈臺灣東北海域礦產資源潛能調查-地球化學與海床觀測調查研究(2/4)海床表面礦物影像調查與採樣〉,《經濟部中央地質調查所報告》,第 106-14- B 號,2017,共156頁。
劉家瑄:〈臺灣東北海域礦產資源潛能調查—震測及地熱流調查研究(1/4)反射震測與海床聲納回聲剖面調查研究〉,《經濟部中央地質調查所報告》,第 105-12-A 號,2016,共83頁。
劉家瑄:〈臺灣東北海域礦產資源潛能調查—震測及地熱流調查研究(2/4)總論〉,《經濟部中央地質調查所報告》,第 106-12 號,2017,共133頁。
劉家瑄:〈臺灣東北海域礦產資源潛能調查-震測及地熱流調查研究(3/4)地熱流調查與流體移棲模式研究〉,《經濟部中央地質調查所報告》,第 107-13-B 號,2018,共63頁。
蔡慶輝:〈沖繩海槽南端的火山及熱液作用之初步研究〉。碩士論文,國立臺灣海洋大學,1999。
蘇志杰:〈臺灣東北海域礦產資源潛能調查:地球化學與海床觀測調查研究(1/4)總論與地球化學調查研究〉,《經濟部中央地質調查所報告》,第 105-14-A 號,2016,共204頁。
蘇志杰:〈臺灣東北海域礦產資源潛能調查地球化學與海床觀測調查研究(2/4)地球化學調查研究〉,《經濟部中央地質調查所報告》,第 106-14-A 號,2017,共223頁。
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top