研究生: |
林朝彥 LIN, Chao-Yan |
---|---|
論文名稱: |
花蓮和平溪下游變質花崗岩之脆韌性與脆性構造研究與其地質意義 Study of Brittle-Ductile and Brittle Structures of Meta-Granite and Their Geological Meanings in Downstream Area of Hoping River, Hualien. |
指導教授: |
葉恩肇
Yeh, En-Chao |
學位類別: |
碩士 Master |
系所名稱: |
地球科學系 Department of Earth Sciences |
論文出版年: | 2015 |
畢業學年度: | 104 |
語文別: | 中文 |
論文頁數: | 106 |
中文關鍵詞: | 脆韌性構造 、脆性構造 、岩心描述 、和平溪 、假玄武玻璃 、花蓮 |
英文關鍵詞: | Brittle-Ductile Structure, Brittle Structure, Core Observation, Hoping River, Pseudotachylyte, Hualien |
DOI URL: | https://doi.org/10.6345/NTNU202204800 |
論文種類: | 學術論文 |
相關次數: | 點閱:115 下載:13 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
依目前的地體架構而言,台灣島主要由於歐亞板塊與菲律賓海板塊斜向碰撞而造就今日的主體,並使台灣脊樑山脈呈現東北-西南走向,但大南澳變質雜岩的構造骨幹於脊樑山脈北段有從東北向轉折至東西向的現象,且由於隱沒反轉,使得造成台灣北部受到沖繩海槽的弧後擴張作用。和平溪正位於歐亞板塊與菲律賓海板塊的隱沒反轉帶,使和平溪中下游目前處於北部脊樑山脈構造骨幹旋轉的軸心區域,可能同時受到造山擠壓與弧後張裂作用之影響,為一個研究應力轉換的適當區域。為了重建此地區地質構造與應力演化史,除了於花蓮和平溪中下游的變質花崗岩與大理岩地區進行野外調查,也進行600公尺變質花崗岩岩芯描述,針對區域葉理面發育後的脆韌性構造與脆性構造進行研究與分期。詳細而言,野外調查著重於地質構造之量測與截切關係之判定,進而推演應力演化模式。整合野外與岩心資料,進行構造分期與應力反演,進而推演構造應力演化模型。
研究結果顯示本地區構造先後順序為:(1)區域葉理與早期石英礦脈;(2)假玄武玻璃;(3)壓扁構造;(4)急折帶;(5)斷層擦痕;(6)開口導水裂隙與方解石脈。並且在上述構造中藉由古應力分析結果指示,其應力場順序為:(1)北偏東83o擠壓之逆斷層應力場(區域葉理);(2)北偏東51o拉張之正斷層應力場(假玄武玻璃);(3)南北向擠壓之走向滑移斷層應力場(急折帶);(4)南偏西67o擠壓之走向滑移斷層應力場;(5)北偏西84o拉張之正斷層應力場;(6)於開口填充裂隙中之北偏東69o拉張之正斷層應力場。
彙整上述成果,本研究探討各期構造於花蓮和平地區地體構造演化的可能地質意義:區域葉理應力場反映歐亞板塊與菲律賓海板塊斜向碰撞時期的應力場;假玄武玻璃和壓扁構造可能代表同造山時期之陷落構造的證據;急折帶構造可能為沖繩海槽擴張的證據,並認為沖繩海槽擴張為主要的應力來源,但水平擠壓方向為東南-西北向,並無法排除斜向碰撞的可能性;而之後轉變為拉張性環境之正斷層機制。
According to tectonic setting, the NE-trending Taiwan island is the consequence of oblique collision between the Eurasian Plate and the Philippine Sea Plate. Because the subduction flip between two plates results in the southward propagation of Okinawa Trough, the northeastern Taiwan is also influenced by the back-arc extension of the Okinawa Trough. In the northeastern Taiwan, the structural grain of the northern Backbone Range changes from northeast to east-west. Downstream area of the Hoping River, Hualien is located at the rotation axis of structural grain and also is located above the transition zone of subduction flip. As a result, the downstream area of the Hoping River is great place to study the stress interactions between mountain building and back-arc extension. To reconstruct regional structures and stress evolution, beside field investigation on the meta-granite and marble, 600m core examination of meta-granite is also carried out and focused on the study of brittle-ductile and ductile structures after the foliation development. In details, field work emphases on measuring structure attitudes and identifying cross-cutting relationships and furthermore placing constraints on stress evolution model. Study of core examination compensates the lack of outcrops
The sequence of structure development associated with stress field in the region is identified as: (1) regional foliation and early quartz veins in reverse faulting stress regime with SE-NW compression; (2) pseudotachylyte in normal faulting stress regime; (3) flattened structure; (4) kink in strike-slip faulting stress regime with N-S compression; (5) fault slip in strike-slip faulting stress regime with SE-NW compression;(6) open filling fluid conduits and calcite veins in normal faulting stress regime with NE-SW extension.
Synthesizing the structure characteristics associated with stress field, tectonic meanings of each structure in terms of structural evolution in the Hoping region, Hualien is interpreted. The stress field of regional foliation is reflective of oblique compression between Eurasian and the Philippine Sea Plates. Pseudotachylite and flattening structure may represent evidence of syn-tectonic extension. SE-NW compression inferred from kink band may correspond to the back-arc extension of Okinawa Trough but the compression of oblique collision still can not be ruled out. NE-SW extensional environment of normal faulting stress regime is appeared.
英文部分
Anderson, E. M. (1951) The Dynmamics of Faulting,Edinburgh, Oliver and Boyd.
Angelier, J. (1986) Geodynamics of the Eurasian-Philippine Sea Plate Boundary. Special Issue, Tectonophysics, 125, IX-X.
Biq, C. (1972) Dual-trench in the Taiwan-Luzon region. Proceedings of the Geological Society of China, 15, 65-75.
Bowin, C., Lu, R.S., Lee, C.S., and Schouten, H. (1978) Plate convergence and accretion in Taiwan-Luzon region. American Association of Petroleum Geologists Bulletin, 62, 1645-1672.
Chai, B.H.T. (1972) Structure and tectonic evolution of Taiwan. American Journal of Science, 272, 389-422.
Chu, H.T., Hwang, S.L., Shen, P., and Yui, T.F. (2012) Pseudotachylyte in the Tananao Metamorphic Complex, Taiwan: Occurrence and dynamic phase changes of fossil earthquakes. Tectonophysics, 581, 62-75.
Francis, P.W. (1972) The pseudotachylyte problem, comments on Earth Sciences. Geophysics, 3, 35-53.
Ho, C.S. (1986) A synthesis of the geologic evolution of Taiwan. Tectonophysics, 125, 16.
Huang, H.H., Shyu, J.B.H., Wu, Y.M., Chang, C.H., and Chen, Y.G. (2012) Seismotectonics of northeastern Taiwan: Kinematics of the transition from waning collision to subduction and postcollisional extension. Journal of Geophysical Research, 117, B01313, doi:10.1029/2011JB008852.
Lee, C.T. and Wang, Y. (1988) Quaternary stress changes in northern Taiwan and their tectonic implication. Proceedings of the Geological Society of China, 31, 154-168.
Lin, A., Sun, Z., and Yang, Z. (2003) Multiple generations of pseudotachylyte in the brittle to ductile regimes, Qinling-Dabie Shan ultrahigh-pressure metamorphic complex, central China. Island Arc, 12, 423-435.
Passchier, C.W. (1982) Pseudotachylyte and the development of ultramylonite bands in the Saint-Barthelemy Massif, French Pyrenees. Journal of Structural Geology, 4, 69-79.
Shand, S.J. (1916) The pseudotachylyte of Parijs (Orange Free State), and its relation to "Trap-shotten gneiss" and "Flinty crush-rock". Quarterly journal of the Geological Society of London, 72, 198-221.
Shyu, J.B.H., Sieh, K., and Chen, Y.G. (2005) Tandem suturing and disarticulation of the Taiwan orogen revealed by its neotectonic elements. Earth and Planetary Science Letters, 233, 167-177.
Sibson, R.H. (1975) Generation of pseudotachylite by ancient seismic faulting. Geophysical Journal of the Royal Astronomical Society, 43, 775-794.
Sibson, R.H. (1977) Fault rocks and fault mechanisms. Journal of Geological Society of London, 133, 191-213.
Teng, L.S. (1990) Geotectonic evolution of late Cenozoic arc-continent collision in Taiwan. Tectonophysics, 183, 57-76.
Teng, L.S. and Lin, A.T. (2004) Cenozoic Tectonics of the China Continental Margin: Insights from Taiwan. Geological Society, London, Special Publication, 226, 313-332.
Teng, L.S. (1996) Extensional collapse of the northern Taiwan mountain belt. Geology, 24, 949-952.
Wang, C.M. (1988) An outline of the Tananao Group. Proceedings of the Geological Society of China, 31(1), 4-10.
Wang, P.L., Lin, L.H., and Lo, C.H. (1998) 40Ar/39Ar Dating of mylonitization in the Tananao schist, eastern Taiwan. Journal of the geological society of China, 41, 159-183.
Wu, C.Y., Chu, H.T., Lo, C.H., Yui, T.F., Hwang, S.L., and Shen, P.Y. (2014) The style of exhumation under active transpressive tectonic regime: Revealed by laser-fusion 40Ar/39Ar ages of pseudotachylyte from eastern Taiwan. Geodynamics and Environment in East Asia, S7-P-18, November 12-15, Hualien, Taiwan.
Yen, T.P. (1954) Some geological problems on the Tananao Schist. Bulletin of the Geological Survey of Taiwan, 7, 47-50.
Yen, T.P. (1960) A stratigraphical study on the Tananao Schist in northern Taiwan. Bulletin of the Geological Survey of Taiwan, 12, 53-66.
Yu, S.B., Chen, H.Y., and Kuo, L.C. (1997) Velocity field of GPS stations in the Taiwan area. Tectonophysics, 274, 41-59.
Yu, S.B., Kuo, L.C., Punongbayan, R.S., and Ramos, E.G. (1999) GPS observation of crustal deformation in the Taiwan-Luzon region. Geophysical Research Letters, 26, 923-926.
Žalohar, J., and Vrabec, M. (2007) Paleostress analysis of heterogeneous fault-slip data: The Gauss method. Journal of Structural Geology, 29(11), 1798-1810.
中文部分
小笠原美津雄(1933)大南澳圖幅暨說明書(縮尺十萬分之一,圖幅第二號)。臺灣總督府殖產局,第656號。
王珮玲 (1998) 鉀長石氬40/氬39同位素熱年代學之研究與應用。國立臺灣大學地質學研究所博士論文,共198頁。
李元希(1997)臺灣中央山脈中段在蓬萊運動中的構造演化。國立臺灣大學地質學研究所博士論文,共202頁。
李偉誠 (2015)利用非彈性回復法評估花蓮和平地區與彰濱工業區之現地應力場。國立臺灣師範大學地球科學研究所碩士論文,共102頁。
林啟文、林偉雄(1995)臺灣地質圖幅暨說明書-三星(縮尺五萬分之一,圖幅第十五號)。經濟部中央地質調查所,共55頁。
焦中輝(1991)臺灣東部和平地區之地質構造及其演化。國立臺灣大學地質學研究所碩士論文,共92頁。
葉恩肇、李偉誠、孫天祥、林為人、林蔚、林鎮國、陳文山(2012)花蓮和平地區非彈性應變回復法之現地應力量測。地工技術,第131期,第23-34頁。
詹瑜璋(1990)臺灣中央山脈東翼和仁至三棧地區之韌性剪力構造研究。國立臺灣大學地質學研究所碩士論文,共71頁。
鄧屬予(2002)臺灣新生代大地構造:臺灣的大地構造。中國地質學會出版,第49-93頁。
鄧屬予(2007)臺灣第四紀大地構造。經濟部中央地質調查所特刊,第十八號,共24頁。
臺灣電力公司(2012)用過核廢料最終處置計畫潛在母岩特性調查與評估階段。臺灣電力公司,共285頁。
盧建成(1992)臺灣東部和平地區變質壓力-溫度-時間演化路徑及其構造運動之隱示。國立臺灣大學地質學研究所碩士論文,共130頁。
賴宛均(2013)臺灣東部和平地區剪動構造與其地質意義之關係。國立臺北科技大學資源工程研究所碩士論文,共63頁。
羅偉、何恭睿(2012)臺灣中央山脈東翼地質區和平溪以南的地質調查與地質特性。地工技術,第131期,第15-22頁。