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研究生:李思霖
研究生(外文):sy-lin lee
論文名稱:車籠埔斷層南段之地電研究
論文名稱(外文):A geoelectric study of the southern segment of the Chelungpu fault
指導教授:陳平護陳平護引用關係
指導教授(外文):ping-hu cheng
學位類別:碩士
校院名稱:國立中央大學
系所名稱:地球物理研究所
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:2002
畢業學年度:90
語文別:中文
論文頁數:74
中文關鍵詞:斷層電阻率影像剖面車籠埔斷層大尖山斷層
外文關鍵詞:Chelungpu faultDajienshen faultresistivity image profilingfault
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本研究對車籠埔斷層南段的地表破裂進行二維的電阻率影像剖面探測,了解斷層地表下電阻率分布,並推測斷層在地表下的地層分布及構造形貌,獲得以下結論:(1)斷層所處地形及地層的特性,可將九二一地震斷層在竹山南部分段,北為車籠埔斷層,南則為大尖山斷層的起點。(2)振興地區表層為厚15公尺麓山帶堆積層,電阻率40-60 Ω.m。錦水頁岩電阻率10-60 Ω.m。下盤的礫石層電阻率100-600 Ω.m,與下伏錦水頁岩為不整合接觸。斷層傾角60-70度向東。(3)濁水地區、水底寮地區和他里塭地區表層為礫石層,厚度10-20公尺不等,電阻率100-5000 Ω.m。錦水頁岩電阻率5-60。下盤礫石層近斷層受擠壓增厚,電阻率100-2400,隨深度增加漸變為含泥礫石層,電阻率10-300。斷層傾角為40-80度向東。(4)外埔子地區表層分布厚約2-5公尺局部不連續的礫石層,電阻率為100-1000 Ω.m。錦水頁岩電阻率5-60 Ω.m,下盤之礫石層電阻率100-300 Ω.m。此處斷層出露所在的東埔蚋溪局部沿斷層發育。(5)竹山地區顯示表層礫石層厚度5-20公尺不等,電阻率80-800 Ω.m。錦水頁岩電阻率40-60 Ω.m,下盤之礫石層電阻率100-2000 Ω.m,斷層傾角為60-80度向東。(6)抄封地區深度60公尺以上為階地礫石層,電阻率100-800 Ω.m,下伏為卓蘭層,電阻率10-80 Ω.m,兩地層以不整合接觸。測線J-J’水平位置32公尺與88公尺處皆為地形高起階地,為曾經錯動過的斷層帶,斷層面視傾角為60-70度向東。(7)林頂地區表層為厚5-15公尺不等的階地礫石層,電阻率100-2000 Ω.m,下伏為桂竹林層,電阻率5-60Ω.m。斷層傾角為40-70度向東。
The resistivity image profiling methed is were used to investigate the feature of the electric resistivity structures ane the subsurface structure of southern segment of the Chelungpu fault. Several conclusions can be drawn as follows:(1)According to the geoelectric characteristic of the formations was able to paragraph of the Chinshi south on the 921 earthquake fault. Northern segment was Chelungpu fault. Southern segmernt was starting point of Dajianshan fault.(2)Detritus of foothill has a thickness of about 15 meters and a resistivity of about 40-60 Ω.m in the surface of Jennshing area. Resistivity of Chinshui Shale is about 10-60 Ω.m. Resistivity of Gravel formation of footwall is about 100-600 Ω.m. Chinshui Shale does not have uniform contact within its Gravel formations. The fault dips eastward at an angle of about 60-70 degrees. (3)Gravel formation thickness is about 10-20 meters and resistivity is about 100-5000 Ω.m in surface of Jwoshoei, Shoeidiliau and Taliuen area. Resistivity of Chinshi Shale is about 5-60 Ω.m. Gravel formation of the footwall near the fault has thickened due to pressure and its resistivity is 100-2400 Ω.m. Deeper into the formation, the gravel turns oozy and the resistivity is 10-300. The fault dips eastward at an angle of about 40-80 degrees.(4)Waipuzi area thickness is about 2-5 meters of non-continuous gravel formation, Resistivity is 100-1000 Ω.m. Resistivity of chinshi shale is about 5-60. Resistivity of Gravel formation at footwall is 100-300 Ω.m. This fault zone appears at Dongpuna river part of it is growing.(5)Gravel formation thickness is about 5-20 meters and resistivity is about 80-800 Ω.m in surface of Chushan area. Chinshui shale is about 40-60 Ω.m. Resistivity of Gravel formation at footwall is 100-2000 Ω.m. The fault dips eastward at an angle of about 60-80 degrees.(6)The area depth 60m or higher is terrace deposit of Chaofeng, resistivity is about 100-800 Ω.m. Below 60m depths is cholan formation, resistivity is about 10-80 Ω.m. The two areas are unconformity contact. The measurable line J-J’. Horizontal line between 32m and 88m are terraces. Used to be a fault zone. The fault apparent dips eastward at an angle of about 60-70 degrees. (7)Gravel formation thickness is about 5-15 meters terrace deposits and resistivity is about 100-2000 Ω.m in surface of Linding area. Below is kueichulin formation, resistivity is 5-60 Ω.m. The fault dips eastward at an angle of about 40-70 degrees.
目 錄
頁次
論文提要 i
誌謝 ii
目錄 iii
圖目 v
表目 vii
第一章 緒論 1
1.1 研究動機及目的 1
1.2 文獻回顧 3
1.3 本文內容 3
第二章 研究區域概述 4
2.1 研究區域位置及地理環境概況4
2.2 研究區域地質概況 4
2.3 斷層地表破裂概述 9
第三章 研究原理及方法 10
3.1 直流電阻法 10
3.2 直流電阻法施測方法 12
3.3 直流電阻法儀器系統 16
3.4 資料處理與解釋 16
第四章 結果與討論 19
4.1 振興地區 19
4.2 濁水地區26
4.3 水底寮地區30
4.4 他里塭地區34
4.5 外埔子地區39
4.6 竹山地區43
4.7 抄封地區50
4.8 林頂地區58
4.9 綜合討論66
第五章 結論69
參考文獻 71
英文摘要 73
Chang, S. L., 1971, Subsurface geologic study of the TaiChung Basin, Taiwan. Petro. Geol. Taiwan. 8, 21-45.Cheng, P. H., 2000. Imaging the subsurface structure of the northern tip of the 1999 Chi-Chi earthquake fault in central Taiwan using the electric resistivity method. TAO, 11, 721-734.Degroot-Hedlin, C., and Constable, S., 1990, Occam’s inversion to generate smooth, two-dimensional model from magnetotelluric date: Geophysics, 55, 1613-1624.Griffiths, D. H., and Barker, R. D., 1993, Two-dimensional resistivity imaging and modeling in areas of complex geology: Journal of Applied Geophysics, 29, 211-226.Koefoed, O., 1979, Geosounding Principles 1: resistivity sounding measurements. Elsevier Scientific Publ. Co. 278 .Lee, T. S.,1949, The topographic reflection of subsurface structures as shown by the gravity anomaly in the western plain of Taiwan. Geophys. Soc. Jour., vol.1, no.2, 205-212.Loke, M. H., 1998, Rapid 2D resistivity and IP inversion, using the least-squares method. Advanced Geoscience, Inc. U.S.A.Pan, Y. S., 1967, Interpretation and seismic coordination of the Bouguer gravity anomalies over west-central Taiwan.Pertol. Geol. Taiwan,no.5, 99-115.Sasaki, Y., 1992, Resolution of resistivity tomography inferred from numerical simulation: Geophysical Prospecting, 40, 453-464.李元希、盧詩丁、石同生,2001,車籠埔斷層特性,經濟部中央地質調查所九十年度成果發表及業務檢討會手冊,12-13頁。李建成、陳于高、謝凱瑞、朱傚祖、詹瑜璋、陳文山,2001,車籠埔斷層構造與古地震研究:霧峰車平營附近槽溝開挖分析研究,中國地質學會九十年年會暨學術研討會,6-8頁。李錦發、劉桓吉,1998,五萬分之一台灣地質圖,圖幅第號-雲林圖幅。經濟部中央地質調查所。陳文山、黃能偉、李昆杰、陳于高、宋國城、張徽正、李元希、石瑞詮、楊志成、宋時驊、林清正、李龍昇,2001,集集地震斷層與鄰近地區斷層的特性,中國地質學會九十年年會暨學術研討會,39-41頁。陳平護、葛岳淵、王衍評,2000,應用電阻法描繪台灣中部車籠埔斷層之地下構造,第八屆台灣地區地球物理研討會論文集,528-533頁。陳勉銘、何信昌,2000,台中區地質-兼論九二一地震斷層。經濟部中央地質調查所特刊,第十二號,113-138頁。陳華玟、石同生、邵屏華、陳政恆、李松勇,2001,南投圖幅地質調查,經濟部中央地質調查所九十年度成果發表及業務檢討會手冊,15-16頁。董倫道、楊潔豪、陳平護,1996,濁水溪沖積扇地球物理探測與地層對比,經濟部中央地質調查所,110-128頁。楊貴三,1986,台灣活斷層的地形學研究-特論活動斷層與地形面的關係。私立中國文化大學地學研究所博士論文,共178頁。經濟部中央地質調查所,2000,九二一地震地質調查報告,經濟部中央地質調查所出版,共315頁。
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