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Student Number 966202020
Author Ruei-Siang Ke(柯瑞祥)
Author's Email Address a7422fantasy@hotmail.com
Statistics This thesis had been viewed 1042 times. Download 263 times.
Department Graduate Institute of Geophysics
Year 2008
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Reflection Seismic Studies in the Puli Basin
Date of Defense 2009-06-16
Page Count 78
Keyword
  • puli
  • shallow seismic reflection
  • Abstract Reflection Seismic Studies in the Puli Basin
    Abstract
    The Taiwan island is located at the convergent boundary between the Eurasian plate and
    the Philippine sea plate. Due to plate collision, major compressions build up high mountains.
    However, in this compression dominated environment, there exist several basins in the
    southern portion of the Hsuehshan Range. How are these basins created in the mountain?
    What are their structures? How to integrate the basin structure with the periphery mountain
    orogeny? All these are important, challenging and interesting geological problems of Taiwan
    tectonics.
    In this study, we use the high-resolution shallow seismic reflection to explore the Puli
    basin. Two kinds of seismic sources are adopted: 1)’MiniVibe’: three long lines (each about
    1~3 km) with MiniVibe-sources are obtained to exhibit the basic feature of the Tertiary
    basement; 2) ‘EWG-III’: ten groups of short lines (each contains two crossing lines with
    700m long) are used to describe the 3D structure distribution. In addition, the data from a
    wide-angle refraction survey carried out in 2002 is also involved to set up constrains of the
    basin structure. The purposes are to find structures of the Quaternary stratum and the Tertiary
    basement and to investigate the mechanisms which generate the basin.
    The results show that the basement shape of Puli basin is like a shallow disc. The deepest
    part has a depth of about 720m near the center with a little shift to the west. The Quaternary
    formations above the basement contain two layers: a 200m-thick top flat layer dominated by
    gravels and a deeper 400m-thick curved layer with gravels interlaced with mud and sand. The
    deep gravel-mud-sand layer forms an angular unconformity with the top flat layer. The similar
    curved shape of this layer with the basement implies a synchronic structural movement. The
    basement belongs to the Baileng formation which has a Quartzitic-feldspathic sandstone at the
    top and a heavy argillite in the lower part. The reflection profiles demonstrate that the Baileng
    basement possesses two anticlines and one syncline. Moreover, no apparent evidences show
    traces of faults inside the basin except those on two sides such as the Deli fault which is quite
    clear in the seismic section. The P wave velocity is found to be 3000m/s in the top deposit
    layers and 4500m/s for the basement. The S wave velocities are 1600 m/s and 2700 m/s,
    respectively. It is inferred that the Puli basin is formed by the ‘down warping’ mechanism due
    to the compressions from both the west-east and north-south directions. In the later several ten
    thousand years, the tectonic movement may be ceased and a 200m flat layer is deposited at
    the top.
    Table of Content 目    錄
    頁碼
    中文摘要………………………………………………………………………i
    英文摘要………………………………………………………………………ii
    致謝……………………………………………………………………………iv
    目錄……………………………………………………………………………v
    圖目錄…………………………………………………………………………vii
    表目錄…………………………………………………………………………x
    第一章   緒論………………………………………………………………1
    1-1   研究動機與目的…………………………………………………1
    1-2   文獻回顧…………………………………………………………1
    1-3   本文內容…………………………………………………………3
    第二章   研究區域概述……………………………………………………8
    2-1   地理環境…………………………………………………………8
    2-2   區域地質之構造特性……………………………………………8
    第三章  野外施測及資料處理………………………………………19
    3-1   反射震測原理……………………………………………………19
    3-2   野外工作…………………………………………………………20
    3-2-1 儀器設備………………………………………………………20
    3-2-2 野外施測………………………………………………………22
    3-3   資料處理…………………………………………………………24
    3-3-1 SSS資料處理系……………………………………………24
    3-3-2 資料處理流程…………………………………………………25
    第四章  施測的結果…………………………………………………36
    4-1  炸測實驗…………………………………………………………36
    4-2  反射震測…………………………………………………………37
    4-2-1  長測線……………………………………………………………38
    4-2-2  短測線……………………………………………………………40
    第五章  討論與結論………………………………………………………60
    5-1  討論………………………………………………………………60
    5-2  結論………………………………………………………………65
    參考文獻………………………………………………………………………77
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    Advisor
  • Chien-Ying Wang(王乾盈)
  • Files
  • 966202020.pdf
  • approve immediately
    Date of Submission 2009-06-25

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