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Student Number 89642003
Author Tai-rong Guo(郭泰融)
Author's Email Address jackguo@itri.org.tw
Statistics This thesis had been viewed 2006 times. Download 974 times.
Department Graduate Institute of Geophysics
Year 2008
Semester 1
Degree Ph.D.
Type of Document Doctoral Dissertation
Language zh-TW.Big5 Chinese
Title Metamorphic type geothermal characteristics study by using integrated geophysical methods–Example from Jinlun geothermal
Date of Defense 2008-09-22
Page Count 130
Keyword
  • cap rock
  • geothermal
  • Jinlun
  • metamorphic
  • Abstract Geothermal resources exploitation is difficult at Taiwan area because of structure complexity and low permeability in metapelites. The low resistivity anomalies have generally been the main target for geophysical exploration of geothermal resources in many countries. It is worth further study that if there exists low resistivity anomaly in metamorphic geothermal area. Also, temperature and geothermal reservoir distribution are important information in future geothermal exploration in Taiwan area.
    This study aimed at the characterics study of Jinlun geothermal site which is located at southeast part of Taiwan. The lithology of Jinlun area is composed of slate and metasandstone. Incorporated with Audio frequency Magnetotellurics, gravity, nature gamma methods were conducted in this study to establish geothermal conceptual model.
    Two significant findings are proposed.
    1.High temperature gradient at Jinlun area could be the result of rapid uplift caused by subduction and exhumation at convergent margin. Recharge to the Jinlun geothermal system appears to be from high-elevation meteoric waters originating in the Central Range. These waters circulate to considerable depth where they are heated within the metamorphic basement. Under hydraulic head or buoyancy, hot water flow along RF2 to surface as hot spring. Saline fluid and clay alteration together with the high temperatures associated with geothermal activity tend to result lower resistivity area. The geothermal reservoir may located at the fracture zone which is caused by RF1.
    2.The low resistivity anomalies on geophysical exploration are important characteristics both on Jinlun and Chingshui geothermal area. This implies that low resistivity anomalies are also the main target for geothermal exploration at metamorphic area.
    Table of Content 摘要 I
    ABSTRACT II
    誌謝 IV
    目錄V
    圖目錄VII
    表目錄X
    1. 前言1
    1.1 概述1
    1.2 文獻回顧2
    1.3 本文內容5
    2. 研究理論與方法10
    2.1 重力法10
    2.1.1 原理10
    2.1.2 重力修正11
    2.1.3 海水重力效應14
    2.1.4 知本-金崙重力資料處理26
    2.2 大地電磁法31
    2.2.1 原理31
    2.2.2 野外測勘36
    2.2.3 海岸效應38
    2.2.4 資料處理43
    3. 金崙地熱區地質及地球物理特性50
    3.1 地質概述50
    3.1.1 地體構造50
    3.1.2 金崙地區地質構造50
    3.1.3 岩石組成51
    3.2 地下溫度解析61
    3.3 地球物理特性分析70
    3.3.1 重力構造分析70
    3.3.2 自然放射能特性分析76
    3.3.3 岩層電阻率特性82
    3.3.4 音頻大地電磁特性及解析85
    3.4 綜合判釋97
    4. 金崙地熱概念模式99
    4.1 地熱特性要素99
    4.1.1 熱源99
    4.1.2 水源100
    4.1.3 通路101
    4.1.4 低電阻層與地熱儲集層101
    4.2 地熱概念模式102
    5. 結論與建議110
    5.1 結論110
    5.2 討論與建議111
    參考文獻113
    附錄A 音頻大地電磁探測頻率與電阻率分布圖123
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    Advisor
  • Chieh-Hou Yang(楊潔豪)
  • Ping-Hu Chen(陳平護)
  • Chow-Son Chen(陳洲生)
  • Files
  • 89642003.pdf
  • approve in 2 years
    Date of Submission 2008-12-24

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