Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault
碩士 === 國立中央大學 === 應用地質研究所 === 92 === We defined four fault zones in the depth from 110 to 182m for the southern drilling core of the Chelungpu fault. The following methods are used in the study: X-ray fluorescence analysis (XRF), X-ray diffraction analysis (XRD), Petrographic observation and Isocon...
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ndltd-TW-092NCU055030202016-06-08T04:13:37Z http://ndltd.ncl.edu.tw/handle/73222193366789943769 Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault 地震斷層作用後的流體滲透作用:檢視車籠埔斷層南投井斷層岩之化學及礦物組成 Chung-Bin Lu 盧崇賓 碩士 國立中央大學 應用地質研究所 92 We defined four fault zones in the depth from 110 to 182m for the southern drilling core of the Chelungpu fault. The following methods are used in the study: X-ray fluorescence analysis (XRF), X-ray diffraction analysis (XRD), Petrographic observation and Isocon method. By integrating the XRD, XRF and petrographic data, we have derived some chemical reactions to explain the chemical input and output between altered rocks and their protoliths. Results of semi-quantitative XRD analysis show that kaolinite increases while montmorillonite decreases from undamaged rocks to seriously faulted rocks. From the whole-rock analyses, SiO2 gradually decrease while Al2O3, Fe2O3 and MgO increase from undamaged rocks to seriously faulted rocks. Volatile contents (LOI and CO2) are increased 1~4 times as high in the pseudotachylite compared to the standard host rock. In the Chelungpu fault zone, we use TiO2 as the immobile reference. A prominent volume loss process possibly caused by mechanical compaction is suggested by chemical isocon analysis. The gradual changes in chemical and mineralogical compositions from undamaged rocks to a fault center is probably due to fluid infiltration after seismic faulting. Wei-min Donald Chen 陳維民 2004 學位論文 ; thesis 100 zh-TW |
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碩士 === 國立中央大學 === 應用地質研究所 === 92 === We defined four fault zones in the depth from 110 to 182m for the southern drilling core of the Chelungpu fault. The following methods are used in the study: X-ray fluorescence analysis (XRF), X-ray diffraction analysis (XRD), Petrographic observation and Isocon method. By integrating the XRD, XRF and petrographic data, we have derived some chemical reactions to explain the chemical input and output between altered rocks and their protoliths. Results of semi-quantitative XRD analysis show that kaolinite increases while montmorillonite decreases from undamaged rocks to seriously faulted rocks. From the whole-rock analyses, SiO2 gradually decrease while Al2O3, Fe2O3 and MgO increase from undamaged rocks to seriously faulted rocks. Volatile contents (LOI and CO2) are increased 1~4 times as high in the pseudotachylite compared to the standard host rock. In the Chelungpu fault zone, we use TiO2 as the immobile reference. A prominent volume loss process possibly caused by mechanical compaction is suggested by chemical isocon analysis.
The gradual changes in chemical and mineralogical compositions from undamaged rocks to a fault center is probably due to fluid infiltration after seismic faulting.
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author2 |
Wei-min Donald Chen |
author_facet |
Wei-min Donald Chen Chung-Bin Lu 盧崇賓 |
author |
Chung-Bin Lu 盧崇賓 |
spellingShingle |
Chung-Bin Lu 盧崇賓 Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault |
author_sort |
Chung-Bin Lu |
title |
Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault |
title_short |
Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault |
title_full |
Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault |
title_fullStr |
Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault |
title_full_unstemmed |
Fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form Nantou well of the Chelungpu fault |
title_sort |
fluid infiltration after seismic faulting: examining chemical and mineralogical composition of the fault rocks in the drilling cores form nantou well of the chelungpu fault |
publishDate |
2004 |
url |
http://ndltd.ncl.edu.tw/handle/73222193366789943769 |
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