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    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/7310


    題名: 921斷層泥中奈米礦物微粒的探尋 與滑動時地層溫度標定;Nanometric characteristics of fault gouge on the Chi-Chi earthquake, Taiwan
    作者: 黃秉榮;Ping-Jung Huang
    貢獻者: 物理研究所
    關鍵詞: 921921
    日期: 2003-06-20
    上傳時間: 2009-09-22 10:54:56 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 地震發生時,所產生的能量與預期所要釋放出的能量低,因而,有自然學家推論地震發生時,滑動層中應存在單層的奈米級顆。而奈米級顆粒的存在,能使地震發生時所磨擦的能量減少。而本篇論文,發現到在921地震的滑動層中的確存在奈米級的顆粒,而奈米級的顆粒的最多的分佈範圍在10nm~40nm之間。另外,在X-光的繞射分析中,發現在滑動層中和滑動層的外圍的稜鐵礦(FeCO3)的強烈變化。在滑動層中,稜鐵礦在滑動層中,稜鐵礦幾乎消失不見,而碳酸鈣在地震的過程中,並沒太大變化,所以,推論在地震發生時滑動層當時的溫度介於兩者熔解溫度之間(580℃~894℃)。 Atomic force microscopy (AFM) and General Structure Analysis System (GSAS) program have been used to investigate the nanometric characteristics of the fault gouge in the 223.45 m cores of Chi-Chi earthquake. Nano grains were revealed in the slip zone, with a mean diameter is ~20nm, while only μm grains were found outside the slip zone. X-ray diffraction patterns were refined following the Reiveld refinement method and reveal three main structural phases, namely quartz (hexagonal P6222 symmetry of SiO2), siderite (R-3CH symmetry of FeCO3), and calcite (R –3cRS symmetry of CaCO3), respectively. Among them, FeCO3 shows a rapidly percentage reduction from being at 35% to at 4 % as the specimen were taken from depths of 223.37 m (outside of the fault gouge) to 224.45 m (the fault gouge), while the composition of CaCO3 remains essentially unchanged. This founding can be used as an indicator for the temperature of the slip zone during the earthquake.
    顯示於類別:[物理研究所] 博碩士論文

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