結論 - 利用GPS觀測資料探討宜蘭平原之現今地殼變形

變率為0.15-2.32 µstrain/yr，最小主軸應變率為-2.24-0.65 µstrain/yr。且主軸應變伸張方向，由西向東的變化從西北-東南逐漸轉成接近南北走向，故其伸張 µradian/yr及0.12-0.71 µradian/yr，宜蘭平原內部及牛鬥地區則為逆時針旋轉，

分別為-0.90至-0.02 µradian/yr及-0.52至-0.09 µradian/yr。

5. 藉由速度場速度向量的不連續及地質資料，推測宜蘭平原上可能有四條主要的活動構造，由北而南分別為牛鬥斷層、坑四斷層、濁水斷層及三星斷層等活動構造。

6. 綜合速度剖面及剪應變之結果，以蘭陽溪為界，蘭陽溪北側平原內為一系列

正斷層系統，唯坑四斷層帶有右移之分量。蘭陽溪南側則以正斷層系統帶有左移分量的橫移伸張變形為主。

7. 近期台灣東北地區受到沖繩海槽張裂之影響，造成早期造山時呈東北-西南走向之山脈，在受力彎曲時發生層間的左移滑動，此一構造行為即沿著地質弱帶發生，使得觀測到宜蘭平原南邊之正斷層帶有左移的分量。

8. 由速度剖面分析得知，蘭陽溪兩側之南北方向速度分量差異很大，南側之速度分量大於北側之速度分量，由此可知沖繩海槽為不對稱之弧後張裂，且南側之張裂速度較北側快。

9. 宜蘭平原觀察到速度場旋轉以及伸張應變旋轉之現象，是由於宜蘭平原西側同時受到菲律賓板塊的擠壓應力及琉球海溝隱沒後退所產生之伸張應力，形成了西北-東南之伸張方向之橫移壓縮環境；而平原東側則受到沖繩海槽張裂作用向南延伸之影響大於板塊碰撞之擠壓應力，因而轉為南北方向之伸張應變，因而轉為東北－西南或南北方向之橫移伸張變形或伸張變形之模式。

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附錄 A

Station Lon Lat VE VN SE SN V Azi

附錄 B

宜蘭地區內插點之應變率、旋轉率、面膨脹率以及剪應變率。

Lon Lat Eps1 Eps1(sig) Eps2 Eps2(sig) Theta The.(sig) Rotation Rot.(sig) Dilatation Dila.(sig) Gamma Gam.(sig) ( ^o ) ( ^o ) (strain/yr) (strain/yr) (strain/yr) (strain/yr) ( ^o ) ( ^o ) (radian/yr) (radian/yr) (strain/yr) (strain/yr) (strain/yr) (strain/yr) 121.78 24.53 2.32E-07 1.31E-07 -4.49E-07 1.92E-07 15.97 13.12 7.12E-07 1.72E-07 -2.18E-07 2.09E-07 6.81E-07 1.99E-07 121.81 24.53 2.57E-07 1.01E-07 -6.95E-07 1.12E-07 12.06 7.31 5.83E-07 1.29E-07 -4.38E-07 1.37E-07 9.53E-07 1.36E-07 121.84 24.53 2.47E-07 1.00E-07 -8.18E-07 1.14E-07 15.04 5.89 5.28E-07 1.20E-07 -5.71E-07 1.35E-07 1.07E-06 1.31E-07 121.54 24.56 6.66E-07 1.16E-07 -1.38E-07 8.67E-08 -55.62 4.93 -1.26E-07 7.02E-08 5.28E-07 1.49E-07 8.04E-07 8.48E-08 121.57 24.56 1.18E-06 1.68E-07 -8.45E-08 1.44E-07 -50.18 4.96 -1.47E-07 1.10E-07 1.10E-06 2.23E-07 1.27E-06 1.15E-07 121.75 24.56 1.14E-06 2.42E-07 -4.80E-07 1.18E-07 -29.04 4.95 3.10E-07 8.72E-08 6.57E-07 3.11E-07 1.62E-06 1.80E-07 121.81 24.56 1.99E-07 2.02E-07 -6.22E-07 1.55E-07 10.06 11.08 4.32E-07 1.63E-07 -4.23E-07 2.49E-07 8.21E-07 2.41E-07 121.84 24.56 1.83E-07 2.17E-07 -8.23E-07 1.96E-07 15.85 9.74 3.49E-07 1.82E-07 -6.40E-07 2.80E-07 1.01E-06 2.56E-07 121.51 24.59 1.46E-07 2.85E-08 -1.04E-06 2.19E-08 69.97 0.56 -5.13E-07 1.80E-08 -8.98E-07 3.60E-08 1.19E-06 2.99E-08 121.54 24.59 1.50E-07 3.67E-08 -6.29E-07 2.52E-08 77.03 0.72 -3.99E-07 2.22E-08 -4.79E-07 4.45E-08 7.80E-07 4.12E-08 121.57 24.59 3.56E-07 6.17E-08 -2.37E-07 4.00E-08 -78.45 1.39 -3.34E-07 3.70E-08 1.19E-07 7.35E-08 5.93E-07 6.92E-08 121.6 24.59 2.01E-06 1.86E-08 3.45E-08 1.64E-08 -39.23 0.31 -1.73E-07 1.40E-08 2.04E-06 2.13E-08 1.97E-06 1.44E-08 121.72 24.59 1.22E-06 2.19E-07 -1.18E-06 1.68E-07 -29.24 3.28 1.78E-07 1.40E-07 3.68E-08 2.74E-07 2.40E-06 1.86E-07 121.75 24.59 1.33E-06 1.71E-07 -9.56E-07 9.10E-08 -29.92 2.54 1.16E-07 6.70E-08 3.78E-07 2.22E-07 2.29E-06 1.26E-07 121.78 24.59 1.31E-06 1.26E-07 -4.53E-07 5.07E-08 -28.92 2.29 1.24E-07 3.91E-08 8.56E-07 1.59E-07 1.76E-06 9.09E-08 121.81 24.59 8.27E-07 1.56E-07 -3.73E-07 1.36E-07 -16.83 5.71 2.56E-07 1.28E-07 4.54E-07 1.97E-07 1.20E-06 1.78E-07 121.84 24.59 7.58E-07 1.53E-07 -4.88E-07 2.02E-07 -12.98 7.11 1.94E-07 1.61E-07 2.70E-07 2.45E-07 1.25E-06 2.31E-07 121.54 24.62 2.06E-07 3.72E-08 -8.90E-07 3.09E-08 75.00 0.63 -5.24E-07 2.41E-08 -6.84E-07 4.83E-08 1.10E-06 4.35E-08 121.57 24.62 5.47E-07 7.79E-08 -3.78E-07 7.49E-08 -80.48 1.09 -5.00E-07 5.37E-08 1.68E-07 1.08E-07 9.25E-07 1.04E-07 121.6 24.62 1.90E-06 2.79E-08 2.55E-08 2.56E-08 -41.59 0.54 -9.38E-08 2.02E-08 1.93E-06 3.52E-08 1.88E-06 2.05E-08

Lon Lat Eps1 Eps1(sig) Eps2 Eps2(sig) Theta The.(sig) Rotation Rot.(sig) Dilatation Dila.(sig) Gamma Gam.(sig) ( ^o ) ( ^o ) (strain/yr) (strain/yr) (strain/yr) (strain/yr) ( ^o ) ( ^o ) (radian/yr) (radian/yr) (strain/yr) (strain/yr) (strain/yr) (strain/yr) 121.66 24.62 1.43E-06 1.00E-07 -5.64E-07 9.93E-08 -42.09 1.82 -3.01E-07 7.73E-08 8.69E-07 1.27E-07 2.00E-06 7.79E-08 121.69 24.62 1.40E-06 1.18E-07 -9.13E-07 1.15E-07 -38.70 1.77 -3.00E-07 9.38E-08 4.91E-07 1.41E-07 2.32E-06 9.65E-08 121.75 24.62 1.04E-06 6.97E-08 -6.21E-07 5.99E-08 -31.58 1.57 1.90E-07 4.79E-08 4.14E-07 8.93E-08 1.66E-06 5.87E-08 121.78 24.62 1.08E-06 1.18E-08 -5.17E-07 1.12E-08 -33.86 0.29 1.52E-07 8.17E-09 5.65E-07 1.63E-08 1.60E-06 9.76E-09 121.81 24.62 1.28E-06 1.54E-07 -5.73E-10 1.21E-07 -15.72 4.60 -1.53E-07 1.05E-07 1.28E-06 1.93E-07 1.28E-06 1.74E-07 121.84 24.62 2.32E-06 3.56E-07 -1.48E-06 4.47E-07 -7.85 4.47 -8.95E-07 2.97E-07 8.43E-07 5.70E-07 3.79E-06 5.55E-07 121.6 24.65 1.54E-06 4.59E-08 -4.26E-07 6.41E-08 -55.84 1.07 1.16E-07 3.95E-08 1.11E-06 7.87E-08 1.96E-06 4.68E-08 121.63 24.65 1.57E-06 3.93E-08 -4.11E-07 5.02E-08 -53.43 0.85 5.95E-08 3.32E-08 1.16E-06 6.15E-08 1.98E-06 3.64E-08 121.66 24.65 1.39E-06 9.10E-08 -4.98E-07 9.16E-08 -43.49 1.69 -2.56E-07 7.25E-08 8.92E-07 1.11E-07 1.89E-06 7.26E-08 121.69 24.65 1.41E-06 4.15E-08 -5.10E-07 4.16E-08 -44.55 0.86 -1.49E-07 2.99E-08 9.02E-07 5.77E-08 1.92E-06 2.99E-08 121.72 24.65 1.30E-06 6.69E-08 -4.79E-07 6.88E-08 -42.66 1.57 -5.25E-08 4.73E-08 8.20E-07 9.73E-08 1.78E-06 4.78E-08 121.75 24.65 3.92E-07 1.13E-07 -5.08E-07 1.10E-07 -28.98 5.00 8.04E-08 8.06E-08 -1.16E-07 1.55E-07 8.99E-07 1.07E-07 121.78 24.65 4.61E-07 1.21E-07 3.23E-07 1.15E-07 -31.80 33.64 2.12E-07 8.92E-08 7.84E-07 1.58E-07 1.38E-07 1.06E-07 121.81 24.65 1.33E-06 1.31E-07 4.59E-07 1.15E-07 -1.09 6.32 -1.01E-07 9.59E-08 1.79E-06 1.74E-07 8.69E-07 1.74E-07 121.6 24.68 1.51E-06 7.58E-08 -2.75E-07 6.81E-08 -50.94 1.62 2.40E-07 5.04E-08 1.23E-06 1.03E-07 1.78E-06 5.37E-08 121.63 24.68 1.48E-06 1.54E-08 -2.61E-07 1.28E-08 -52.90 0.32 1.55E-07 9.88E-09 1.21E-06 2.02E-08 1.74E-06 1.10E-08 121.66 24.68 1.19E-06 7.30E-08 -3.64E-07 7.49E-08 -43.17 1.59 -7.43E-08 6.02E-08 8.23E-07 8.60E-08 1.55E-06 6.04E-08 121.69 24.68 1.23E-06 1.26E-08 -4.54E-07 1.29E-08 -43.83 0.31 -4.21E-08 8.96E-09 7.80E-07 1.81E-08 1.69E-06 8.98E-09 121.72 24.68 1.32E-06 4.76E-08 -4.01E-07 4.65E-08 -47.33 1.12 -1.19E-07 3.26E-08 9.22E-07 6.77E-08 1.72E-06 3.30E-08 121.75 24.68 1.33E-06 7.41E-08 1.95E-07 7.02E-08 -48.26 2.37 6.75E-08 5.46E-08 1.53E-06 9.47E-08 1.14E-06 5.53E-08 121.78 24.68 8.96E-07 6.37E-08 6.54E-07 1.12E-07 -18.57 17.06 -3.27E-07 7.79E-08 1.55E-06 1.22E-07 2.43E-07 1.08E-07 121.81 24.68 1.17E-06 1.38E-07 2.77E-08 1.66E-07 22.44 5.53 -3.81E-07 1.15E-07 1.20E-06 2.11E-07 1.14E-06 1.70E-07 121.84 24.68 1.33E-06 1.09E-07 -2.43E-07 1.90E-07 6.12 4.35 -5.92E-07 1.20E-07 1.09E-06 2.19E-07 1.57E-06 2.16E-07

Lon Lat Eps1 Eps1(sig) Eps2 Eps2(sig) Theta The.(sig) Rotation Rot.(sig) Dilatation Dila.(sig) Gamma Gam.(sig) ( ^o ) ( ^o ) (strain/yr) (strain/yr) (strain/yr) (strain/yr) ( ^o ) ( ^o ) (radian/yr) (radian/yr) (strain/yr) (strain/yr) (strain/yr) (strain/yr) 121.54 24.71 4.68E-07 1.51E-07 -5.47E-07 9.15E-08 -65.57 3.41 4.56E-07 1.06E-07 -7.98E-08 1.60E-07 1.01E-06 1.32E-07 121.63 24.71 1.01E-06 9.03E-08 -2.88E-07 1.03E-07 -39.01 2.94 9.09E-08 7.03E-08 7.23E-07 1.33E-07 1.30E-06 7.41E-08 121.66 24.71 1.06E-06 7.64E-08 -4.58E-07 8.03E-08 -40.84 1.98 1.88E-07 5.87E-08 6.00E-07 1.04E-07 1.52E-06 6.00E-08 121.69 24.71 1.15E-06 3.06E-08 -1.67E-07 2.77E-08 -41.47 0.89 5.04E-08 2.07E-08 9.86E-07 4.12E-08 1.32E-06 2.12E-08 121.72 24.71 1.29E-06 2.06E-08 -9.55E-08 1.92E-08 -39.16 0.58 -1.84E-08 1.42E-08 1.19E-06 2.79E-08 1.38E-06 1.50E-08 121.75 24.71 1.34E-06 5.99E-08 3.86E-07 6.24E-08 -43.67 2.64 -2.19E-07 4.25E-08 1.73E-06 8.79E-08 9.54E-07 4.26E-08 121.78 24.71 1.12E-06 3.01E-08 6.34E-07 1.57E-07 -1.90 7.69 -7.24E-07 6.47E-08 1.75E-06 1.60E-07 4.82E-07 1.60E-07 121.81 24.71 1.11E-06 2.99E-08 -8.16E-08 1.89E-07 -2.78 3.20 -8.05E-07 6.63E-08 1.03E-06 1.91E-07 1.19E-06 1.90E-07 121.57 24.74 6.09E-07 9.40E-08 -2.02E-07 2.23E-07 -11.02 4.63 -1.09E-07 4.93E-08 4.07E-07 2.50E-07 8.11E-07 2.32E-07 121.66 24.74 1.10E-06 8.09E-08 -4.56E-07 8.21E-08 -40.95 1.97 2.95E-07 6.17E-08 6.45E-07 1.07E-07 1.56E-06 6.29E-08 121.69 24.74 1.22E-06 2.92E-08 -1.25E-07 2.34E-08 -37.49 0.77 -1.89E-09 1.94E-08 1.10E-06 3.61E-08 1.35E-06 2.10E-08 121.72 24.74 1.32E-06 1.54E-08 -9.10E-08 1.28E-08 -35.73 0.40 -7.67E-08 1.03E-08 1.23E-06 1.96E-08 1.41E-06 1.16E-08 121.75 24.74 1.16E-06 5.36E-08 5.41E-07 9.27E-08 -28.72 4.96 -4.80E-07 5.21E-08 1.70E-06 1.09E-07 6.20E-07 7.31E-08 121.78 24.74 1.13E-06 2.80E-08 4.37E-07 1.71E-07 -6.46 4.84 -7.29E-07 5.64E-08 1.56E-06 1.75E-07 6.90E-07 1.71E-07 121.81 24.74 1.09E-06 3.37E-08 1.13E-07 2.27E-07 -10.30 4.09 -6.86E-07 6.01E-08 1.21E-06 2.35E-07 9.79E-07 2.21E-07 121.69 24.77 1.04E-06 1.22E-07 9.97E-08 5.46E-08 -26.45 4.05 2.65E-07 5.69E-08 1.14E-06 1.42E-07 9.38E-07 9.70E-08 121.72 24.77 1.27E-06 3.22E-08 -3.80E-08 2.19E-08 -33.81 0.87 -2.28E-08 1.86E-08 1.23E-06 4.02E-08 1.31E-06 2.30E-08 121.75 24.77 1.09E-06 4.62E-08 4.10E-07 1.04E-07 -15.91 4.86 -5.18E-07 5.75E-08 1.50E-06 1.14E-07 6.76E-07 1.01E-07 121.78 24.77 1.06E-06 4.56E-08 3.66E-07 1.47E-07 -19.45 5.37 -5.18E-07 5.09E-08 1.43E-06 1.65E-07 6.95E-07 1.32E-07 121.81 24.77 1.02E-06 6.60E-08 2.72E-07 2.19E-07 -23.76 7.92 -4.76E-07 5.90E-08 1.29E-06 2.59E-07 7.47E-07 1.80E-07 121.72 24.8 5.37E-07 4.80E-08 3.54E-07 1.06E-07 5.96 27.35 1.26E-07 8.86E-08 8.91E-07 1.15E-07 1.83E-07 1.14E-07 121.75 24.8 5.39E-07 8.42E-08 3.63E-07 1.02E-07 36.56 19.68 5.99E-08 7.35E-08 9.02E-07 1.19E-07 1.77E-07 7.83E-08 121.78 24.8 4.68E-07 2.43E-08 -1.93E-07 1.19E-07 -2.90 4.05 2.66E-07 4.65E-08 2.76E-07 1.21E-07 6.61E-07 1.21E-07

Eps1 為最大主應變速率。

Eps2 為最小主應變速率。

Theta 為最大主應變速率之方位角。

Rotation 為旋轉率。

Dilatation 為面膨脹率。

Gamma 為最大剪應變率。

(sig)為各項之誤差值。

附錄 C

宜蘭地區GPS 觀測站之時間序列。

在文檔中利用GPS觀測資料探討宜蘭平原之現今地殼變形 (頁 82-101)