本研究主要係以EBSD分析技術針對台灣本島高度應變石英雲母片岩中之石英為研究材料，進行其晶粒方位與變形行為之分析。
首先利用XRD以及EBSD、EDS等分析方法確認石英雲母片岩中含有石英、鈉長石、雲母三種礦物。之後為了探討石英之變形行為，而將石英的晶粒方向依{0002}方位可區分為三種不同類型：(0002)晶面平行於RD方向、(0002)晶面平行於ND方向、(0002)晶面平行於RD45度。結果顯示特定晶面的極圖發現部分方位的晶粒產生晶體旋轉(orientation spread)現象，此結果顯示晶粒在變形過程中發生轉動的情形。此外，通常晶體旋轉的晶粒，其kernel average misorientation (KAM)的平均值較高。因此，可以藉由KAM分析晶粒的變形量之大小，同時長寬比倒數之結果發現晶粒愈接近等軸晶的形貌，其變形程度愈低。
之後為了瞭解石英晶粒變形之機構，本研究藉Schmid factor預測不同方位的晶粒所啟動的滑移系統。從結果來看，{0002}晶面平行於RD方向的晶粒，主要以Basal滑移系統為主。{0002}晶面平行於ND方向的晶粒，主要以Prismatic滑移系統為主。{0002}晶面平行於RD45度的晶粒，主要以Basal或者Prismatic滑移系統為主。
最後針對大面積剪切帶進行EBSD分析，發現受到剪切應變作用下石英晶粒會以 {0002}晶面平行於ND方向的晶粒稱Type-II存在，表示{0002}晶面指向ND方向較在為受到剪切應變作用下不易轉動而較穩定。因此石英晶粒主要以 {0002}晶面平行於ND方向的晶粒可以視為剪切應變下穩定方位。

This study used EBSD analysis technology to establish a series of analyzes and discussions on the grain orientation and deformation behavior of quartz in the highly strained quartz mica schist in Taiwan Island.
Firstly, XRD, EBSD, and EDS were used to confirm that the quartz-mica schist contained three minerals: quartz, albite, and mica. Then, the crystal grain direction of quartz is divided into three different types by using different {0002} crystal plane orientations: {0002} crystal plane parallel to the RD direction, {0002} crystal plane parallel to the ND direction, and {0002} crystal plane parallel to the RD direction under 45O tilted angle. With the results of the pole figure of specific crystal planes, it can be found that some grains have orientation spread, which means that the grains rotate after deformation. Usually, the grains with orientation spread have a higher average KAM value. The degree of deformation of grains is analyzed by KAM, and the reciprocal of the aspect ratio is calculated to illustrate the relationship between grain morphology and deformation. The closer the grain is to the shape of equiaxed crystals, the lower the degree of deformation.

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