台灣的地質分區中，中央山脈東翼可區分為太魯閣帶和玉里帶，早期的研究指出這兩個變質帶之間為一條縱長的壽豐斷層所分隔，為東側高壓低溫玉里帶與西側高溫低壓太魯閣帶的分界，呈東北西南走向。但在已有文獻中，這一斷層的確實位置、性質、分佈及詳細情形始終沒有確定。
因此本研究將經由影像判釋與野外調查，選定萬榮地區之變質岩區經由進行細部路線地質調查，沿線並採集標本做伊萊石結晶度、鈉雲母存在指標的分析，並藉由觀察顯微尺度下剪動構造的主要剪動面及剪動方向，來判斷壽豐斷層是否存在及其相關的運動特性。
研究的結果顯示（1）太魯閣帶出露之岩性以石英雲母片岩、大理岩、綠泥石片岩及蛇紋岩等四種岩性為主；而玉里帶則是由變質過後的粗粒砂岩、綠泥石片岩及石墨片岩組成，從岩性上來看兩相異變質帶確有明顯之差異。（2）在兩相異變質帶交界區域發現一糜嶺岩帶，寬度在兩公里間，此發現代表在兩相異變質帶間具有斷層錯動之證據。（3）根據伊萊石結晶度分析，分析結果有一區塊結晶度指數明顯偏低，結晶度明顯較佳，而此區域可與野外所調查之糜嶺岩帶做良好的比對。（4）根據鈉雲母存在指標分析結果，發現研究區域共有七處採樣點有指示高壓環境礦物鈉雲母分佈，均位於玉里帶中或交界帶中，而在太魯閣帶其他區域則未發現鈉雲母。（5）根據微視構造分析成果，發現研究區域之剪動構造在糜嶺岩帶有方向相同之趨勢，其餘鄰近區域明顯較為凌亂，顯示糜嶺岩帶受剪方向皆為一致，而此糜嶺岩斷層帶之運動模式為逆衝與左移兼具。

In the geologic zone in Taiwan we may divide the eastern of central range into Tailuko belt and Yuli belt. The earlier research indicated that the two metamorphic belts were divided by the northeastern-southwestern extended Shoufeng fault which was the division between the eastern high-pressure and low-temperature Yuli belt and the western high-temperature and low-pressure Tailuko belt. However, the precise location, character and details of this fault in visible reference are remained confirmative yet.
Hence I picked the metamorphic rock area of Wanrung area to do this research by identifying and analyzing from image and field work. I collected samples alone the course for analyzing the illite crytallinity and the paragonite exist index. I also estimated the relatively dynamic characteristic of Shoufeng fault by observing the shear plane and shear direction of microscopic structure.
The results indicated that (1)The rock types of the outcrop in Tailuko belt was quartz-mica schist, marble, chlorite schist and serpentinite and the Yuli belt was composed by metamorphic sandstone, chlorite schist and graphite schist.We can tell the obvious difference between the two different metamorphic belts.(2)A 2km in width of mylonite zone was found in the boundary of the two different metamorphic belts. This founding represents the evidence of the fault dislocation between the two different metamorphic belts.(3)According to the analysis of the illite crytallinity, there was a region that had the low crystallinity index and the obviously better crystallinity. This region could be a good contrast with the mylonite zone.(4)According to the analysis of the paragonite exist index found out that in the Yuli belt and the mylonite zone are 7 samples indicated the region of high-pressure mineral─paragonite and it was not found in Tailuko belt.(5)According to the results of microscopic structural analysis found out that the mylonite zone of the shear structure in this research region had the same direction. The other near regions had the obviously shuffling directions that indicated the mylonite zone had the same shear direction therefore the dynamic pattern of the mylonite fault zone had the characteristics of left-handed and thrust-slip fault.

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