1. 本研究發現利用河流階地投影與地下構造剖面做等尺度結合時,就可以量化 及反衍河階演育與地下構造變化的關聯性。
2. 屯子腳地震斷層與枕頭山斷層,不但在運動行為上有很大的差異,且在三度 空間分布型態截然不同,只是在高空俯視下的平面空間裡,兩斷層跡看似為 線性連接。
3. 紅土階地 Lt1 形成之後枕頭山斷層至少沿斷層面滑移 116 公尺;配合剖面回 復得知在三義斷層在紅土階地 Lt1 形成後曾經滑移 300 公尺。
4. 經由地下震測剖面重新解釋,中部地區車籠埔斷層向西發展的過程中,同時 也向北深入了三義斷層上盤相對較軟的錦水頁岩內,導致錦水頁岩在東勢背 斜之上,岩層局部增厚並在淺部地殼中發育內灣背斜。
5. 研究區域內紅土化階地群的演育主要受枕頭山斷層與三義斷層所主導;此 外,未紅土化階地群則受內灣背斜抬生所影響。
6. 本研究區域東起卓蘭西至枕頭山地區,經本文野外調查後發現,本區域淺在 地質災害包含斷層線出露、崩積作用、以及褶皺變形行為。斷層災害主要分 布於頭山斷層線形崖兩側,崩積所造成地質災害主要分布於研究區域所有高 位紅土階地面邊緣,另外在地表褶皺崖影響評估上主要分布於卓蘭至內灣一 帶。
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