臺灣地區低度變質碎屑岩分布範圍相當廣，而且，臺灣第一座地熱電廠即位在低度變質碎屑岩區域-清水地熱。因此，本研究計畫認為宜蘭土場-清水地熱區提供了一個很好的場址。首先，藉由X光繞射分析獲得在地熱徵兆區和非地熱徵兆區的黏土礦物種類，再者，由影像軟體分析岩石劈理特徵，最後，整合黏土礦物種類、岩石劈理特徵及伊萊石結晶度值，以達成獲得在熱液蝕變作用影響之下的指標性礦物、伊萊石結晶度值的指標及高嶺石與綠泥石礦物分布範圍。
The low grade meta-clastic rock is widely distribution in Taiwan, and the first the geothermal power plant is located in Chingshui Geothermal field of Taiwan that belongs to the low grade meta-clastic rock. Therefore, this project will select the Tuchang-Chingshui Geothermal Field areas as study areas. First, we analyze the clay mineral assemblages in geothermal and non-geothermal areas. Second, we use image software to identify the characteristics of rock cleavage. Finally, we integrate the clay mineral assemblages, illite crystallinity and contents of kaolinite and chlorite minerals to point out the indicators and hydrothermal alteration zone under hydrothermal alteration process.
