• 作者： 余樹楨;江威德
• 作者服務機構： 國立成功大學地球科學系
• 中文摘要： 海岸山脈都巒山層中的兩個沸石對，一為產於烏石鼻（長濱附近）玄武岩裂隙中的鈉沸石與方沸石；另一對為產於富里附近安山岩裂隙中的斜髮沸石與淡紅沸石。其中斜髮沸石之鑑定主要是依據其結構的特徵而非化學成份。 以上兩對沸石相信是都巒山層形成過程中的火山活動後期產物。方沸石中矽原子數與鋁原子數之此值偏低(2.0)指示烏石鼻的沸石對是經由火山活動後期熱液與玄武岩質母岩作用的結果。富里附近的安山岩中只出現斜髮沸石與淡紅沸石而沒有發現鈣十字石顯示該地區沸石之形成溫度相當低，可能不會超過150°c。
• 英文摘要： Two zeolite assemblages, natrolite-analcime and clinoptilolite-stellerite, occurring in the TuluanshanFormation of the Coastal Range were identified with the techniques of X-ray diffraction, atomic absorptionspectroscopy and electron probe analyses. The natrolite-analcime assemblage was found in association withbasaltic rocks in the Wu-shi-pi area near Changping; while the clinoptilolite-stellerite assemblage was dis-covered in the andesite near the Fu-Li area. The establishment of the identity for clinoptilolite is primarilybased on the crystal structure characteristics rather than the chemical composition criterion. The two zeolite assemblages examined in this study are believed to be the products of the post-volcanic activity connected to the Tuluanshan Formation in the Coastal Range. The low value of Si/Alratio (2.0) in the analcime zeolite indicates that the analcime crystals were probably formed through theinteraction of the post-volcanic hydrothermal solution with the host basaltic rocks. The presence of theclinoptilolite-stellerite assemblage and the absence of phillipsite in the Fu-Li zeolite zone suggest that thetemperature of formation of the zeolites in this area was extremely low, probably lower than 150°C.
• 中文關鍵字： zeolites; clinoptilolite and stellerite; occurrence of natural zeolites
• 英文關鍵字： --