以岩脈中液包體推論臺灣宜蘭地區岩層的溫度及壓力條件

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Title:	以岩脈中液包體推論臺灣宜蘭地區岩層的溫度及壓力條件 Application the Fluid Inclusion of Vein to Decipher P-T Condition of Formation of Ilan, Taiwan
Authors:	劉佳玫
Contributors:	地質學系
Date:	2014-08
Issue Date:	2014-08-07 10:08:53 (UTC+8)
Abstract:	壓力-溫度-時間路徑(P-T-t path)是了解一個地區岩層、構造演化三個重要的參數。然而，分析液包體則能獲得這三個重要參數其中的兩項，分別為壓力和溫度。其中溫度資料的獲得是利用液包體的均化溫度(homogenization temperature)和融化溫度(melting temperature)。然而，液包體中壓力的估算，一般而言可採用兩種方式，一種利用液包體的均化溫度與鹽度或特徵礦物的產生，配合上以拉曼光譜儀量測液包體的化學成份得知液包體的組成，藉由相圖即可估算熱液流體的壓力。另一種方式為，利用拉曼光譜儀分析液包體中的化學組成成份，藉由這些成份的位移量(shift)來推估液包體的壓力。本研究計畫將針對宜蘭地區雪山山脈和中央山脈板岩帶的岩層中之岩脈(vein)的液包體進行分析研究工作，研究工作的內容包括野外調查岩脈和岩層的截切關係及岩脈之間的關係，予以判斷不同岩脈和岩層之間的形成先後關係；再者，於室內分析不同岩脈和岩層之間的位態分布及以光學顯微鏡觀察岩脈的種類；最後，利用顯微測溫儀器量測岩脈中各種液包體的溫度和推算鹽度，並利用拉曼光譜儀量測岩脈中各種液包體的成份和估算其壓力。綜合這些結果予以推論宜蘭地區岩層之溫度及壓力條件。 The P-T-t path is important factors that understand formation and structure evolution of an area. The fluid inclusion can provide the pressure and temperature factors. The temperature of fluid inclusion is gained by homogenization of fluid inclusion. The other factor is the pressure of fluid inclusion that is calculated by salinity of fluid inclusion and the shift of Raman spectrum. Therefore, this study aims to analyze the fluid inclusion of vein of formation in the Hsuehshan Range Belt and Central Range Slate Belt. The first one is to survey the relationship between the formation and veins. The second aspect is to analyze the attitude of formation and veins, and the vein types. The third is to estimate the temperature of fluid inclusion by micro-heating stage and calculate the pressure of fluid inclusion by Raman spectrum.
Appears in Collections:	[Department of Geology] project

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