研究生: |
郭瑞家 Kuo Ray-jar |
---|---|
論文名稱: |
澎湖橄欖岩在壓力高至二京帕之實驗岩石學研究 Melting experiment of a peridotite from Penghu area, at pressures up to 2 GPa |
指導教授: | 劉德慶 |
學位類別: |
碩士 Master |
系所名稱: |
地球科學系 Department of Earth Sciences |
論文出版年: | 2000 |
畢業學年度: | 88 |
語文別: | 中文 |
論文頁數: | 58 |
中文關鍵詞: | 澎湖 、橄欖岩 、實驗岩石學 、高壓實驗 、矽質玄武岩 、部分熔融 |
英文關鍵詞: | Penghu, peridotite, melting experiment, high pressure experiment, tholeiite, partial melt |
論文種類: | 學術論文 |
相關次數: | 點閱:294 下載:9 |
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澎湖群島玄武岩可分為矽質玄武岩與鹼性玄武岩二類,其中在鹼性玄武岩中常發現超基性擄獲岩。本實驗之橄欖岩採自澎湖本島東北角的北寮地區,希望藉由超基性捕獲岩於不同溫壓環境下之實驗,由電子微探儀分析所生成之岩漿,期能對澎湖玄武岩之成因有所了解。
在各壓力下,隨著溫度上升,實驗生成之岩漿Al2O3、CaO、Na2O、K2O含量呈現減少之趨勢,而MgO含量呈現增加之趨勢
固相線附近實驗生成之熔融物質CaO含量、FeO/MgO及Mg#較澎湖玄武岩為高,顯示澎湖矽質玄武岩於生成之過程中,應經歷結晶分化之過程。
澎湖北寮橄欖岩之實驗結果:0.5GPa下生成石英矽質玄武岩,1GPa下生成橄欖石矽質玄武岩,1.5 GPa下生成更富含橄欖石端元之橄欖石矽質玄武岩。
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