| 摘要: |
| 用激光拉曼探针分析了冲绳海槽南部橄榄拉斑玄武岩中的流体包裹体成分。结果表明,流体包裹体的主要成分为CO2,此外,还有H2O、H2S、CH4、N2、C2H2、C2H4、C3H8组分。不同宿主矿物,其包裹体成分中CO2、H2O和CH4的相对含量也不同,其中,钙长石中包裹体的CO2含量最高,贵橄榄石中的次之,普通辉石中的最少。CH4和H2O的含量趋势与CO2相反。根据这3种宿主矿物中流体成分及其含量变化特点,推断这3种宿主矿物的结晶顺序为钙长石、贵橄榄石、普通辉石,并认为流体包裹体中的烃类和水可能主要来自熔体上升过程中所接触的沉积地层。
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| 关键词: 玄武岩,冲绳海槽,流体包裹体,激光拉曼光谱 |
| DOI：10.11693/hyhz200201007007 |
| 分类号: |
| 基金项目:国家“973”计划资助项目,G20000046703-02号;国家海洋局海底科学实验室资助项目,9804号。 |
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| COMPONENTS OF FLUID INCLUSIONS OF BASALT FROM THE SOUTHERN OKINAWA TROUGH AND THEIR IMPLICATIONS |
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HAN Xi-Qiu1, MA Wei-Lin2, JIN Xiang-Long2, YANG Shu-Feng1, GAO Jin-Yao2
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1.The Earth Science Department,Zhejiang University;2.Key Lab of Submarine Geoscience of State Oceanic Administration,Second Institute of Oceanography, State Oceanic Administration
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| Abstract: |
| The components of fluid inclusions in tholeiite collected from the southern Okinawa Trough are analyzed by Laser Raman Spectroscopy.The main components of fluid inclusions are CO2, H2O, H2S, CH4, N2, C2H2, C2H4 and C3H8. In different host minerals, the contents of CO2, H2O and CH4 are different.The CO2content is the highest in anorthite, while that in crysolite is in the next place and that in augite is the least.However, the content trend of CH4and H2O is on the opposite.According to the fluid components and their contents in the studied host minerals,it is inferred that the crystallization order of the studied host minerals are anorthite, crysolite and then augite.It is also concluded that the hydrocarbon and water maybe primarily came from sedimentary strata when lava is arising.
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| Key words: Basalts, Okinawa Trough, Fluid inclusions, Laser Raman Spectroscopy |
