摘要
为了查明麻粒岩相变质高峰期的流体特征 ,对研究区太古宙孔兹岩系变质峰期特征矿物夕线石中具负晶形的碳质液相包裹体进行了冷热台显微测温和激光拉曼光谱成分测定。研究表明 ,该类包裹体xH2 O很低 (0mol%～ 17mol% ) ,碳质成分很高 (xCO2 +CH4=70mol %～ 90mol% ) ,密度为0 .94～ 1.0g/cm3 ,相应压力约为 0 .7GPa。流体氧逸度的lg fO2 在 - 14～ - 16之间。研究结果表明 ,丰富的碳质组分不是深部来源的 ,而可能是由孔兹岩系原岩中有机质氧化作用产生。
For the purpose to demonstrate the nature of fluid during peak metamorphism of the Archean Khondalite series,this paper focus on the carbonic liquid inclusions with negative crystal form within diagnostic mineral-sillimanite of the Archean Kondalite series in the studied regeon.According to the data obtained from micro-thermometer and laser Raman microprobe,the fluid inclusions of this kind are characterized by low x H 2O (0 mol%～17 mol%),very high carbonic materials ( x CO 2+CH 4 =70 mol%～90 mol%), with density 0.94～1.0 g/cm 3 corresponding to pressure about 0.7 GPa. And the fugacity of oxygen (lg f O 2 ) is between -14 and -16. Above evidences show that the abundant carbonic material are not derived from deep source, but probably generated by oxidation of organic material in protolith of the Khondalite series.
出处
《长春科技大学学报》
CAS
CSCD
北大核心
2001年第2期122-125,共4页
Journal of Changchun University of Science and Technology
基金
国家自然科学基金!资助项目 (49772 144 )
