摘要
对矿物流体包裹体进行分析的结果表明 ,牦牛坪稀土矿床的矿物中存在 4种类型包裹体 :(1)液 -气相 ;(2 )液 -气 -固相 ;(3)纯气相 ;(4 )固相。矿物包裹体显微测温结果显示牦牛坪矿床成矿温度从 42 3℃至 12 2℃ ;成矿流体的盐度 w(Na Cl)为 11.46 %～14.36 %质量分数。包裹体的成分分析结果显示流体中富含 CO2 和其他挥发性组分 ,并富含大量的不同成分的矿物雏晶。根据矿床地质特征和矿物包裹体的研究结果 ,作者认为本矿床的成矿作用是由碳酸岩岩浆气液流体的沸腾、充填和交代过程而实现的。
On the basis of the petrographic study, four types of inclusions in the minerals of the Maoniuping REE deposit,(1) liquid vapor; (2) liquid vapor solid; (3) vapor; and (4) solid,are recognized. The results obtained from fluid inclusion microthermometry show that the metallogenetic temperatures range from >423℃ to 122℃ for the deposit, and the salinities of the fluid, from 11.46% to 14.36% NaCl equivalent. The fluid inclusion composition analyses with microprobe and gas chromatograph technology indicate that the fluid is rich in CO 2 and other volatile components, and contains abundant solids (crystallites). Based on the ore geology and the fluid inclusion studies, it delineates the fluid boiling, and it concludes that the REE deposit is derived from the boiling, filling and metasomatism of the residual fluid from the carbontite magma.
出处
《矿物岩石》
CAS
CSCD
北大核心
2001年第2期26-33,共8页
Mineralogy and Petrology
基金
国家留学基金委员会资助 (项目编号 :99118)
