熔-流包裹体的特征及成因

CHARACTERISTICS AND ORIGIN OF MELTFLUID INCLUSIONS

针对目前熔—流包裹体研究中对其成因性质重视不够的现象，指出在使用这一术语时，首先应以其成因性质为原则；认为只有那种在硅酸盐熔体与Ｈ２Ｏ（ＣＯ２）流体不混溶体系中，同时捕获硅酸盐熔体相与流体相的那些异常包裹体才适于称作熔—流包裹体；至于那种仅捕获了硅酸盐熔体相，由于圈闭后发生演化，从中分异出流体相的包裹体是一种正常熔融包裹体，不宜将其与异常熔—流包裹体同归一类；并以尖峰岭似伟晶岩黄玉中的熔—流包裹体为例，说明其主要特征。

There exists a mixup in the terminology of “meltfluid inclusion”In this paper the authors discuss the connotation of meltfluid inclusions and demarcate that only the anomalous inclusions which simultaneously captured the silica melt and fluids(H2O,CO2 etc.)in a immiscible meltfluid system may be called “meltfluid inclusion”;and those should be called melt inclusions which consist presently of silica melt and fluids but only a melt phase was captured during the inclusions were trapped.Taking the inclusions in topaz from the Jianfengling pegmatoid for an example,the authors describe in this paper the characteristics of the meltfluid inclusions.