熔融包裹体中水含量的测定方法

本文在对Ｎａｕｍｏｖ（１９７９）计算熔融包裹体中水含量计算模式作原则性修正的基础上建立了新的计算模式，其特点是充分考虑了熔体被捕获后在漫长地质时期内经历的各种变化对其中水含量计算精度的影响。通过加热使熔融包裹体均一，并在均一化过程中的每一个相变发生前后分别测量各相的相对体积百分比，可从本质上消除Ｎａｕｍｏｖ计算模式未曾考虑过的对水含量计算精度发生影响的因素，因此可较为准确地获得熔融包裹体中的水含量。计算实例表明，烙融包裹体中的水含量与其均一温度负相关，随均一温度的降低含水量增高。

A METHOD TO DETERMINE WATER CONTENT IN MELT INCLUSION

It is the only direct way to know water content in magma by measure CH2o In melt Inclusion (MI ). This study give a new way to determine CH2o in MI by the following formula:In any case if in MI exist crystal muscovite, the CH2o should be calculated by another formula as following:Where V0 represent the volume of muscovite ,VL is the volume of liquid phase, V., the volume of gas phase, V,, the volume of melt imclusin . n represent the volume ratio of MI from home temperature to homogeneous temperature, k the volume ratio of MI from liquid-homogeneous temperature to homogeneous temperature, and F=VL/(nVL kVG).