榴辉岩中绿辉石的测定方法研究

通过对某地榴辉岩中伴生的有用矿物的纯矿物物质组成的研究，发现Ｎａ可作为其中绿辉石的特征性成分，且Ｎａ２Ｏ含量与其纯度呈正相关。因此，推荐用测定Ｎａ２Ｏ量并以求得的换算系数计算榴辉岩中绿辉石含量的化学物相分析方法。经合成样品验证，方法的相对误差＜１．７％，用于生产样品分析，所得结果的重现性好，平均偏差＜０．５％。

Study on Determination of Omphacite in Eclogite

It is discovered that sodium can be used as a characteristic component of omphacite in the eclogite and Na 2O content is in proportion to the purity of omphacite. So a chemical phase analysis method based on determining Na 2O and calculating the conversion coefficient to obtain the omphacite content in eclogite was proposed. The method has been applied to sample analysis with satisfactory results.