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石英、长石碎屑在浅海沉积物中的含量可达40～90％,研究它们对于阐明物质来源和搬动过程有重要意义。这些矿物数量多,同质多像系列复杂,类质同像置换广泛,选择一个准确而又简便的鉴定方法是进行研究的前提。经常使用的常规岩石学方法主要有:薄片法、油浸法及染色法。油浸法可以用来区别石英、钾长石及部分斜长石,但沉积物中的长石颗粒往往风化剧烈而使折光率发生改变,影响鉴定的精度。同时,更长石以上的斜长石(An>10％)与石英的折光率重叠,就更增加了工作的困难。相比之下,染色法是一种简便而又迅速的鉴
Quartz, feldspar debris in the shallow sea sediments up to 40 ~ 90%, the study of them to clarify the source of material and moving process is of great significance. The number of these minerals, the homogeneity is more complex than that of the series, and the isomorphism is widely replaced. It is a prerequisite for the research to choose an accurate and simple identification method. Commonly used conventional rock method are: flake method, oil immersion method and dyeing method. Oil immersion method can be used to distinguish between quartz, potash feldspar and some plagioclase, but the feldspar sediments tend to weathering violent changes in refractive index, affecting the accuracy of identification. At the same time, the plagioclase (An> 10%) above the feldspar overlaps with the refractive index of quartz, further adding to the difficulty of work. In contrast, staining is a quick and easy guide