分离出重砂,轻砂往往被抛弃,实为可惜。为了获得更多的有用数据,可将轻砂用加拿大树胶胶结制成薄片,采用石油部门常用的染色法,将长石碎屑染色:滴几滴氢氟酸,酸与长石反应后形成一层氟硅酸铝薄膜,约二分钟,用水冲洗,将薄片浸于亚甲基兰溶液中,约五分钟,再冲洗、烘干,这时,石英表面无污染,而长石染上了兰色:钙长石为深兰,钙质长石为浅兰,正长石和微斜长石为淡兰。染色后加上盖片,置于偏光镜下,鉴定所有的碎屑矿物。在偏光镜下,将石英、岩屑、长石、片状矿物等定性、定量,并观察矿物的标形特征;由于长石染了色,缩短了鉴定时间。因为在处理重砂样品过程中,已对碎屑颗粒分了 Separation of heavy sand, light sand is often abandoned, it is a pity. In order to obtain more useful data, the light sand can be made into a thin sheet made of Canadian gum, stained with feldspar chippings using the staining method commonly used in the oil sector: a few drops of hydrofluoric acid, the reaction of acid and feldspar to form a Layer aluminum fluorosilicate film, about two minutes, rinsed with water, the sheet immersed in methylene blue solution for about five minutes, and then washed and dried, then the quartz surface without pollution, and feldspar stained with blue Color: Calcareous feldspar is deep blue, calcareous feldspar is light blue, orthoclase and slightly plagioclase are light blue. After staining, add a cover sheet and place under a polarizer to identify all the detrital minerals. Under the polarizer, the quartz, cuttings, feldspar, flaky mineral qualitative and quantitative, and observation of the mineral characteristics of the mark; feldspar stained, shortening the identification of time. Because in the process of processing heavy sand samples, the debris particles have been divided