Application of X-Ray Powder Diffraction Method in Identification and Classification of Slate
详细信息
- 责任者：Xiao Gang (Shenyang Institute of Geology and Mineral Resources ; Shenyang 110032 ; China) ; Chi Guangcheng
- 刊名：Geological Survey and Research
- 出版年：2013
- 卷期：36(1)
- 页码：p.76-80
- issnNo：ISSN1672-4135
- isbnNo：CN12-1353/P
摘要
Previously,the slate identification and classification was based primarily on microscope observation of the rock structures and mineral composition.But under the microscope,it is very difficult to distinguish the species of small psammitic minerals,carbonate minerals and clay mineral.So the slate classification only through the microscopic identification technology could produce a lot of errors,which brought great difficulties in the geological mapping and protolith restoration.During the classification and slate naming,we use the X-ray powder diffraction method to verify.By contrast flake indentification to X-ray powder diffraction of 22 slate samples,it is found that X-ray powder diffraction can not only accurately identify fine detritus distinguish between quartz and feldspar and carbonate mineral species under a microscope,but also detect mica,chlorite,montmorillonite and kaolinite scaly minerals.So the detection rate of mineral components is significantly higher than that observed with a microscope.It is proved that the combination of the microscopic identification technology with X-ray powder diffraction method can accurately identify the type of slate.