常见长石族矿物的显微鉴定

Microscopic Identification of Common Feldspar Minerals

摘要: 长石是主要的造岩矿物，对于地质、资勘等相关专业学生而言，是所需学习的专业知识《矿物学》中重要的部分，然而相关学科书籍对长石矿物的显微描述较为复杂，对于初学者来说，难以理解和熟练掌握长石镜下显微鉴定的方法。本文通过参考大量阐述长石矿物学特征的书籍，进行了整理，详尽地阐述了长石矿物镜下的显微特征，以指导初学者开展显微镜下观察和鉴别长石的学习。试图将长石的显微特征以直接和简便的方式进行描述，指导初学者如何在单偏光和正交偏光的系统下观察长石的具体光性特征。

Abstract: Feldspar is the main rock-forming mineral, and it is an important part of the professional knowledge of “Mineralogy” for students majoring in geology and geological prospecting. However, the microscopic description of feldspar minerals in related books is more complicated. It is difficult for beginners to understand and master the method of microscopic identification under a feldspar microscope. By referring to a large number of books on the mineralogical characteristics of feldspar, this paper collates and expounds the microscopic characteristics of feldspar under a microscope in detail to guide beginners to observe and identify feldspar under a microscope. This paper attempts to describe the microscopic characteristics of feldspar in a direct and simple way to guide beginners on how to observe the specific optical characteristics of feldspar under the system of single polarization and orthogonal polarization.