plagioclase

petrographic studies suggest that the mineral assemblage is composed of olivine, clinopyroxene and plagioclase, which is consistent with common mineral assemblage of a characteristic alkali basalt.

岩石学特征表明，南海新生代玄武岩的矿物组合为橄榄石、单斜辉石、斜长石，与特征的碱性玄武岩的矿物组合一致。

The notes describe the common minerals such as quartz and its polymorphs, coesite, tridymite and cristobalite, feldspar, plagioclase, feldspathoids, pyroxenes, amphiboles, etc.

讲稿详细地介绍了火成岩矿物，如：石英及它的同构异形体、柯石英、鳞石英、方石英、长石、斜长石、似长石、辉石、闪石等矿物。

This paper is to investigate the impacts of plagioclase dissolution on reservoir quality, and to assess the quantitative relationships between plagioclase dissolution and porosity in sandstones by discussing the mass balance, image analysis and quantitative statistics of cast thin sections.

从讨论长石溶解的质量平衡问题入手，结合铸体薄片的统计数据和图像分析，全面探讨了长石溶蚀作用对储集层质量的影响，以及长石溶解与砂岩孔隙发育的定量关系。