【摘要】 本文研究了横断山区不同成因类型花岗岩类岩石中黑云母的化学成分、微量元素、结构和物理性质等。结合花岗岩类岩石的成因类型,将黑云母分为三个亚种:富镁黑云母(MF=1.3—1.5)、镁黑云母(MF=1—1.3)和富铁黑云母(MF=0.5-1)。更多还原

【Abstract】 The chemical compositions, trace elements, structures and physical prope-rties of biotites from different genetic types of granite in the HengduanshanRegion have been studied in this paper. Based on their chemical compositions,these biotites can be divided into three subspecies: magnesium-rich biotite (MF=1. 3-1. 5), magnesio-biotite (MF=1. 0-1. 3), and iron-rich biotite(MF=0. 5-1. 0). Each of them has its own features and is closely related to the originof the granites. Therefore, biotite is one of the most useful typomorphicminerals for the different genetic types of granite.更多还原