【摘要】 本文研究了横断山区不同成因类型花岗岩中角闪石的化学成分、微量元素、稀土元素、晶胞参数和物理性质等特征。按化学成分对角闪石作了晶体化学成因分类。在三种不同成因类型角闪石中,其M值[M=Mg/(Mg+Fe²⁺)]各不相同;幔型M>0.7,壳幔型M=0.7—0.5,壳型M<0.5。更多还原

【Abstract】 The chemical compositions, trace elements,REE,unit cell parameters and physical properties of hornblendes from different genetic types of granite in the Hengduanshan Region have been studied in this paper. Based on their chemical compositions,the crystallochemical genetic classification of hornblendes has been established.Their M values [M=Mg/(Mg+Fe²⁺]are ariable for the three different genetic types of hornblende: 0.7 for the mantle type,0.5—0.7 for the crust-mantle type,and 0.5 for the crust type.Each Of the types is distinct in trace element,REE,unit cell parameter,DTA and refractive index.Therefore, these peculiarities of hornblende can be used as the criteria to distinguish different genetic types of granite.更多还原