摘要
本文首次系统总结了钾交代型铀矿床的标型矿物——犬牙状微斜长石的五项标型特征。它们是:色深、浑浊;晶体由几组平行双面组成的似菱柱体聚形、鱼鳞状,叠瓦状集合体;三斜对称,T_(10)位铝含量高达0.91％;高钾、低钠、含铀和富铁;较小的折光率和比重。同时,建立了与标型特征相对应的矿床形成的地质地球化学条件。
Described for the first time in this paper the hackly microcline, aa typomorphic mineral in potash metasomatic uranium deposits. Five typomor-phic features of the microcline have been recognized as follows: (1) turbidand dark coloured; (2)unique in crystal form;(3)high in ordering(T_(10)=0.91);(4) high in K but low in Na and rich in Fe; and (5) lower specific gravityand refractive index than those of the standard. These typomorphic featuresindicate that the hackly microcline was formed in a particular geologicalenvironment. Its forming conditions are also studied in this paper.
出处
《矿物学报》
CAS
CSCD
北大核心
1989年第1期60-64,共5页
Acta Mineralogica Sinica
关键词
微斜长石
铀矿床
标型矿物
microcline
uranium deposit
typomorphic mineral
granite
