摘要
双江口萤石矿床成因为中温热液型。该区萤石中包裹体(即成矿时溶液)pH值呈中性,Eh为70±,即相对氧化位势不太高的条件下,才能形成富矿、大矿。CO_2、CH_4的高含量是萤石矿床的形成和富集的良好矿化剂,即含量愈高则品位愈富厚度愈大。
The Shuangjiangkuo-Jiangjunmiao fluorite ore deposit occurs in early Yenshanian granites in the fold system of south China. The average homogenization temperature flnorite is 250℃. The contents of CO_2 and CH_4 in the inclusions tend to increase from southeast to northwest as well as in the vertical direction. Liquids in the inclusions are composed mainly of CaO, F and Cl with minor SO_4^(2-). All this has contributed a lot to the formation and concentration of fluorite as well as to wall-rock alteration. This ore deposit is evidenced to be of mesothermal origin.
出处
《地球化学》
CAS
1987年第3期274-279,共6页
Geochimica
