摘要
光石沟铀矿床是我国典型的花岗伟晶岩型铀矿床,矿体呈透镜状及脉状断续产于壳幔混源黑云母花岗伟品名÷脉中,铀矿物以品质铀矿为主。通过该矿床矿化黑云母花岗伟晶岩及铀矿化特征研究,提出了该矿床形成于加里东期拉张动力环境,成矿岩浆属于温度≥700℃、富铀、含F及CO_2、低氧逸度的岩浆-热液过渡性流体体系,铀以氟羟基络合物形式迁移富集,岩浆-热液体系沸腾、去气作用是晶质铀矿沉淀成矿的主要成矿作用,形成品质铀矿环边的黄铁矿、方解石、铀石等矿物是热液成矿阶段产物的新认识。
Guangshigou uranium deposit is a typical granite pegmatite type uranium deposit in China, the ore body present lenticular and veined shape which produced intermittently in the biotite granite pegmatite originated from crust-mantle mixing, uranium mineral are mainly uraninite. Through the study characteristics of mineralized biotite granite pegmatite and uranium mineralization in the deposit, the new understandings were put forward. The deposit formed in the extensional environment in the Caledonian, and the metallogenic magma belongs to the magmatic-hydrothermal transitional fluid system which is of the temperature over or equal to 700℃, U-rich, containing F and CO2 and low-oxygen fugacity, the uranium was migrating and enriched in the form of fluorine hydroxyl complexes magmatic-hydrothermal system, boiling and degassing are the main cause of uraninite precipitating and metalization, minerals such as the pyrite, calcite and coffinite, around uraninite rim belong to the products of hydrothermal mineralization stage.
出处
《世界核地质科学》
CAS
2015年第4期200-207,共8页
World Nuclear Geoscience
关键词
光石沟铀矿床
含矿主岩
铀矿化特征
Guangshigou uranium deposit
ore-bearing host rock
characteristics of uranium mineralization
