浙江青田县万山萤石矿矿床地质特征及成因

Geological properties and genesis of Wanshan fluorite deposit in Qingtian of Zhejiang

浙江青田县万山萤石矿成矿作用主要由地热水浅循环伴含氟成矿流体,在特定的物理化学条件下,沿有利的构造空间富集成矿,属低温热液充填型脉状矿床。矿体矿石、矿物组分比较简单,矿石矿物为萤石,脉石矿物以石英为主,次为蛋白石、高岭石、黄铁矿、方解石、绿泥石等。矿石主要化学成分为CaF2和SiO2,矿石中SiO2、CaF2二者总量约占97%～99%。随着CaF含量的增加,SiO含量减少。

The mineralization of Wanshan fluorite deposit was mainly geothermal water with fluorine-containing ore-forming fluids of shallow circulation, enriched along the favorable strueture space in particular physical and chemical conditions and belonged to veined deposit of low temperature hydrothermal fluid filling type. The mineral eomponents of the ore body were relatively simple, the ore mineral was fluorite and gangue minerals were dominated by quartz, seeondary opal, kaolinite, pyrite, calcite, and chlorite and so on. Main ehemical components of the ore were CaF2 and SiO2, both SiO2 and CaF2in the ore aggregates accounted for about 97%-99%. Along with the inerease of CaF2 content, SiO2 content decreased, the two mutual grew and declined.