福建将乐县常口萤石矿矿床成因初步探讨

Preliminary Study on the Genesis of Changkou Fluorite Deposit in Jiangle County,Fujian Province

常口矿区位于将乐常口—明溪瀚仙—清流余朋北东向萤石成矿带东北部将乐高唐—常口成矿远景区内。通过在区内开展钻探、硐探等勘查工作,对矿床成矿地质背景及控矿因素、矿床成因进行研究,综合分析认为,区内成矿在时间、空间上与北东东向断裂构造及燕山早期岩浆活动关系密切,矿床成因为岩浆期后,经古地热水多次循环淋滤、吸取围岩中的成矿元素,在断裂构造中富集、沉淀形成的中-低温热液充填型矿床。

Changkou mining area is located in Jiangle Gaotang-Changkou metallogenic prospect area of Jiangle Changkou-Mingxi Hanxian-Qingliu Yupeng NE fluorite metallogenic belt northeast.The geological background,ore-controlling factors and genesis of the deposit are studied by drilling and exploration in the area.The comprehensive analysis shows that the metallogenic time and space in the area are closely related to the NEE fault structure and the early Yanshanian magmatic activity.The deposit belongs to a medium-low temperature hydrothermal filling type.The genesis is formed after magmatic period,through repeated circulation leaching by paleo-geothermal water,and the ore-forming elements in the surrounding rock are absorbed,enriched and precipitated in the fault structure.