阿尔金山库木塔什萨依萤石矿成矿地质特征及控矿因素  

Metallogenic geological characteristics and ore-controlling factors of kumutashisayi fluorite deposit in Altun Mountains

作　　者：伍光锋 魏龙飞[1] 王博[1] 汪振宇 王锦鹏 郗国庆 王畅 Wu Guangfeng;Wei Longfei;Wang Bo;Wang Zhenyu;Wang Jinpeng;Xi Guoqing;Wang Chang(Geology Institute of China Chemical Geology and Mine Bureau,Beijing,100101,China)

机构地区：[1]中化地质矿山总局地质研究院,北京100013

出　　处：《化工矿产地质》2022年第2期137-145,共9页Geology of Chemical Minerals

基　　金：中国地质调查局“新疆若羌县卡尔恰尔一带1∶5万矿产地质调查”(DD20190143)。

摘　　要：库木塔什萨依萤石矿床位于阿尔金造山带,为近年所发现的具有大型找矿潜力的萤石矿床。区内萤石矿含矿建造为阿尔金岩群a岩组黑云斜长片麻岩建造、大理岩和碱长花岗岩建造,控矿、容矿构造为区域性北东向断裂及其次级断裂。萤石矿化主要赋存于萤石方解石脉中,次为构造角砾岩中。矿物成分简单,主要为萤石、方解石,次为石英和云母。萤石矿石和围岩(碱长花岗岩)的稀土地球化学特征显示区内萤石矿脉中主要含钙矿物(萤石、方解石)的成矿物质来源是相同的,且与围岩(碱长花岗岩)的物源具有相似性和继承性。综合研究表明,区内矿床类型为热液充填型萤石矿床,成矿时期较晚奥陶世碱长花岗岩成岩期晚,“阿尔金岩群a岩组黑云斜长片麻岩建造+晚奥陶世碱长花岗岩建造+区域性北东向断裂构造+F化探异常+碳酸岩化”是区内萤石矿的重要控矿因素。Kumutashisayi fluorite deposit discovered in recent years with large prospecting potential is located in Altun orogenic belt.The ore-bearing formations of fluorite deposit in the area are biotite plagioclase gneiss formation and marble of rock group a in Altun group,and alkali feldspar granite formation,and the ore-controlling and hosting structures are regional NE trending faults and their secondary faults.Fluorite mineralization mainly occurs in fluorite calcite veins,followed by tectonic breccia.The mineral composition is simple,mainly fluorite and calcite,secondary to quartz and mica.The REE geochemical characteristics of fluorite ore and surrounding rock(alkali feldspar granite)show that the ore-forming material sources of the main calcium-containing minerals(fluorite and calcite)in the fluorite veins in the area are the same,and have similarity and inheritance with the material sources of surrounding rock(alkali feldspar granite).The comprehensive study shows that the deposit type in the area is hydrothermal filling fluorite deposit.The metallogenic period is later than the late Ordovician alkali feldspar granite formation period."formation a of Altun group,late Ordovician alkali feldspar granite,regional NE trending fault,F geochemical anomaly and carbonatization"is an important ore-controlling factors of fluorite in the area.

关 键 词：热液型萤石矿床 阿尔金山脉 控矿因素 

分 类 号：P619.215[天文地球—矿床学]