若羌库木萨依伟晶岩分异演化及锂成矿过程——来自矿物学的约束

Differential Evolution and Lithium Mineralization Process of Kumusayi Pegmatite in Ruoqiang County——Constraints from Mineralogy

研究区位于祁连-昆仑构造带、柴达木陆块和塔里木陆块之间,处于阿尔金山中段。若羌库木萨依花岗伟晶岩型锂多金属矿床的主要矿石矿物为锂辉石,含电气石和铌铁矿族矿物,通过岩石学、矿物学研究,认为库木萨依伟晶岩是花岗质岩浆分异演化的最终产物,显示出含锂白云母等相关矿物是伟晶岩形成过程中反映分异程度的有效指示剂。

The research area is located between the Qilian Kunlun orogenic belt,the Qaidam and Tarim blocks,in the middle section of the Altun Mountains.The main ore mineral of the Kumusayi granite pegmatite type lithium polymetallic deposit in Ruoqiang County is spodumene,containing tourmaline and niobium iron group minerals.After petrological and mineralogical research,it is believed that the Kumusayi pegmatite is the final product of the differentiation and evolution of granite magma,indicating that related minerals such as lithium bearing white mica are effective indicators of the degree of differentiation in the formation process of pegmatite.