四川长征铷铍矿地质特征及成矿规律分析

Geological characteristics and metallogenic regularity of rubidium-beryllium deposit in Changzheng, Sichuan

矿区地处巴颜喀拉地块雅江残余盆地,区域上主要为一套三叠系西康群砂泥质地层。在印支晚期,区域上处于挤压、碰撞的造山环境,岩浆活动强烈,生成了一系列中酸性岩体。在长征地区形成热穹隆,印支晚期的二长花岗沿的侵入和晚期的含稀有金属的残余岩浆的就位,形成了稀有金属伟晶岩矿床。系统的研究了四川长征铷铍矿的区域地质概况、地质特征、矿体特征,矿床为伟晶岩型矿床,铷铍矿的分布受构造和岩浆活动控制。长征穹窿较甲基卡穹窿剥蚀较浅,矿区内伟晶岩发育,资源潜力较大。

The mining area is located in the Yajiang residual basin of the Bayan Hara Block,and is mainly composed of a set of Sandy and argillaceous strata of the Triassic Xikang Group.In the late Indosinian period,the region was in a compressive and collisional orogenic environment,and the magmatic activity was intense,resulting in a series of intermediate-acid rock bodies.Thermal domes were formed in Changzheng area,the intrusion of monzonitic granite in late Indosinian and the emplacement of residual magma containing rare metals in late Indosinian formed rare metal pegmatite deposits.The regional geological survey,geological characteristics and orebody characteristics of the Changzheng rubidium-beryllium deposit in Sichuan Province are systematically studied.The deposit is a pegmatite type deposit.The distribution of rubidium-beryllium deposit is controlled by tectonic and magmatic activities.The denudation of the Changzheng dome is shallower than that of the methyl carat dome.Pegmatite is well developed in the mining area and has a great potential for resources.