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某地石英脉型铍矿床,经过勘探工作证实,具有一定的经济价值.其矿床成因应属于气成——热液型的铍矿床.一、矿床地质特征概述本区位于古生代褶皱带的南缘,南部与沉降带相接,沿其接触带,因受构造断裂影响,有花岗岩、花岗闪长岩呈岩基状侵入,南与古老片麻岩接触,北和侏罗系火山碎屑岩、安山岩、凝灰岩、玄武岩及砂岩毗连.在花岗岩体内螢石矿脉屡见不鲜.区城内的花岗岩岩基,呈岩枝侵入于安山岩中,
The quartz vein type beryllium deposit in a certain place has been proved to have certain economic value by exploration work.The genesis of the deposit belongs to beryllium-hydrothermal type beryllium deposit I.General characteristics of ore deposit The area is located in the southern margin of the Paleozoic fold belt , And the southern part is connected with the subsidence belt. Along the contact belt, due to the tectonic fracture, granite and granodiorite are invaded by the rock basement, the south is in contact with the ancient gneiss, and the North and Jurassic volcaniclastic rocks , Andesite, tuff, basalt and sandstone contiguous in the granite body fluorite veins are common.Granular granite rock, rock intrusion in the andesite,