北淮阳盆岭带的构造演化与铀成矿

北淮阳盆岭构造带是大别造山带的重要组成部分。佛子岭岩群代表了早古生代扬子地块北缘大别古岛弧弧前海盆的火山沉积建造，在加里东运动陆块对接过程中变形变质。石炭系梅山群具磨拉石建造特征。在华力西印支期陆内俯冲褶皱带的基础上，燕山期沿桐柏桐城断裂伸展北移，近东西向断陷盆地发育，形成盆岭构造景观。南侧大别山强烈隆升，铸就了现今大别山变质核杂岩构造格局。中生代岩浆活动是区内重要铀源，具有成矿潜力的地质体是响洪甸正长岩体和北带粗面质火山碎屑岩

REGIONAL TECTONIC EVOLUTION AND URANIUM MINERALIZATION OF THE BEIHUAIYANG BASIN AND RANGE STRUCTURAL BELT

Beihuaiyang basin and range structural belt is an important part of Dabie orogenic belt.Fuziling Rock Group represented Caledonian cycle of fore arc sea basin volcanic sedimentary formation.It underwent deformation and metamorphism during the convergence of the north and south massifs in Caledonian Movement.The Meishan group of Carboniferous system has the nature of molasse formation.On the base of Variscan indosinian fold belt of intracontinental subduction,crustal extensional tectonic movement took place along Tongbai tongcheng fault in Yanshan age,thus,fault basin developed nearly east to west,forming the basin and range structural landscape.Dabieshan mountain uplifted rapidly,the present structural framework of Dabie metamorphic core complex was formed.The Mesozoic magmatic rocks is the important uranium source in this region.The alkali granite in Xianghongdian and Jurassic trachytic pyroclastic rock of the north belt have uranium mineralization potentiality.