【摘要】 横涧-岗上英铀矿床产在相山大型塌陷式火山盆地的北部,区域NE向、EW向断裂构造与火山构造复合控制次花岗斑岩体和铀矿床的定位,矿区次花岗斑岩的产出明显受到高角度逆断层的制约,铀矿化主要受构造裂隙控制,含矿裂隙带沿斑岩体内外接触带呈弧形展布。依据横涧-岗上英地区次花岗斑岩岩体及矿体空间展布及产状特征,厘定了控岩构造系统,通过分析构造裂隙特征及其与铀矿化的关系,划分了成矿前、成矿期、成矿后构造体系,初步认为矿区的构造演化可分为三期6个阶段。更多还原

【Abstract】 The Hengjian-Gangshanying deposits are located in the north of Xiangshan collapse volcanic basin.Regionally the NE and EW striking faults and volcanic faults jointly exert control on the position of subgranitic porphyry and uranium deposits.Locations of subgranitic porphyry are obviously confined by high-angle thrusts,and uranium mineralization is primarily controlled by fissures.The ore-bearing fissures display an arch extension along inner and outer contact zones of the porphyry.Based on spatial distribution and attitude of subgranitic porphyry in the Hengjiang-Gangshangying area,this paper has defined the system of rock-controlled structures.By analyzing the relationship between structural fissures and uranium mineralization,the authors have divided the structure system into pre-ore stage,ore stage and post-ore stage,and believed that the structures experienced 3 epoches with 6 stages.更多还原