江西省相山矿田横涧-岗上英矿床构造控矿特征分析

STRUCTURAL CONTROL OVER THE ORE IN HENGJIAN-GANGSHANGYING DEPOSITS IN XIANGSHAN ORE FIELD,JIANGXI PROVINCE

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。

The Hengjian-Gangshanying deposits are located in the north of Xiangshan collapse volcanic basin. Regionally the NE and EW subgranitic porphyry and uranium high-angle thrusts, and uranium fissures display an arch extension distribution and attitude of s striking faults and volcanic faults jointly exert control on the position of deposits. Locations of s tic porphyry are obviously confined by mineralization is primarily controlled by fissures. The ore-bearing along inner and outer contact zones of the porphyry. Based on spatial tic 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.