摘要
二十一站-宝兴沟位于上黑龙江断陷盆地的东南部,近年来相继发现了宝兴沟大型岩金矿床,十五里桥中型岩金矿床以及二十一站小型铜金矿床。为提高找矿理论水平,进一步在该区找矿,本次对该区矿床的地质特征及时空分布规律进行了研究。通过研究表明,矿床除受NE向断裂构造控制外,岩浆岩、地层对矿床也有一定的控制作用。在二十一站断陷内的二十二站组地层中,沿着NW向、EW向与NE向断裂构造交汇部位发生成矿作用,形成了一个"火山岩-断裂构造-侵入岩-地层"为一体的浅成低温热液成矿系统。系统内具有多处与已知矿床相似的成矿地质条件,且有Au、Ag、Cu化探异常存在,具备形成大型浅成低温热液型金及多金属矿床的潜力。
Ershiyizhan and Baoxinggou locate in the southeast of upper Heilongjiang subsidence. Baoxinggou large gold deposit, Shiwuliqiao medium gold deposit and Ershiyizhan small copper-gold deposit have been found in recent years. In order to improve the prospecting level and luther prospecting, we have carried out the research on the geological environment features, and time and spac distribution in this area. It suggests that the deposits are not only controlled by NE-striking faults, but also controlled by igneous rocks, and strata. In Mesozoic NNE-striking volcanic belt overlapped on the upper Heilongjiang subsidence. The shallow intermediate and acidic intrusive bodies were formed along with NE-striking, NNE-striking and NW- striking faults in clastic rocks. Metallogenesis took place in the intersection area of NE-stiking, NW- stiking and EW- stiking faults in the Ershierzhan Formation of Ershiyizhan subsidence. It formed a volcanic rock - fracture structure - intrusive body - strata system. In this system Ershiyizhan and Baoxinggou gold deposits were formed as epithermal deposits. In the system with gold, silver and copper geochemical anomalies, there are many potential places to form large shallow epithermal gold and polymetallic deposits.
出处
《甘肃冶金》
2013年第3期62-65,共4页
Gansu Metallurgy
基金
武警黄金指挥部项目"黑龙江右岸岩金矿床成矿地质条件
成矿规律及找矿方向"(2009-03-07)
关键词
浅成低温热液型矿床
二十一站金矿床
宝兴沟金矿床
黑龙江
shallow epithermal gold deposit
Ershiyizhan gold deposit
Baoxinggou gold deposit
Heilongjiang
