脉状金矿定位预测的关键——主控矿因素分析

The Key to the Site Prediction of the Gold Lodes—Analysis on Major Ore Constraints

华北地台3个脉状金矿矿床（体）定位预测的实例说明,主控矿因素在矿床（体）定位预测过程中起到关键作用——“战略”指向作用。内蒙古赤峰热水金矿的主控矿因素为宽缓闪长玢岩脉,其上方约100-300 m范围内为工业矿脉集中产出的部位,控制了主要矿脉群和工业矿体的空间分布。山东招远界河金矿的主控矿因素为位于郭家岭花岗闪长岩岩体与玲珑花岗岩体外接触带附近的断裂交汇部位（构造结环）。山东平度旧店金矿的主控矿因素则为北西向硅化带,主要的含矿石英脉均分布于其两侧约2 km范围以内。确定主控矿因素是矿床定位预测最重要的任务之一,矿山资料二次开发、详尽的矿床地质研究以及物化探资料的综合利用是确定主控矿因素的主要手段。

Take the site prediction of three gold lode deposits as examples,the authors try to show the key role of major ore constraints in site prediction-strategic directing.The major constraint of the Reshui Gold Deposit in Chifeng,Inner Mongolia is a gently dipping dioritic porphyrite,which controlled the distribution of the gold lodes in the deposit and 100-300 m distance over the hanging wall of the dioritic porphyrite is the best site for gold mineralization.The merging sites of three major faults near the contacts between the Linglong granite intrusion and the Guojialing granodiorite intrusion controlled the ore bodies in the Jiehe gold deposit,Zhaoyuan,Shandong Province.The major ore constraint of the Jiudian gold deposit,Pingdu,Shandong Province is a NW trending silicified fault zone and all the auriferous quartz veins at both the footwall and hanging wall of the fault zone are within a range of 2 km.To determine the major ore constraints of gold deposits is significant to site prediction of gold lode deposits and needs detailed examination of mine data,exhausted geological study of the mine and comprehensive exploitation of geochemical and geophysical data.