吉林集安市兴农铅锌矿成矿地质特征及找矿方向

Geological Characteristics and Prospecting Directions of the Xingnong Lead-zinc Deposit in Ji’an city,Jilin Province

集安市兴农铅锌矿位于鸭绿江多金属成矿带南西部,区内构造发育,岩浆岩广布,成矿地质条件十分优越。平行于鸭绿江大断裂的次一级北东向断裂是主要控矿构造,它既是导矿构造,又是容矿构造,区内两条构造带伴随着含矿热液的活动被石英脉充填,并在有利位置富集成矿。目前地表已发现5条铅锌矿体,深部探获4条铅锌盲矿体和1条金盲矿体,矿体呈脉状产出,具尖灭再现、膨大收缩特征明显。根据区域成矿规律、控矿地质条件及隐伏矿体的发现,证实该区具备中深部、周边部及多金属的找矿潜力,展示出了良好的找矿前景。

The Xingnong lead-zinc deposit in Ji’an city lies in the southwest of the Yalu River polymetallic mineralization belt.The geological conditions of this area are favorable for metallgenesis due to its well developed structure and widespread igneous rocks.The NE trending fault parallel to the Yalu River is the main ore-controlling structure which dictates and hosts ores.The two structural alteration zones are filled with quartz veins due to activity of thermal liquids where ore concentration occurred in favorable positions.Till now,five Pb-Zn ore bodies on the surface,and four hidden Pb-Zn bodies and one hidden Au body at depth have been found.These ore bodies are present in veins,with obvious characteristics of thinning out and reappearing,and lateral change.Based on regional metallogenic regularities,ore-controlling geological conditions and the ore bodies discovered at depth discovered,it is confirmed that this area has a good prospecting potential of multiple metals at depth and on periphery.