胶东邓格庄金矿床深部成矿特征及找矿方法组合

牟乳成矿带是胶东地区重要的金成矿带之一，近年来其深部找矿取得了较好效果。在分析总结邓格庄深部金矿床地质特征、矿体空间分布及围岩蚀变特征的基础上，提出了深部找矿方法，分析了深部找矿潜力。邓格庄金矿床为产于侏罗纪玲珑型花岗岩中的大型金矿，深部主矿体赋存标高为-350～-733 m，矿体受金牛山主断裂西侧分支断裂的控制。分析认为，NNE向与NE向断裂交会部位、断裂走向转折部位及倾角由陡变缓的部位是成矿有利地段。研究提出，结合阶梯式成矿模式理论，可控源大地音频电磁测深、井中激电测量、EH4系统、构造叠加晕测量和钻探验证等是开展深部找矿的有效方法组合。进一步指出，邓格庄金矿具有良好的深部找矿前景，Ⅱ-1号矿体深部54~86勘探线和Ⅲ-6号矿体深部62~110勘探线2个区域为深部找矿的有利靶区。

Deep Metallogenic Characteristics of Denggezhuang Gold Deposit in Jiaodong and Its Prospecting Method Combinations

As one of the most important gold metallogenic belts in Jiaodong region，the deep prospecting in Muping-Rushan metallogenic belt has got good results in recent years.Based on the characteristics of geology and spatial distribution of orebodies，the wall rock alterations in depth of Denggezhuang gold deposit，this study presents deep prospecting method and gives potential evaluation.Denggezhuang gold deposit is a large gold deposit，which hosts in Linglong type granites of Jurassic.The deep main orebody occurs in the elevation of -350 to -733 m，and it is controlled by the branch faults on the west of Jinniushan main fault.The mineralization favorable area should be the cross points of the NNE-striking and NE-striking faults，the turning point of the strike of faults and the location where the dip is slowed by steepness.The combination of effective methods for deep prospecting is step metallogenic model，CSAMT，borehole induced polarization measurement，EH4 system and comprehensive studies for the tectonics and geochemical halo.The combination of previous methods indicates that Muping-Rushan metallogenic belt has a good prospect of deep prospecting，as well as the regions of depth of Ⅱ-1 orebody 54 to 86 exploration lines and depth of Ⅲ-6 orebody 62 to 110 exploration lines are the favorable target area for the deep exploration.