论文部分内容阅读
大青山地区出露地层主要是侏罗系中统兰旗组安山岩、安山质角砾熔岩、凝灰岩等;侵入岩为晚侏罗世二长花岗岩;断裂发育,岩石蚀变强烈。金地球化学特征表明,金主要富集在侏罗系中统兰旗组火山岩中。金的原生晕、次生晕异常特征和分布表明,破碎蚀变岩带就是金矿化蚀变带。通过野外地质调查已在三道盘—马家窝铺的安山岩和二长花岗岩中发现了5条金矿化带和29条金银矿脉。实践证明,在大青山地区进行金矿普查运用地球化学方法是有效的。
The exposed formations in the Daqingshan area are mainly Jurassic Zhonglan Flag Group andesite, andesitic breccia lava and tuff, and the intrusive rocks are late Jurassic monzonitic granite. The faults developed and the rock altered strongly. Gold geochemical characteristics indicate that gold is mainly enriched in the Jurassic Central-Langqi volcanic rocks. The primary halo and secondary halo of gold show that the anomalous alteration zone of gold mineralization is the alteration zone of crustal alteration. Five gold mineralization zones and 29 gold and silver veins have been found in andesite and monzogranite of the Majiawopu shop through field geological survey. Practice has proved that in the Daqingshan area geochemical survey of geochemical methods is effective.