广西袍里卡林型金矿床地质特征及找矿标志

摘要

Paoli gold deposit occurs in the fault altered fracture zone, the ore formation is limestone at the top of Heshan Group and silty mudstone at the bottom of Luolou Group,it is obvious layer controlling.The deposit is formed by three known orebodies, Ⅰ, ⅡandⅢ,the shape of orebody is bedded and lenticular,north-sorth trending.The gold bearing-rock is calcium terrigenous clastic rocks.The wall-rock alteration develop,the alteration is mainly quzatz,pyrite,arsenopyrite,limonite,clay and carbonate lithification,from inside to outside,which shows zonation. Through the study on ore deposit in the area of geological,geochemical and geophysical characteristics,in particular by high precision magnetic survey,central gradient array method and symmetric four-pole sounding method etc,the deposit has obvious geological,geophysical and geochemical prospecting criteria.Display Ⅱ and Ⅲabnormal obviously between the orebody,presumably,here the presence of a new orebodies or two ore body is linked together,the late drilling verification obvious gold anomalies.%袍里卡林型金矿床赋存于合山组灰岩顶部-逻楼组粉砂质泥岩底部断层蚀变破碎带中，具有明显的层控性。金矿体由3个（Ⅰ、Ⅱ和Ⅲ号）已知矿体构成，矿体呈透镜状和似层状，走向近SN，容矿岩石为含钙陆源碎屑岩。围岩蚀变发育，主要为硅化、黄铁矿化、毒砂化、褐铁矿化、粘土化以及碳酸盐化，由内向外呈现出分带性。通过对研究区内矿床的地质、地球化学及地球物理特征进行研究，尤其是通过进行地质、高精度磁测、中间梯度法以及对称四极电测深法等研究，显示Ⅱ和Ⅲ号矿体之间异常明显，推测此处存在新的矿体或者2个矿体相连，后期钻孔验证存在明显的金异常。袍里卡林型金矿床矿体具有明显的地质、地球物理及地球化学找矿标志。