金平龙脖河铜矿床新莲矿段地质特征及找矿预测

Prospecting Prediction and Geological Features of Xinlian Ore Section in Longbohe Cu Deposit,Jinping County,Yunnan Province,China

新莲矿段海相火山岩型铜矿受地层岩性、构造、海相变基性火山岩控制,铜矿体赋存于老新街背斜轴部及其两翼变基性火岩中,变基性火山岩既是成矿母岩,也是容矿岩石,具有矿床规模大、品位稳定、矿体成带成群分布、矿石质量好的特点;通过前期整装勘查工作,总结出了"四旋回、六层楼"矿化模式,目前已探获铜资源量达中型矿床规模;对比75-127勘探线范围内已探获的铜资源量,预测新莲矿段矿床规模可达大型,铜资源量可达50万t以上。

The marine volcanic copper deposit in Xinlian ore section is controlled by lithology, structure and marine metamorphic volcanic rock. Copper ore body occurs in metamorphic basic rocks, which lies in the axis and two wings of Laoxinjie anticline. Metamorphic basic volcanic rock is not only mother rock but host rock, whose features includes large deposit scale, stable grade, and great ore quality and distributed in the form of groups and zones. Based on former integrated exploration, we can make a conclusion that it is a metallogenic model of four-stage cycles and six floors. The proved reserves of copper reach medium-seized deposit now. Regarding to the proved reserves of copper among exploration line from 75 to 127, we can predict that Xinlian ore section contains more than 500 thousand tons of copper reaches large ore deposit.