金平长安—银厂坡矿床地球物理深部构造特征及其对找矿的指导意义

Geophysical deep structure features of Chang'an-Yinchangpo deposit in Jinpin town and its significance for prospecting

将云南金平长安金矿V5矿体与银厂坡金矿作为一个整体进行研究,以该区的控矿断裂F6为主要研究目标,以矿区各类岩性电性特征作为约束条件,在长安—银厂坡矿区开展了4条大地电磁测深剖面测量,以期通过大地电磁测深数据反演得到的电阻率低阻体来确定F6的空间分布形态,为该区深部及外围找矿工作提供科学依据.研究结果表明：1长安金矿V5矿体的主要控矿断裂F6往深部延伸到了2000 m左右,结合对长安金矿成矿作用的认识,提出该矿区600~2000 m深处存在第二找矿空间的可能;2银厂坡金矿与长安金矿V5矿体同属F6控制,笔者推断银厂坡金矿区除目前已发现的残坡积土型氧化矿外,深部应该还存在硫化主体矿,其找矿模式可参考长安金矿V5矿体的勘查模式.

Made the Chang ’an gold deposit V5 orebody and Yinchangpo gold deposit in Jinping county of Yunnan province as a whole to study. Taking the ore controlling fracture F6 as main objective, all kinds of lithological electrical characteristics as constraints,the author carry out four high frequency magnetotelluric sounding profiles in the mining area,in purpose to determine the spatial distribution pattern of F6 by inversion resistivity profile features. Then offer help for deep and periphery area prospecting.The result is that： 1The ore controlling fracture F6 extended to the2000 meters deep from surface. Based on the study on mineralization of Chang ’an gold deposit,the author put forward there are second possible prospecting space under 600 meters to2000 meters deep from surface. 2 Yinchangpo gold mine and Chang’an gold deposit are controlled identically by F6. Because the deep orebody are not be founded in Yinchangpo gold deposit all the time since,this research findings mean that it must exist deep orebody like Chang’an gold deposit. So the prospecting model can refer to Chang’an gold deposit model.