云南元谋姜驿铁矿地质特征及找矿标志

THE GEOLOGICAL FEATURE AND PROSPECTING CRITERIA OF JIANGYI FE DEPOSIT IN YUANMOU,YUNNAN

云南元谋姜驿铁矿矿体、矿化体呈似层状赋存于元古界大营山岩组上段(Pt_(1)dy^(2))绿泥片岩、变粒岩中,矿体与岩层产状基本一致。该磁铁矿是由火山沉积形成矿源层,经变质作用叠加形成的多成因铁矿床。大营山岩组上段(Pt_(1)dy^(2))变质岩系是找矿的层位标志,高精度磁测异常是直接的找矿标志。

The orebody,metallogenesis body of Jiangyi Fe deposit in Yuanmou,Yunnan is stratoid in Proterozoic Dayingpan rock formation upper member (Pt_(1)dy^(2)) chlorite schist,granulite.The orebody occurrence is basically consistent with that of the rock bed.The ore source bed of this magnetite deposit is formed by the volcanic sedimentation,then the Fe deposit is formed by the metamorphism superimposition.Dayingshan rock formation upper member (Pt_(1)dy^(2)) metamorphic rock series is the horizontal prospecting criteria,and the high precision magnetic survey anomaly is the direct prospecting criteria.