豫西前河金矿床构造原生晕特征及其对深部找矿的指示

Structural primary halo characteristics of Qianhe Gold Depositin western Henan and its indication for deep prospecting

前河金矿床是典型构造蚀变岩型金矿床,矿体受近东西向构造控制。构造研究表明,该矿区经历了多期演化,形成近东西向、北东向、南北向等3个方向的构造,不同构造对矿体起着控制或破坏作用。F_(4)断裂为近东西向构造的典型代表,为Ⅳ号矿带的容矿构造。通过对Ⅳ号矿带进行构造原生晕分析,认为头晕元素整体以中、内带异常为主,近矿晕元素以内带异常为主,尾晕元素分布差别较大,可能与元素变异系数变化较大有关。葚沟矿段00中段83勘探线深部、石家岭矿段260中段43勘探线—45勘探线深部均具有较好的找矿前景。

Qianhe Gold Deposit in western Henan is a typical tectonic altered rock type gold deposit,and the ore body is controlled by the near EW trending tectonic belt.The study of tectonics shows that the area has undergone multi-stage evolution,forming 3 structures in the direction of near EW,NE,and SN,and different structures play a controlling or destructive role in the ore body.The F_(4) fault is a typical representative of the near EW structure,which is the ore-hosting structure of No.IV ore belt.Through the analysis of structural primary halo in No.IV ore belt,it is considered that the head halo elements are mainly anomalous in the middle and inner zones,and the near-ore halo elements are mainly anomalous in the inner zone.The distribution of tail halo elements is quite different,which may be related to the great variation of element mutation coefficient.The deep part of Exploration Line 83 in Level 00 of Shengou ore section and the deep part of Exploration Line 43-Exploration Line 45 in Level 260 of Shijialing ore section have good prospecting prospects.