贵州天柱磨山─油麻坳金矿化带地球化学特征及成矿作用

Geochemical Characteristics and Metallogenesis of Moshan-Youma′ao Gold Mineralized Zone in Tianzhu,Guizhou

贵州天柱磨山油麻坳金矿化带地球化学特征及成矿作用＊张杰余大龙李明琴张先煜杨勇俊（贵州工业大学资源工程系，贵阳５５０００３）关键词金矿化带金矿地球化学金矿成矿作用黔东天柱本文主要研究了黔东天柱磨山—油麻坳金矿化带内主要类型岩石矿石的地质－地球化学特征，...

The gold bearing quartz vein of Moshan-Youma′ao mineralized zone in Tianzhu,Guizhou Province occurs in the volcanic tuffaceous slate of Qingshuijiang Formation in the Xiajiang Group .The trace elements and REE patterns of the rock and gold bearing quartz veins suggest that metallogenic materials were derived from the ore controlling strata.δ 34 S in pyrite and arsenopyrite are +8.3‰～+12.54‰,with an average of 10.07‰, showing the sulfur in the ore field was probably derived from the strata.δ 18 O values and δD values show that metallogenic fluids were mainly derived from mixing flow of the metamorphic water and the meteoric water.Metalloginic environment was the weak reduction type.It is obvious that in the initial stage,the tectonic movement and hydrothermal reformation made gold concentrated in wall rocks of mineralized zone;in the late stage,the gold bearing quartz veins have been reached through repeated concenration of gold under the action of tectonic movement and fluid reforming.Mineralization have the features of deposition-metamorphism-reformation.