山东省招莱金矿带金矿地球化学异常模式及地质效果

THE GEOCHEMICAL ANOMALY PATTERN AROUND THE GOLD DEPOSITS IN THE ZHAOLAI GOLD BELT AND ITS APPLICATION IN GOLD EXPLORATION

摘要:

金矿带位于胶北隆起的西北部,栖霞复背斜北翼。矿床类型为蚀变岩型和石英脉型。金矿严格受NE、NNE向构造控制。金矿床最佳元素组合是:Au、Ag、Te、Bi;Au、Ag、Cu、As、Pb。找矿指示元素为:Au、Ag、Te、Cu、Pb、Zn、Sb、Mn、Ba等10种。Au与Ag、As、Te、Bi、Cu密切相关,Au与Ag、As、Te相关系数接近1。矿体异常按三级浓度带圈定,出现三个浓度带的元素有:Au、Te、Ag、Cu、还有Zn、Mo。外带与蚀变带空间展布基本一致,内带反映矿体空间位置。矿体元素轴向分带自上而下是:Sb、As、Ag、Pb、Bi、Cu、Se、Te、Au、Zn、Mn、Ba、Mo。矿体不同标高元素对比值(As×Ag)×100/Mn,矿体头部比值>2;矿体中部比值>0.5,<2;矿体尾部比值<0.5。矿体头尾晕判别函数分带指标,判别函数是:y=0.0685Ln(Ag×As)-0.0182Ln(Au×Te)-0.0203LnCu-0.1046LnMn。判别临界值Yc=-0.4960,当判别函数Yc大于或小于-0.4960时,分别为矿体头部和尾部指标。金矿床地球化学异常模式,异常元素在矿体空间有明显浓度分带和垂...

Abstract:

The gold ore zone is located in the north-west of the Jiaobei Uplift and the north flank of the Qixia Anticlinorium. The depositions can be classified into two types, namely, the alteration rock type and the quartz vein type, which are highly controlled by the NE trending and NNE-trending structures.The most favourable combinations of the gold deposits are: Au, Ag, Te, Bi; Au, Ag, Cu, As, Pb. There are ten indicator elements for gold prospecting, ie. Au, Ag, As, Te, Ca, Pb, Zn, Sb, and Ba. Au is closely rel...