个旧西区北接触带成矿预测

Minerogenetic Prognosis of North Contact Zone in the West Ore District of Gejiu

从个旧锡矿西矿区成矿地质条件和矿产分布规律的分析,得出西区以Pb、Zn,Mo 和 Ag(Au)等亲硫、中—远程元素为主成矿的结论,与东区以 Sn,W,Bi 等亲氧、近程元素为主的成矿特点有较大差异;并按元素组合(Pb—Zn—Ag,Pb—Mo—Ag 和 Au—As—Hg)对西区北接触带矿产进行两级预测,划分出四个预测区(带),其中又划分出若干高级预测小区,以缩小靶区,这对西区的深入找矿具指导意义。

Mineral-formation geological condition and the laws of mineralized distribution in the West Ore District of Gejiu have been analysed in this paper.The author has come to the conclusion that main ore-forming elements are Pb,Zn,Mo and Ag(Au)in the west district.These elements are sulfophile medium-telethermal ones.And the main ore-forming elements of east district are Sn,W and Bi etc.They belong to oxyphile near range elements.Minerogenetic prognosis of north contact zone in the West Ore District has been made according to element associations(Pb-Zn-Ag,Pb-Mo-Ag and Au-As-Hg).Four prognostic districts have been divided.Some further small districts have been subdi- vided in order to contract prospecting area,which has a guiding significance to further prospecting in the West Ore District of Gejiu.