阿克提什坎金矿的发现及基本特征

对阿尔泰山区金异常快速追踪及资料综合整理后,发现阿克提什坎是一个很有前景的原生金成矿区。初步认为该矿是古生代陆相火山岩经浅成低温热液溶滤而成的金矿,属层控型,成矿时代为华力西晚期到燕山早期,冰长石的K-Ar年龄为178.5±2.5Ma。

MAIN CHARACTERISTICS OF AKETISIKAN OCCURRANCE, ALATI

In the summer of 1988, after comprehensive analyses of geological and geochemical information of Altai mountain area, related with primary gold deposite, geologists of research team which consisting of Nanjing institute of geology & mineral resources and the first party of Xinjiang bureau of geology & mineral resources, believe this area to be most perspective for primary gold deposit. By field investigation and simple geological engineering evaluation, and by comprehensive analysis and evaluation of available date, lized and calculation of total gold reserves Aketisikan gold deposit is confirmed, and this area is considered as a most prospective area for gold. Based on the study of the deposit features, it is revealed that mineralized country rock is welded tuff and tufflava, mineralized bodies are characterized by stratified or stratioid and controlled by stratigraphic formation, ore is high in K, As, Si, and low Na, S, mineral comoosition is simple, distinguishing minerals is arsenopyrite and adularia, conuntry rock alteration is strong, gold mineralization is close relatied to berazitization, adularization, arsenopyritization. At last, this paper primarily discusses Physical-chemistrical condition and genesis of this gold deposit, and based on the value of 178.5 Ma of K-Ar age of adularia, it is considered that this gold deposit formed in Late Variscan to Early Yenshanian, its type belongs to a stratabund epithermal deposit.