广西大厂锡多金属矿田找金条件分析

Analysis of geological conditions for prospecting of gold deposits in Dachang tin-polymetallic ore field, Guangxi Province

文章根据对大厂锡多金属矿田已有找金线索的系统整理、找金条件的分析、金与其他成矿元素关系的研究及地表原生晕金含量平面分布图的编制,结合地质条件分析,指出了5个找金远景地段。据此预测结果,最近在其中的3个地段中取样13件,金含量在0 .2～2 .2 g/t之间的样品有7件。因此通过进一步的地质工作,大厂矿田内找金有望取得突破。

The Dachang tin-polymetallic ore field is an important base area for tin, antimony and zinc in China. At present, the Dachang mine is faced with serious shortage of the reserves. For the purpose of extending the mine's life, the exploration and integrated research on the prospecting of Sn, Sb, and Zn resources in the known ore fields must be strengthened. In addition, much importance should be attached to the prospecting for other metal resources, especially the gold resource, in the Dachang ore field. In this paper, the authors have delineated 5 favorable areas for the prospecting of gold resource. The delineation was based on a systematical analysis of known gold indicators and gold-controlling geological conditions, a geochemical study of gold and other significant pathfinder elements for gold mineralization and an observation of gold distribution in the Dachang ore field. 13 samples collected from three favorable areas in the Dachang ore field were recently assayed, and the result shows that gold values of 7 samples range from 0.2 g/t to 2.2 g/t. Breakthrough in gold prospecting in the Dachang ore field might be achieved through detailed geological work and integrated study.