微机在地质找矿和远景评价中的积极作用

On the Geological Prospecting and the Ore Potential Evaluation with a Computer

本文以紫金山地区金矿预测为例，阐述了微机在地质找矿预测工作中所起的必不可少的先行作用。首先以紫金山地区的地质观测资料、数据为基础，根据不同的研究方向，有选择地用趋势、因子、聚类等多种方法对土壤、水系沉积物、岩石金属量和自然重砂测量等不同类型的数据进行统计分析，将计算结果绘制成相应的等值线、趋势面、剩余异常、谱系等成果图件。利用综合分析法，采用点面结合，从水平和垂直两个方向研究这些找矿信息与地层、构造、岩体、矿化、蚀变、剥蚀等因素之间的关系和变化规律及典型矿床成因，从而建立综合找矿信息，并在紫金山地区预测出大芨岗和黄金亭两个金矿成矿远景地段。

The paper focuses on the important role of a computer in the geological prospecting and ore potential evaluation, taking the Zijinshan gold-ores prospecting for example. Based on the spectrum analysis data of 2699 rock samples from the Zijinshan area, the characteristic values of 14 elements from the rocks in the surveyed area have been calcti-lated and some geological maps such as the trend maps of element distribution have been drawn with acomputer. The analysis results show that in the area the multi-stage tectonic-magmatic activity has an effect on the copper and gold mineralization and the mineralization and enrichment of copper and gold are obvious. The forecasting prospect of the metallogenic provinces in the Zijinshan area show that there are two gold metallogenic provinces: Dajigang An-Cu-Ag metallogenic province and Huangjinting gold metallogenic province.