陕西省秦巴地区金元素找矿预测区划分及其地球化学特征

Division of gold element prospecting area in Qinba region of Shaanxi Province and its geochemical characteristics

近年来陕西省秦巴地区金矿找矿难度增大,笔者在研究金的富集规律、建立区域不同类型金的典型矿床地球化学找矿模式的基础上,遵循相似地质条件和相似异常特征有可能找到相似矿床的经验规律,从Au异常分布特征、元素组合特征及地质背景研究入手,结合目前的金矿勘查成果,通过分析对比,对异常分类、筛选,将陕西省秦巴地区划分为12个金找矿预测区,并指出了各预测区地质特征、地球化学特征、控矿条件、主要的找矿区域及矿产类型,为该区下步金找矿工作部署,找矿方向提供了方向及借鉴。

In recent years,exploration of gold ore deposits in the Qinba region of Shaanxi Province has become increasingly difficult.Based on the study of gold enrichment patterns and geochemical prospecting models for different types of gold deposits in this area and following the rules of finding the similar deposits with similar geological conditions and similar anomaly characteristics. Starting with the characteristics of Au anomaly distribution,elemental composition and geological background,combined with the current exploration results for gold ore deposits,and based on analysis,comparison,classification and screening of anomalies,the authors divided the Qinba region in Shaanxi Province into 12 gold prospecting areas. The characteristics of geology,geochemistry,ore-controlling conditions,major ore-prone areas and mineral types of each prospecting area were also figured out. In addition,the direction for the prospecting deployment in this region were pointed out for reference.