冀东司家营铁矿矿床特征及找矿方向分析

An Analysis of the Characteristics and Prospecting Directions of the Sijiaying Iron Deposit in Eastern Hebei

司家营铁矿为冀东地区特大型沉积变质铁矿床,历史上以平青大公路附近的S6线为界,将其划分为南、北两区。司家营铁矿勘查工作大致分为2个阶段,20世纪50年代至80年代初为第一阶段,勘查深度在埋深600 m以浅,累计查明铁矿石资源量23.6亿吨,TFe 30.00%;2008—2020年为第二阶段,勘查深度在埋深1200 m以浅,新增铁矿石资源量11.5亿吨,TFe 29.62%,潜在矿产资源1.4亿吨。综合历次勘查成果,系统总结了其矿床地质特征、地球物理特征,应用勘查区找矿预测理论方法体系,构建了勘查区找矿预测模型,探讨了其资源潜力和进一步找矿方向。

The Sijiaying iron deposit,one of the super-large iron deposits in eastern Hebei,was historically devided into two areas by S6 line near the Pingquan-Qinglong-Laoting provincial road,including the south district and the north district.There are two stages in the history of the prospecting and exploration of Sijiaying iron deposit.In the first phase,from 1950 s to 1980 s,the exploration depth is generally from the surface to 600 meters,a total of 2.36 billion tons of iron ore reserves were prospected with TFe 30.00%;in the second phase,from 2008 to 2020,the exploration depth is generally from the surface to 1200 meters,1.15 billion tons of iron ore reserves were newly prospected with TFe 29.62%,and also 0.14 billion tons of potential resources.This paper systematically summarized the geological characteristics,geophysical features based on the comprehensive study of each exploration results,established a prediction model of prospecting through the prediction theory and methodology of ore prospecting,explored the resource potentiality and further prospecting directions of Sijiaying iron deposit.