华北地区重晶石矿资源特征及找矿方向

The characteristics of barite deposits and prospecting direction in North China

华北地区是重晶石矿发育的有利成矿地区之一。近年来,随着矿产勘查和研究程度的不断加强,区内先后发现/勘查了重晶石矿床(点)51处,其中中型4处,小型24处,矿(化)点23处,主要集中分布在山东和河南,少量分布在山西、河北和天津,累计探明重晶石矿资源储量2838万吨。矿床类型以热液型为主,次为内生层控型。成矿时代主要为中生代白垩纪时期。本文在全面掌握华北地区矿产资源潜力评价资料基础上,初步分析和总结了重晶石矿床时空分布规律及控矿因素,圈定出重晶石找矿远景区10处,并提出应加强已知矿床(点)深部勘查以及矿区外围典型地层层位和构造方面的研究工作,有望取得找矿新突破。

North China is one of the favorable areas for barite mineralization.With the continuous strengthening of mineral exploration,51 barite deposits(ore occurrences)including 4 medium-sized deposits,24 small-sized deposits and 23 occurrences have been discovered in North China in recent years.These barite deposits(occurrences)are mainly distributed in Henan and Shandong provinces,and a small amount in Shanxi,Hebei and Tianjin provinces.The accumulated proved reserves of barite mineral resources are 28.38 million tons.It is shown that the genetic type of barite deposits in North China is hydrothermal type,followed by endogenic stratum-controlled type,and the most important metallogenic epochs occurred in Early Cretaceous.Based on the systematic collection of mineral resources in this area,the spatial and temporal distribution and ore-controlled factors of barite deposit have been summarized preliminary,10 prospective areas for barite prospecting were delineated.It is suggested that the deep exploration of known mining areas and the study of typical strata and structures around the mining area should be strengthened,which are expected to achieve a breakthrough in the prospecting of barite deposits.