自然伽玛测井在河北某地区矿产普查中的应用  

The natural gamma log is located somewhere in Hebei Application of "three dilute" element mineral exploration in aluminiferous rock series

作　　者：陈学蓉 王颖 CHEN Xue-rong;WANG Ying(Hebei Bureau of Geology and Mineral Exploration and Development no.9 Geological brigade,Xingtai 054000,China)

机构地区：[1]河北省地质矿产勘查开发局第九地质大队,河北邢台054000

出　　处：《世界有色金属》2022年第23期163-165,共3页World Nonferrous Metals

摘　　要：普查区稀土矿床赋存于含铝岩系本溪组中,尤以本溪组中下部铁铝质粘土岩为代表。含铝岩系“三稀”矿与围岩存在明显的放射性差异。本次工作利用自然伽玛测井方法,确定了石炭系本溪组铝土质泥岩及铁铝质泥岩等稀土矿层顶底板的位置、深度、厚度,弥补了岩心采取率的不足,为地质勘查提供了依据。结合稀土矿样的化验结果,利用回归分析理论求取了稀土矿品位与放射性强度的相关关系,并进行了稀土矿工业品位预测,结果表明利用回归分析预测稀土矿工业品位是可行的,预测结果可以满足野外生产需要,为稀土矿勘探提供了有用信息。In this work,the position,depth and thickness of the top and bottom of the aluminous mudstone and ferric aluminous mudstone of the Carboniferous Benxi Formation were determined by using the natural gamma logging method,which made up for the lack of core taking rate and provided a basis for geological exploration.In combination with the test results of rare earth ore sample,using the theory of regression analysis to calculate the rare earth ore grade and the relation between radioactivity,and rare earth mine industrial grade prediction,the results show that using regression analysis forecast rare earths industrial grade is feasible,predicted results can meet the demand of field production,provides useful information for the rare earth ore exploration.

关 键 词：自然伽玛测井 稀土矿 相关性 稀土矿品位预测 

分 类 号：P631.81[天文地球—地质矿产勘探]