基于克里格法刻画砂岩型铀矿U、Ra和U-Ra平衡系数垂向分布规律——以二连盆地芒来铀矿床为例
Vertical Distribution Patterns of the U,Ra and U-Ra Equilibrium Coefficient for Sandstone Uranium Ores Based on the Kriging Method:An Example from the Manglai Uranium Deposit in Erlian Basin
王伟 1武正乾 1熊攀 2刘坤鹏 1黄镪俯 2王晓鹏1
作者信息
- 1. 核工业二〇三研究所,陕西西安 710086
- 2. 核工业二〇八大队,内蒙古包头 014010
- 折叠
摘要
砂岩型铀矿是绿色经济可采的重要能源矿种,目前是世界上重要的铀矿勘探类型之一.二连盆地芒来铀矿床、鄂尔多斯盆地纳岭沟铀矿床铀矿体多呈板状产出,板状铀矿体成因备受关注.为研究砂岩型铀矿内部U、Ra和铀镭平衡系数(Kp)分布的垂向分布规律,本文以二连盆地芒来铀矿床为例,采用具有网格精度高优点的克里格插值法研究U、Ra和Kp垂向分布规律,分别利用放射性样品分析数据和定量伽马测井五点式反褶积法反演U含量数据,通过克里格法精细刻画砂岩型矿体中U、Ra和Kp分布的垂向分布规律.研究发现,该矿床板状矿体内部具有卷状的特征,Kp分布形态可以用来判断含氧含铀水的运移方向以及氧化强弱.该方法对研究铀矿体形态、铀矿成矿规律和后续地浸开采具有重要意义.
Abstract
Sandstone-type uranium ore is an important green and economically recoverable energy ore type,which is one of the important types of uranium exploration in the world.The ore bodies of the Manglai uranium deposit in the Erlian Basin and Nalingou deposit in Ordos Basin generally display a tabular shape,and the genesis of these tabular uranium orebodies has attracted much attention.This work aims to study the vertical distribution patterns of U,Ra and Kp(uranium-radium equilibrium coefficient)within the sandstone-type uranium ore bodies in the Manglai uranium deposit of Erlian Basin.The kriging interpolation method with high grid precision was adopted to study the vertical distribution law of U,Ra and Kp,and radioactive samples and the five-point inverse fold accumulation method of quantitative gamma log were utilized to inverse the U content.Then the U content in the sandstone ore body was finely delineated by the kriging method.Results show that the tabular ore bodies in the Manglai deposit display rolled characteristics,and the distribution patterns of Kp can indicate the transport direction of oxygenated uranium-containing water as well as the strength of oxidation.This study will aid to study the morphology of uranium ore bodies,and is of great significance for understanding the uranium ore formation law and subsequent in-situ leaching mining.
关键词
克里格法/砂岩型铀矿/U、Ra和U-Ra平衡系数Kp/五点式反褶积法/垂向分布规律/芒来铀矿床/二连盆地Key words
kriging/sandstone-type uranium ores/U/Ra and U-Ra equilibrium coefficient(Kp)/five-point inverse fold method/vertical distribution pattern/Manglai uranium deposit/Erlian Basin引用本文复制引用
基金项目
中国核工业地勘基金(2022-17)
&&(202115-2)
&&(202302-2-2)
出版年
2024
国家科技期刊平台
NSTL
万方数据