| 李磊,王伟,喻腾,李涛.鄂尔多斯盆地彬县—长武地区直罗组物探参数特征及研究[J].矿产勘查,2025,16(S2):94-100 |
| 鄂尔多斯盆地彬县—长武地区直罗组物探参数特征及研究 |
| Geophysical parameters characteristics and research of the Zhiluo Formation in Binxian-Changwu Area of Ordos Basin |
| 投稿时间：2025-11-25 |
| DOI：10.20008/j.kckc.2025s2015 |
| 中文关键词: 砂岩型铀矿 物探参数 直罗组 鄂尔多斯盆地 |
| 英文关键词: sandstone-type uranium deposit geophysical parameters Zhiluo Formation Ordos Basin |
| 基金项目:本文受中国核工业地勘基金项目“鄂尔多斯盆地南部旬邑－盐池地区铀矿资源调查评价与勘查”(2022-17)资助。 |
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| 中文摘要: |
| 砂岩型铀矿资源量 -储量计算过程中矿石物探参数是至关重要的，它们在铀矿区的变化规律和数值大小直接影响铀矿的储量计算。本文就鄂尔多斯盆地彬县—长武地区直罗组矿石密度、湿度、铀镭平衡系数、有效原子序数、钍钾元素干扰进行了分析研究，结果表明，矿石湿密度均值 2. 16 g/cm3，矿石干密度均值2. 09 g/cm3，湿度均值 3. 26%，有效原子序数均值 11. 09，矿石钍含量平均值为 14. 09×10-6，钍铀比值为 0. 01~0. 07，钾含量平均值为 1. 85×10-2，单样品铀镭平衡系数为 0. 11~0. 68，与矿石铀含量呈现负相关，与矿石的埋深关系不明显，在 γ测井及资源量估算时应做铀镭平衡系数修正，其余参数不做修正。通过对彬县—长武直罗组物探参数统计研究，为铀矿测井参数修正、铀矿资源量计算提供了依据。 |
| 英文摘要: |
| In the process of resource-reserve calculation for sandstone-type uranium deposits，ore geophysical parameters are of paramount importance，as their variation patterns and numerical values directly impact the reserve estimation of uranium deposits. This paper analyzes and investigates the ore density，moisture content， uranium-radium equilibrium coefficient，effective atomic number，and thorium-potassium element interference in the Zhiluo Formation of the Binxian-Changwu area in the Ordos Basin. The results indicate that the average wet density of the ore is 2. 16 g/cm3，the average dry density is 2. 09 g/cm3，the average moisture content is 3. 26%， the average effective atomic number is 11. 09，the average thorium content is 14. 09×10-6，the thorium-to-uranium ratio ranges from 0. 01 to 0. 07，and the average potassium content is 1. 85×10-2. The uranium-radium equilibrium coefficient for individual samples ranges from 0. 11 to 0. 68，showing a negative correlation with uranium content and no obvious relationship with ore burial depth. During γ -logging and resource estimation，correction for the uranium-radium equilibrium coefficient is required，while the other parameters do not require correction. Throughthe statistical study of geophysical parameters of the Zhiluo Formation in the Binxian-Changwu area，this research provides a basis for the correction of logging parameters and the calculation of uranium resources. |
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