CAJ | 학술논문

一直以来，利用铀、钍、钾同位素的γ能谱寻找铀矿是铀矿地质重要的放射性物探手段。同样，水系沉积物化探中铀、钍、钾元素作为铀矿化探重要指示元素，在铀矿资源潜力预测评价中亦发挥了重要作用。笔者论述了水系沉积物铀、钍、钾元素在铀矿预测评价中的指示作用和异常特点，以及中国铀、钍、钾元素地球化学场分布特点和规律，将铀、钍、钾异常按累频占比划分为特高异常（异常内带）、高异常（异常中带）、异常（异常外带）和高背景，同时，论证了铀、钍、钾异常分布与铀成矿关系。可以看出，铀、钍、钾异常分布有明显的区域特征，现有的异常分布区与我国四大类型铀矿产区高度一致，其异常分布对我国铀、钍矿资源预测评价具有重要意义。
일직이래，이용유、토、갑동위소적γ능보심조유광시유광지질중요적방사성물탐수단。동양，수계침적물화탐중유、토、갑원소작위유광화탐중요지시원소，재유광자원잠력예측평개중역발휘료중요작용。필자논술료수계침적물유、토、갑원소재유광예측평개중적지시작용화이상특점，이급중국유、토、갑원소지구화학장분포특점화규률，장유、토、갑이상안루빈점비화분위특고이상（이상내대）、고이상（이상중대）、이상（이상외대）화고배경，동시，론증료유、토、갑이상분포여유성광관계。가이간출，유、토、갑이상분포유명현적구역특정，현유적이상분포구여아국사대류형유광산구고도일치，기이상분포대아국유、토광자원예측평개구유중요의의。
The utilization of uranium, thorium, potassium isotope gamma spectra for uranium prospecting is an important means of radi-oactive exploration. Similarly, uranium, thorium, potassium elements in stream sediments can serve as important indicator elements for uranium geochemical prospecting and have played important roles in the evaluation of China's uranium resource potential. This paper discusses the effect and anomaly characteristics of uranium, thorium, potassium elements in stream sediments, and expounds geochemi-cal distribution characteristics and regularity of China's uranium, thorium, potassium elements. According to percentages of strokes, the anomalies of these elements can be divided into ultra-high anomaly (abnormal inner zone), high anomaly (abnormal mesozone), a-nomaly (abnormal outer zone) and high background. the relationship between the distribution of uranium, thorium, potassium anoma-lies and uranium mineralization is also demonstrated in this paper. As can be seen, the distribution of uranium, thorium, potassium a-nomalies has obvious regional characteristics, the existing anomaly area are highly consistent with four major types of uranium mineral areas in China, and hence the anomaly distribution has great significance for the prediction and evaluation of uranium and thorium min-eral resources.