摘要
通过对五莲县中东部地区的天然放射性环境地质调查,分析了该区环境的放射性特征、分布规律及其影响因素。结果表明:调查区内天然放射性本底中,γ辐射剂量率背景值为80.0n Gy/h,公众照射所致居民平均年有效剂量为0.46m Sv。天然辐射高本底区域主要表现为岩石(土壤)γ剂量率和232Th核素含量异常特征,主要岩性为二长花岗岩和含黑云二长花岗质片麻岩。调查区内供水水源、河流及民用水井中水体的放射性核素浓度值均较低,水源安全。
Based on the natural radiation environmental geological survey in the middle east part of Wulian County,the author analyzed the characteristics,distribution and influencing factors of radioactivity. The results show that,in the natural radioactive background of the investigation area,the background value of γ-radiation dose rate is 80.0 n Gy/h,and the average annual effective dose of public exposure is 0.46 mSv. The high background area of natural radiation is mainly expressed by the abnormal characteristics of γ-radiation dose rate and the radionuclide 232 Th content,and its main lithology includes monzogranites and biotite monzonitic granitic gneiss. In the investigation area,the radionuclide concentration in water supply,river and water well is low,and hence the water source is safe.
作者
毕征峰
BI Zheng-Feng(Shandong Provincial No.4 Institute of Geology and Mineral Survey,Weifang 261021,China)
出处
《物探与化探》
CAS
CSCD
北大核心
2018年第4期833-838,共6页
Geophysical and Geochemical Exploration
基金
日照市国土资源局财政项目(201603号)
