物探与化探2026，Vol.50Issue(3)：567-579,13.DOI:10.11720/wtyht.2026.0009
基于"地理探测器"的珠三角地区地—空界面γ辐射场的空间分布差异影响机制研究
Investigating mechanisms influencing the spatial variations of the gamma radiation field at the ground-air interface in the Pearl River Delta Economic Zone based on Geodetector
摘要
Abstract
By integrating multi-source radioactivity survey data and using Geodetector,this study explored the spatial variations of the gamma radiation field at the ground-air interface and their influence mechanisms in the Pearl River Delta economic zone.The results in-dicate that key factors influencing the distribution of the radiation field include soil radon concentration(q=0.852),238U content(q=0.816),and 232Th content(q=0.803).Besides,formation lithology(q=0.791),fault structures(q=0.786),and chronostratigraphy(q=0.778)also play a significant role.The interaction detection indicates that the synergy of soil radon concentration and fault structures demonstrates the strongest explanatory power(q=0.875),suggesting the mechanism of structure-controlled transport and soil-controlled accumulation.Risk detection demonstrates that high-radiation radon contributors include normal faults,magmatic rocks,and Jurassic strata.The results of this study reveal that the spatial distribution of the radiation field is governed by a three-level system comprising nu-clide content as a direct source,lithology and chronostratigraphy as carriers,and fault structures as pathways for radon transport.The re-search results have provided a scientific basis for regional radiation environmental risk assessment and pollution prevention and control.关键词
珠江三角洲经济区/地—空界面 γ 辐射场/地理探测器/影响机制Key words
Pearl River Delta Economic Zone/gamma radiation field at the ground-air interface/geodetector/influence mechanism分类
天文与地球科学引用本文复制引用
易隆科,杨波,李冠超,林小明,胡颖..基于"地理探测器"的珠三角地区地—空界面γ辐射场的空间分布差异影响机制研究[J].物探与化探,2026,50(3):567-579,13.基金项目
广东省地质勘查与城市地质专项"广东粤东地区1∶25万区域地球化学调查与全省成果集成"(2023-25) （2023-25）
广东省市场监督管理局2023年第一批广东省地方标准制修订计划项目"《城市放射性地质调查技术规范》"(粤市监标准[2023]211号) （粤市监标准[2023]211号）
