闽东南丘陵区地质背景对土壤金属元素影响研究

Effect of Geological Background on Soil Metal Elements in Hilly Areas of Southeast Fujian

本研究以永春县为主要研究区域,在永春县农业地质调查评价基础上,通过分析不同地质背景下土壤中主要金属Cd、Hg、As、Pb、Cr、Ni含量的变化,查明闽东南丘陵区地质背景对表层土壤金属元素的影响。结果表明:研究区具有良好的表层土壤环境质量。二叠纪、三叠纪地层背景土壤中金属元素的指标含量较高;侏罗纪石英闪长玢岩侵入岩体中金属元素含量普遍较高,大多金属元素指标在壤土、粘土中较高。土壤中金属元素的含量与地层背景、侵入岩岩体呈现出较强的相关性,与土壤质地及土壤地质成因呈现出较弱相关性。

Yongchun County is the main research area in this study.Based on the evaluation of agricultural geological survey in Yongchun County,The contents of Cd,Hg,As,Pb,Cr and Ni in soils under different geological background were analyzed.To find out the influence of geological background on metal elements in surface soil in hilly area of southeastern Fujian.The results show that:The study area has good surface soil environmental quality.The contents of metal elements in the soil of Permian and Triassic strata background are relatively high.The content of metal elements in Jurassic quartz diorite porphyry intrusive rock mass is generally high.Most metal elements are higher in loam and clay.The content of metal elements in soil has a strong correlation with stratum background and intrusive rock mass.It has weak correlation with soil texture and soil geological origin.