河北承德地区土壤硒元素地球化学特征、地质成因及其生态环境评价  

Geochemical characteristics,geological genesis and ecological environment evaluation of soil selenium in Chengde,Hebei Province

作　　者：魏浩 卫晓锋 王京彬 朱苏加[4] 杨帆[5] 梁钊 田晓霞 李炜 贾文茹 于开宁 WEI Hao;WEI Xiaofeng;WANG Jingbin;ZHU Sujia;YANG Fan;LIANG Zhao;TIAN Xiaoxia;LI Wei;JIA Wenru;YU Kaining(Hebei Center for Ecological and Environmental Geology Research,Hebei GEO University,Shijiazhuang 050031,Hebei,China;Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,Hebei,China;Sino−Zijin Resources(Beijing)Co.,Ltd.,Beijing 100012,China;Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050011,Hebei,China;Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,Hebei,China;Institute of Grassland,Flowers and Ecology,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China)

机构地区：[1]河北地质大学河北省高校生态环境地质应用技术研发中心,河北石家庄050031 [2]河北地质大学河北省战略性关键矿产资源重点实验室,河北石家庄050031 [3]中色紫金地质勘查(北京)有限责任公司,北京100012 [4]河北省科学院地理科学研究所,河北石家庄050011 [5]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [6]北京市农林科学院草业花卉与景观生态研究所,北京100097

出　　处：《中国地质》2024年第4期1290-1303,共14页Geology in China

基　　金：河北省重点研发计划项目(19224205D);创新创业教育教学改革研究与实践项目(X2023cxcy007);国家自然科学基金项目(41672070,42001027)联合资助。

摘　　要：【研究目的】查明承德地区土壤硒的分布特征及地质成因,为当地土壤硒的勘查及有效利用提供科学依据。【研究方法】通过地质调查查明该区成土母质类型,利用X-射线荧光光谱法、电感耦合等离子体发射光谱法、凯氏定氮法等获取了553个土壤样品及66件岩矿石样品中硒及多个元素的含量,并利用SPSS软件分析数据,结合地质作用分析地质成因。【研究结果】研究区成土母质大致分为9类,表层土壤中硒含量最小值为0.016mg/kg,最大值为0.743 mg/kg,平均值为0.17 mg/kg,土壤平均硒含量仅为全国土壤平均硒含量的1/2,处于缺乏等级。铁矿石、金矿石、铅锌矿石中硒含量均值分别为0.860 mg/kg、1.233 mg/kg、3.365 mg/kg,明显高于各类矿石的尾矿及围岩。【结论】承德地区土壤硒整体含量很低,主要决定于成土母质,分布特征受控于地质建造。富硒土壤区域集中在隆化县南部(A区)、承德市南部(B区)(双滦区、双桥区)、宽城县东部(C区)。C区属于“岩石风化型”,与含硒量高的原生碳酸盐岩+碳质泥岩地层组合有关;B区属于“成矿伴生型”,与铅锌矿成矿过程中硒与金属硫化物的伴生关系及硒与硫的替代关系有关;A区属于“河道沉积型”,与河道沉积过程中河湖冲动力驱动、有机质的吸附作用有关。承德南部富硒区域具有发展林果经济的天然优势,围场县处于低硒环境,是引发克山病等地方病流行的因素之一。This paper is the result of agricultural geological survey engineering.Objective The study aims to delineate the distribution characteristics and geological origins of selenium in the soil of the Chengde area,providing a scientific foundation for the exploration and effective utilization of selenium in the region's soils.Methods Geological surveys were conducted to identify the types of soil parent materials in the area.The content of selenium and multiple elements in 553 soil samples and 66 rock/ore samples were determined using X−ray fluorescence spectrometry,inductively coupled plasma emission spectrometry,and the Kjeldahl nitrogen method.Data analysis was performed using SPSS software,with geological genesis being interpreted in conjunction with geological processes.Results The soil parent materials in the Chengde area are categorized into nine distinct groups.The selenium content in surface soils ranges from a minimum of 0.016 mg/kg to a maximum of 0.743 mg/kg,with an average value of 0.17 mg/kg.This average selenium content is half of the national average,indicating a state of deficiency.The average selenium content in iron ore,gold ore,and lead−zinc ore are 0.860 mg/kg,1.233 mg/kg,and 3.365 mg/kg,respectively,significantly higher than those in the tailings and wall rocks associated with various ores.Conclusions The overall selenium content in the soils of Chengde is very low,primarily determined by the soil parent materials,with distribution patterns influenced by geological formations.Selenium−rich soil areas are notably concentrated in the south of Longhua County(Area A),the southern parts of Chengde City(Area B)including Shuangluan and Shuangqiao districts,and the eastern part of Kuancheng County(Area C).Area C is characterized as“rock weathering type”,associated with the presence of selenium−enriched primary carbonate rocks and carbonaceous mudstones.Area B is classified as“mineralization associated type”,linked to the symbiotic relationship between selenium and metal sulfides during le

关 键 词：土壤硒 分布特征 相关性分析 地质成因 农业地质调查工程 承德市 河北省 

分 类 号：S153.6[农业科学—土壤学]