南阳盆地东部山区土壤锗分布特征及其影响因素分析  

Distribution Characteristics and Influencing Factors of Germanium in Soil in the Eastern Mountainous Area of the Nanyang Basin

作　　者：董秋瑶[1,2] 赖书雅 宋超 温皓天[1,2,4] 严明疆 杨振京 DONG Qiu-yao;LAI Shu-ya;SONG Chao;WEN Hao-tian;YAN Ming-jiang;YANG Zhen-jing(Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China;Key Laboratory of Quaternary Chronology and Hydro-Environmental Evolution,Chinese Geological Survey,Shijiazhuang 050061,China;School of Earth Sciences,Hebei GEO University,Shijiazhuang 050030,China;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061 [2]中国地质调查局第四纪年代学与水文环境演变重点实验室,石家庄050061 [3]河北地质大学地球科学学院,石家庄050030 [4]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《环境科学》2022年第6期3278-3287,共10页Environmental Science

基　　金：中国地质调查项目(DD20190532);国家自然科学基金项目(41877398)。

摘　　要：基于南阳盆地西南耕地区土地质量地球化学调查成果,对南阳盆地东部山区表层(0~20 cm)土壤及深层(150~200 cm)土壤锗(Ge)的含量情况、空间分布规律和富集特征进行了研究,并对表层土壤Ge的影响因素进行分析.结果表明,南阳盆地东部山区表层和深层土壤ω(Ge)平均值分别为1.39 mg·kg^(-1)和1.45 mg·kg^(-1).表层土壤Ge土地质量评价等级划分中处于一等丰富等级的点位占比为12.77%,处于二等较丰富等级的点位占比为32.22%,其中表层土壤Ge含量丰富区主要分布在研究区变质岩发育区和小片的花岗岩发育区.研究区表层土壤Ge变异函数的最优理论模型为球状模型,块金效应值为0.434,表明表层土壤Ge空间自相关性中等,受随机因素和结构性因素的共同影响.富集因子显示表层土壤Ge有93.61%的点位主要受自然因素影响,但存在6.39%的点位受人为因素影响较大.研究区土壤Ge来源主要受到成土母质的影响,但表层土壤Ge的富集主要受到土壤中铁、锰氧化物、石英和pH值的影响.Based on the land quality geochemical survey results in the southwest cultivated area of Nanyang Basin,the content,spatial distribution,and enrichment characteristics of Ge in surface soil(0-20 cm)and deep soil(150-200 cm)in the eastern mountainous area of Nanyang Basin were studied,and the influencing factors of Ge in the surface soil were analyzed.The results showed that the averageω(Ge)in the surface soil and deep soil were 1.39 mg·kg^(-1)and 1.45 mg·kg^(-1),respectively.In the study area,32.22%of surface soil and 12.77%of surface soil was rich in Ge,and the rich areas of the surface soil Ge were mainly distributed in the metamorphic rock and granite-dominant development areas.The optimal theoretical model of surface soil Ge variogram in the study area was a spherical model,and the nugget effect value was 0.434,indicating that surface soil Ge had moderate spatial correlation due to the joint influence of random factors and structural factors.The enrichment factor showed that 93.61%of Ge sites in the topsoil were mainly affected by natural factors,whereas 6.39%of Ge sites were significantly affected by human factors.The source of Ge in soil in the study area was mainly affected by the parent materials of soil formation,but the enrichment of Ge in surface soil was mainly affected by the Fe,Mn oxides,quartz,and pH in the soil.

关 键 词：锗(Ge) 土壤 分布特征 影响因素 南阳盆地 

分 类 号：X53[环境科学与工程—环境工程]