摘要
通过对黔东南州表层土壤地球化学调查评价工作,首次查明了耕地土壤中锗含量和富锗质量等级特征,探讨了富锗土壤的物质来源和成因。结果表明:(1)区内表层土壤中锗含量0.13~9.21mg/kg之间,算术平均值为1.54mg/kg;(2)区内富锗耕地为1794.30km^(2),占调查面积的40.17%;富锗耕地环境综合等级主要以优先保护类为主,面积为1167.35km^(2),占富锗耕地面积的65.06%;安全利用类次之,面积为593.38 km^(2),占富锗耕地面积的33.07%;严格管控类较少,面积为33.57km^(2);(3)土壤中的锗元素主要缘于热液作用或热水活动使锗元素侵出而富集于地壳表层,Ge与Pb、Zn元素正相关性好,与N、有机质呈负相关关系,与其余元素呈弱正相关关系,受人为因素影响较小。
The germanium content and quality grade characteristics of germanium-rich soil in cultivated land of the Qiandongnan prefecture were determined in this study through the investigation and evaluation of the surface soil geochemistry and the material sources and causes of germanium-rich soil were discussed.The results obtained were as follows:(1)the germanium content in the surface soil of the area was 0.13–9.21 mg/kg,and the arithmetic average was 1.54 mg/kg.(2)The germanium-rich farmland in the area was 1794.30 km^(2),accounting for 40.17%.The environmental comprehensive grade of germanium-rich farmland is mainly for priority protection with an area of 1167.35 km^(2),accounting for 65.06%.The safe use category is second with an area of 593.38 km^(2),accounting for 33.07%.The strictly controlled farmland is less with an area of 33.57 km^(2).(3)The main source of germanium in the soil is hydrothermal action or hot water activity that causes germanium to intrude and accumulate on the Earth’s surface.Ge is positively correlated with the soil Pb and Zn content,negatively correlated with N and organic matter,and weakly and positively correlated with other elements,suggesting that Ge is less affected by man-made materials.
作者
张庆华
苏之良
罗勇军
张涛
但仕生
ZHANG Qinghua;SU Zhiliang;LUO Yongjun;ZHANG Tao;DAN Shisheng(Geological and Mineral Resource Exploration Institute of Guizhou Non-Ferrous Metal and Nucleus Industry Geological Bureau,Guizhou Guiyang 550005,China)
出处
《上海国土资源》
2021年第2期20-24,29,共6页
Shanghai Land & Resources
基金
贵州省财政专项资金(黔耕调2017-03)。
关键词
富锗土壤
地球化学特征
成因分析
黔东南州
germanium-rich soil
geochemical feature
genesis analysis
Qiandongnan prefecture
