新疆若羌县绿洲区富锗土壤地球化学特征及成因分析

Geochemical Features of Germanium-rich Soils and Its Causes in Oasis Region of Ruoqiang County, Xinjiang

通过开展1∶25万土地质量地球化学调查,发现新疆若羌县富锗土壤面积约135.06 km2,占采样点控制面积的9.3%。研究区表层土壤中锗含量为0.72~1.60 mg kg-1,平均值为1.16 mg kg-1,略高于世界土壤锗的平均含量。表层土壤中锗元素表现出明显的空间分布规律,在水平上主要以片状分布在研究区的南部,零星分布在研究区的北部。研究区不同的成土母质、土壤类型、土地利用类型对土壤中锗含量均有不同程度的影响。

Base on the 1 ： 250000 land quality geochemical survey, the areas of germanium-rich soils in Ruoqiang County of Xinjiang were about 135.06 km2, accounting for 9.3% of soil sample＇s controlling area. The germanium content in surface soil ranged from 0.72 to 1.60 mg kg-1, with an average of 1.16 mg kg-1, which was slightly higher than that in the world. Soil germanium showed a significant spatial distribution. Horizontally, germanium-rich soils were mainly distributed in the southern part of the study area with plaque shapes and sporadically distributed in the north. Different parent materials, soil types and land use types had certain degree influences on soil germanium.