基于地质大数据技术对云南土壤重金属地质高背景区的划定

肖高强, 赵娟, 陈子万, 宋旭锋, 朱能刚

Delineation of areas with high geological background values of heavy metals in soils in Yunnan Province, China based on geological big data technology

XIAO Gao-Qiang, ZHAO Juan, CHEN Zi-Wan, SONG Xu-Feng, ZHU Neng-Gang

表3 土壤重金属地质高背景区水系沉积物中重金属中位值统计

Table 3 Statistical results of median value of heavy metals in stream sediments in high geological background areas 10-6

岩性组合 As Cd Cr Cu Hg Ni Pb Zn 碳酸盐岩 33.0 0.48 156 62.1 0.126 77.1 39.6 134 碳酸盐岩与(含煤)碎屑岩并层 16.9 0.37 159 72.7 0.078 66.1 31.2 121 碳酸盐岩与基性火山岩并层 14.7 0.19 160 61.3 0.061 71.4 22.5 103 含煤碎屑岩 6.10 0.20 210 128 0.038 75.5 20.7 122 含基性组分碎屑岩 7.30 0.20 224 89.8 0.040 78.0 22.0 116 基性—超基性火山岩 6.00 0.20 141 179 0.045 67.1 22.0 131 中基性侵入岩 9.20 0.25 103 90.6 0.062 65.0 18.7 135 超标风险评价值 40 0.30 150 50 1.80 70 90 200