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4 土壤重金属地质高背景区水系沉积物中重金属超标比例统计

Table 4 Statistical results of the proportion of heavy metals exceeding the screening value in stream sediments in high geological background areas %

岩性组合 样品数/个 As Cd Cr Cu Hg Ni Pb Zn 碳酸盐岩 6664 40.19 64.33 53.24 68.01 0.48 59.11 8.55 24.94 碳酸盐岩与(含煤)碎屑岩并层 6452 22.74 59.21 54.51 74.50 0.14 43.60 5.10 11.21 碳酸盐岩与基性火山岩并层 799 12.64 24.16 54.69 66.08 0.50 51.81 3.25 3.00 含煤碎屑岩 909 10.56 23.10 81.85 87.35 0.11 65.24 2.20 4.40 含基性组分碎屑岩 897 5.57 24.41 76.81 96.43 0.00 66.33 1.23 2.23 基性—超基性火山岩 4758 3.40 28.35 45.06 94.43 0.04 43.32 2.40 2.84 中基性侵入岩 256 5.47 36.33 17.58 83.59 0.00 41.41 3.91 11.72 总计 20735 22.03 49.05 53.65 78.29 0.23 50.74 5.21 12.70