Geochemical characteristics and ecological risk assessment of heavy metals in granitic magmatic soil: A case study of the Jiucheng-Jiemao area in Yingjiang County, Yunnan Province
XIAO Gao-Qiang1,2(), XIANG Long-Zhou3, DAI Da-Long1, GAO Xiao-Hong1, ZONG Qing-Xia3
1. Yunnan Institute of Geological Survey, Kunming 650216, China 2. Key Laboratory of Sanjing Metallogeny and Resources Exploration and Utilization, MNR, Kunming 650051, China 3. Yunnan Planning and Design Institute of Land and Resources, Kunming 650216, China
Based on 238 rock samples and 4,931 soil samples collected from the Jiucheng-Jiemao area of Yingjiang County, Yunnan Province, and compared with other geological units, this paper is focused on the study of geochemical characteristics and sources of heavy metals in granitic magmatic rocks and soils as well as ecological risk assessment of soil heavy metals. According to the results obtained, the granitic magmatic rocks and Gaoligongshan group(Pt1GL.)rocks have similar provenances or inheritances. The Pb content in the two kinds of rocks is higher than that in the upper crust, while the content of other heavy metals is lower. The soil heavy metal content and change characteristics of the Quaternary (Qa), Mangbang formation (N2m) and Gaoligongshan group (Pt1GL.) are basically the same as those of the granitic magmatic rock, which are significantly lower than the Quaternary (Qb) and Guanshang formation (D1g). Combined with lithologic compositions, the soil parent materials of the Quaternary (Qa), Mangbang formation (N2m) and Gaoligongshan group (Pt1GL.)may be mainly granitic magmatic rocks. The soil heavy metal values of the granitic magmatic rock and Guanshang formation (D1g) are mainly affected by natural sources, and the influence of human activities is little. The geoaccumulation index and the potential ecological risk index indicate that the granitic magmatic soil has a low ecological risk of heavy metals and is a clean soil.The soil-forming parent materials of farmland with the production function of grain, sugar, vegetable, etc. in Dehong Prefecture are mainly granitic magmatic rock, but related study work is insufficient. Through comparative research, it is believed that Dehong Prefecture has great potential in developing green and pollution-free food production.
肖高强, 向龙洲, 代达龙, 高晓红, 宗庆霞. 花岗质岩浆岩土壤重金属地球化学特征及生态风险评价——以云南盈江旧城—姐冒地区为例[J]. 物探与化探, 2021, 45(5): 1135-1146.
XIAO Gao-Qiang, XIANG Long-Zhou, DAI Da-Long, GAO Xiao-Hong, ZONG Qing-Xia. Geochemical characteristics and ecological risk assessment of heavy metals in granitic magmatic soil: A case study of the Jiucheng-Jiemao area in Yingjiang County, Yunnan Province. Geophysical and Geochemical Exploration, 2021, 45(5): 1135-1146.
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