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| 江苏省土壤元素地球化学基准值 | |
| 引用本文： | 廖启林 刘,聪 许,艳 金,洋 吴昀昭 华,明 朱伯万 翁志华.江苏省土壤元素地球化学基准值[J].中国地质,2011,38(5):1363-1378. |
| 作者姓名： | 廖启林 刘 聪 许 艳 金 洋 吴昀昭 华 明 朱伯万 翁志华 |
| 作者单位： | 1. 江苏省地质调查研究院,江苏南京,210018 2. 江苏省国土资源厅,江苏南京,210029 3. 南京大学地理与海洋科学学院,江苏南京,210093 |
| 基金项目： | 国家自然科学基金(40873081); 江苏省人民政府与国土资源部合作项目(20031230008)资助 |
| 摘 要： | 土壤元素地球化学基准是指自然环境中土壤元素正常含量,属于土壤固有的化学组成与结构特征。江苏省现有国土面积约102 600 km2,至2007年已经完成全省1∶250 000多目标区域地球化学调查。按照4 km2采集1个样品、采样深度150～200 cm,16 km2分析测试1个组合样,共获得全省6 127个代表自然环境土壤之样品的52个元素与TOC含量的数据,剔除异常含量数据后,以平均含量代表全省土壤元素地球化学基准值、"基准值±1.5或2倍标准离差"表示元素基准值变化范围,获得了江苏省土壤52个元素及TOC的地球化学基准值,为土壤环境评价等提供了基础资料。结果表明:(1)全省土壤大多数元素含量数据不服从正态分布,但剔除异常数据后对平均含量影响不明显;(2)人为活动因素导致江苏土壤的Cd、Hg、Se、N等元素在地表20 cm以上深度发生显著富集,给建立土壤元素地球化学基准值增添了新的难度;(3)成土母质、土壤成因类型与地貌等差异是影响江苏土壤元素含量分布的基本要素。 |
| 关 键 词： | 元素地球化学基准值 土壤 江苏 |
Geochemical baseline values of elements in soil of Jiangsu Province |
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| LIAO Qi-lin,LIU Cong,XU Yan,JIN Yang,WU Yun-zhao,HUA Ming,ZHU Bai-wan,WENG Zhi-hua.Geochemical baseline values of elements in soil of Jiangsu Province[J].Chinese Geology,2011,38(5):1363-1378. | |
| Authors: | LIAO Qi-lin LIU Cong XU Yan JIN Yang WU Yun-zhao HUA Ming ZHU Bai-wan WENG Zhi-hua |
| Institution: | LIAO Qi-lin1,LIU Cong2,XU Yan3,JIN Yang1,WU Yun-zhao3,HUA Ming1,ZHU Bai-wan1,WENG Zhi-hua1(1.Geological Survey of Jiangsu Province,Nanjing 210018,Jiangsu,China,2.Jiangsu Department of Land and Resources,Nanjing 210029,3.School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210093,China) |
| Abstract: | Geochemical baseline values of elements mean their normal concentrations within the natural environmental soils and belong to a kind of inherent chemical compositions and structural characteristics related to primitive matter.The whole 1∶250 000 multi-target regional geochemistry survey of Quaternary sediments had been accomplished in Jiangsu Province by 2007,and a lot of geochemical data of soil samples were obtained.In this paper,data of 6 127 natural environmental soil samples containing total contents of 52 elements and total organic carbon(TOC) from Jiangsu were studied by statistical calculation,and the new geochemical baseline values about element contents in soil of Jiangsu are equivalent to the mean concentration ±1.5 or 2 Std.Deviation of every element from the above stated 6 127 samples by eliminating abnormal data is reported.The 6 127 samples cover about 102 600 km2 of the whole land of Jiangsu,and a soil sample per 16km2 was measured at the chemical laboratory,with every measured sample consisting of 4 samples collected from a unit of 4 km2 like a chessboard lattice,and all sampling depths being 150～200 cm or so.Some conclusions have been reached:First,most element contents are not in normal distribution,and the mean content from these elements does not change obviously after eliminating abnormal data.Second,anthropogenic input has apparently increased a part of contents of Cd,Hg,Se and N,etc.in topsoil above the depth of 20 cm,and it is necessary to exclude disturbance of anthropogenic activity to establish geochemical baseline value of soils.Third,parent matter,genetic classification of soils and topographic units are main factors affecting element content distribution within soil of Jiangsu,and the difference of normal concentrations of some elements are very obvious in soil of different areas.The information obtained by the authors will provide new clues and bases for assessing eco-environmental quality and establishing local standard of soil environment. |
| Keywords: | geochemical baseline soil Jiangsu Province |
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