连云港藤花落遗址土壤粒度及重金属累积特征
作者简介:周 华(1980-),男,贵州贵阳人,博士研究生,主要从事土地利用与区域经济发展研究工作。E-mail:bilyhua@163.com
收稿日期: 2012-04-05
要求修回日期: 2012-06-10
网络出版日期: 2013-01-31
基金资助
国家自然科学基金(41001047)资助
Characteristics of Soil Grain Size and Heavy-metal Accumulation of the Tenghualuo Site in Lianyungang, Jiangsu Province
Received date: 2012-04-05
Request revised date: 2012-06-10
Online published: 2013-01-31
Copyright
周华 , 廖富强 , 徐明星 , 周生路 , 吴绍华 . 连云港藤花落遗址土壤粒度及重金属累积特征[J]. 地理科学, 2013 , 33(3) : 349 -355 . DOI: 10.13249/j.cnki.sgs.2013.03.349
The Neolithic Tenghualuo Site in Lianyungang, which belongs to Longshan period, is the first prehistory city of China with both inner and outer structure ever been discovered. According to the analysis on the heavy-metal accumulation and grain size of profile(L1) and agricultural production area profile(L2) in the city residential area, respectively, it was found that anthropogenic-related accumulation of heavy metals in soil already had occurred in Longshan period, but only appeared in the city residential area. Cu, Pb and Zn accumulated the most obvious, whose enrichment factor values are 1.91, 1.35 and 1.29 respectively. Compared with the discovery of bronze archaeology, it can be sure that Tenghualuo Site has been in Chalcolithic Age. Meanwhile, the research of soil grain size based on soil source components separation method revealed that the soil in residential area had relatively unique parent material because of city protection during 4 500-4 200 a B.P., large-scale or prolonged flooding events have occurred in agricultural production area during this period, by which the proportion of diluvium was 30%, and this may destroy agricultural production condition, and causes the heavy-metal accumulation decline, eventually lead to the entire civilization disappeared. The findings above show that although the city can protect original society, the changes of natural environment still have decisive influence on original agricultural production, which finally decided the vicissitude of prehistoric civilization.
Fig.1 Location of Tenghualuo Site, Lianyungang图1 藤花落遗址区位 |
Fig.2 Comparison of profiles L1 and L2 and their depth图2 L1和L2剖面比较及地层埋藏深度 |
Fig.3 Comparison of heavy metals of living area (L1) and agricultural production area (L2) in Tenghualuo site图3 藤花落遗址生活区(L1)及农业生产区(L2)土壤重金属对比 |
Table 1 Compariation of correlationships of soils heavy metals value after Ti normalization in each profiles in Longshan cultural layers表1 各剖面龙山文化层土壤重金属归一后相关性比较 |
元素 | 剖 面 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
L1 | L2 | ||||||||||
Ni/Ti | Cr/Ti | Cu/Ti | Pb/Ti | Zn/Ti | Ni/Ti | Cr/Ti | Cu/Ti | Pb/Ti | Zn/Ti | ||
Ni/Ti | 1 | 1 | |||||||||
Cr/Ti | 0.45 | 1 | 0.224 | 1 | |||||||
Cu/Ti | 0.267 | 0.067 | 1 | -0.564 | 0.188 | 1 | |||||
Pb/Ti | 0.15 | -0.15 | 0.567 | 1 | 0.018 | 0.539 | 0.248 | 1 | |||
Zn/Ti | 0.2 | 0.183 | 0.767* | 0.667* | 1 | 0.564 | 0.261 | -0.285 | 0.479 | 1 |
Table 2 The reference value, standard deviation and value range of enrichment factor in background of the 6 elements表2 江苏省5种元素基准值、标准差及自然背景下EF范围 |
元素 | 基准值(mg/kg)* | 标准差(mg/kg)* | EFbmax | EFbmin |
---|---|---|---|---|
Ni | 32.8 | 9 | 1.19 | 0.65 |
Cr | 75.6 | 3 | 1.32 | 0.83 |
Cu | 23.4 | 7.2 | 1.24 | 0.55 |
Pb | 22 | 6 | 1.19 | 0.65 |
Zn | 64.8 | 15.1 | 1.13 | 0.76 |
Ti | 4564 | 688 | - | - |
*数据来自文献[29];EF为无量纲数据。 |
Fig.4 Comparison of concentration and background value after Ti normalization of each element in two profiles图4 两剖面各元素含量与背景值归一化后比较 |
Fig. 5 Separation of the function of frequency density of different source components图5 各地层不同母质来源土壤粒度组份频数密度函数分离 |
The authors have declared that no competing interests exist.
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