Trace-element variations in an annually layered stalagmite as recorders of climatic changes and anthropogenic pollution in Central China | |
Tan, LC (Tan, Liangcheng)[ 1 ]; Shen, CC (Shen, Chuan-Chou)[ 2 ]; Cai, YJ (Cai, Yanjun)[ 1 ]; Lo, L (Lo, Li)[ 2 ]; Cheng, H (Cheng, Hai)[ 3 ]; An, ZS (An, Zhisheng)[ 1 ] | |
2014-03-15 | |
发表期刊 | Quaternary Research |
卷号 | 81期号:2页码:181-188 |
文章类型 | 期刊论文 |
摘要 | We analyzed variations in the Sr/Ca, Ba/Ca, REE/Ca (REE: rare earth element), Zn/Ca, and Pb/Ca ratios preserved in an annually layered stalagmite, XL21, from central China. The stalagmite record spans the 95 year period AD 1914–2008. The Sr/Ca and Ba/Ca ratios have a significant positive correlation with the stalagmite's growth rate, suggesting that they were primarily controlled by growth-rate variations. Variations in REE/Ca ratios are consistent with local temperature changes, suggesting temperature influenced REE concentrations in the stalagmite over decadal to annual timescales. Higher temperature in this humid area can increase vegetation cover, microbial activity, and organic decomposition in the soil, resulting in enhanced pCO2, organic matter concentration and reduced pH, and consequently increased REE mobilization from the overlying soil layer and host rock. Higher temperatures may also increase the natural Zn mobilization from the overlying soil mediated by organic matter and consequently may have led to increased Zn retention in XL21. An increasing trend is seen in the Pb/Ca ratios from XL21 since 1985, which is consistent with increased lead production in this area, and indicates an increase in mine-derived lead pollution in the local environment over the past 30 years. |
关键词 | Annually Layered Stalagmite Trace Elements Ree Geochemistry Climate Change Environmental Pollution Central China |
收录类别 | SCI ; EI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9788 |
专题 | 现代环境研究室 |
通讯作者 | Tan, LC (Tan, Liangcheng)[ 1 ] |
作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; 2.High-precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan; 3.Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China |
推荐引用方式 GB/T 7714 | Tan, LC ,Shen, CC ,Cai, YJ ,et al. Trace-element variations in an annually layered stalagmite as recorders of climatic changes and anthropogenic pollution in Central China[J]. Quaternary Research,2014,81(2):181-188. |
APA | Tan, LC ,Shen, CC ,Cai, YJ ,Lo, L ,Cheng, H ,&An, ZS .(2014).Trace-element variations in an annually layered stalagmite as recorders of climatic changes and anthropogenic pollution in Central China.Quaternary Research,81(2),181-188. |
MLA | Tan, LC ,et al."Trace-element variations in an annually layered stalagmite as recorders of climatic changes and anthropogenic pollution in Central China".Quaternary Research 81.2(2014):181-188. |
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