Geochemistry of eolian dust and its elemental contribution to Lake Qinghai sediment | |
Wan, DJ (Wan, Dejun)[1,2]; Jin, ZD (Jin, Zhangdong)[1]; Wang, YX (Wang, Yinxi)[3] | |
2012-08-01 | |
发表期刊 | APPLIED GEOCHEMISTRY |
卷号 | 27期号:8页码:1546-1555 |
文章类型 | 期刊论文 |
摘要 | Located at the midpoint of the Asian "airborne dust corridor'', Lake Qinghai receives substantial dust annually, which may impact the biogeochemical cycles of the system. In order to determine quantitatively the flux and chemical contributions of dust to Lake Qinghai sediment, dust samples were collected monthly at two sites surrounding the lake from June 2009 to May 2011. The results demonstrate similar chemical compositions of dust samples to the local loess, implying strong representativeness of regional dust. The average dust deposition flux is 265.7 +/- 55.0 g/m(2)/a, constituting 56.6 +/- 11.7% of the modern sediment, approximating to previous estimates (similar to 65%). Contributions of dust-derived elements in the sediment differ substantially, with a minimum of 16.7% for Sr and a maximum of 83.9% for Cu. Among these elements, the contribution of lithophile elements (Na, Al, K, Ti, Mn, Fe and Rb) is close to that of the bulk dust; the contributions of mobile elements (Mg, Ca and Sr) are low, only 16.7% (Sr)-26.1% (Mg), whereas potentially harmful metals (Cu, Zn and Pb) have high contributions (70.3-83.9%). Seasonal variations of elemental inputs indicate that springtime contributions dominate the annual dust fluxes for all elements into the sediment, in agreement with the high dust flux in spring. These observations not only quantify the contribution of dust to the sediment of Lake Qinghai, but also highlight the important role of dust in the accumulation of various elements in the sediment, especially for potentially harmful metals. |
DOI | 10.1016/j.apgeochem.2012.03.009 |
收录类别 | SCI ; EI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10111 |
专题 | 加速器质谱中心 |
通讯作者 | Jin, ZD (Jin, Zhangdong)[1] |
作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 10 South Fenghui Road, Xi’an 710075, China; 2.Graduate School, Chinese Academy of Sciences, Beijing 100039, China; 3.Center of Modern Analysis, Institute of Surficial Geochemistry, Nanjing University, Nanjing 210093, China |
推荐引用方式 GB/T 7714 | Wan, DJ ,Jin, ZD ,Wang, YX . Geochemistry of eolian dust and its elemental contribution to Lake Qinghai sediment[J]. APPLIED GEOCHEMISTRY,2012,27(8):1546-1555. |
APA | Wan, DJ ,Jin, ZD ,&Wang, YX .(2012).Geochemistry of eolian dust and its elemental contribution to Lake Qinghai sediment.APPLIED GEOCHEMISTRY,27(8),1546-1555. |
MLA | Wan, DJ ,et al."Geochemistry of eolian dust and its elemental contribution to Lake Qinghai sediment".APPLIED GEOCHEMISTRY 27.8(2012):1546-1555. |
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Geochemistry of eoli(1116KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
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