IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Rare earth element patterns in a Chinese stalagmite controlled by sources and scavenging from karst groundwater
Zhou, HY (Zhou, Houyun)1,2,3; Greig, A (Greig, Alan)4; Tang, J (Tang, Jing)1; You, CF (You, Chen-Feng)5; Yuan, DX (Yuan, Daoxian)3; Tong, XN (Tong, Xiaoning)1; Huang, Y (Huang, Ying)1
2012-04-15
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
Volume83Pages:1-8
Subtype期刊论文
Abstract

The rare earth elements and yttrium (REY) in a Chinese stalagmite (SJ3) have been studied to delineate their possible sources and controlling mechanisms. The following results are obtained: (1) The REY in karst groundwater at the study site have very low concentrations, e. g. ranging from 59 x 10(-6) to 614 x 10(-6) mu mol/L for La, and are transported predominantly in particle/colloidal phases. These elements show a high linear positive correlation with Fe, Mn and Al (r(2) = 0.98, 0.95 and 0.91, respectively), which are also transported largely in particle/colloidal phases, suggesting a close association of REY with Fe, Mn and Al in colloidal/particle phases; (2) REY mobilization from the sources, i.e. the limestone host rock and the overlying soil layer, may not have exerted a significant influence on the REY patterns for SJ3 including anomalies of La, Ce and Y and fractionation between light and heavy REY; (3) The REY patterns of SJ3 display significant variations which are controlled in part by change in contributions from the limestone host rock and the overlying soil layer and can be associated with stadial-interstadial changes in past climate and environment. The REY contribution from the overlying soil layer is higher under a warm-humid climate phase than a cold-dry one and the REY contribution from the limestone host rock is reversed; (4) Some of the variations of the SJ3 REY patterns could not be explained with a simple mixing of different REY sources. Removal of REY from the groundwater in association with precipitation of colloidal and particle materials, an analogue to REY scavenging from seawater, is the most important mechanism influencing the SJ3 REY patterns. Strong REY "scavenging", which may be caused by both less dynamic hydrology, longer travel-time and increased ionic strength of karst groundwater, is suggested to be responsible for the large positive Y anomalies and negative Ce anomalies and depletion of light REE relative to heavy REE during the cold-dry climate phases (e. g. the periods corresponding to the last glacial maximum and Heinrich event 1).

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10180
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorZhou, HY (Zhou, Houyun)1,2,3
Affiliation1.School of Geography, South China Normal University, Guangzhou 510631, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
3.School of Geographical Science, Southwest University, Chongqing 400715, China;
4.Department of Earth Sciences, University of Melbourne, Victoria 3010, Australia;
5.The Earth Dynamic System Research Center, National Cheng-Kung University, Tainan 701, Taiwan, ROC
Recommended Citation
GB/T 7714
Zhou, HY ,Greig, A ,Tang, J ,et al. Rare earth element patterns in a Chinese stalagmite controlled by sources and scavenging from karst groundwater[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2012,83:1-8.
APA Zhou, HY .,Greig, A .,Tang, J .,You, CF .,Yuan, DX .,...&Huang, Y .(2012).Rare earth element patterns in a Chinese stalagmite controlled by sources and scavenging from karst groundwater.GEOCHIMICA ET COSMOCHIMICA ACTA,83,1-8.
MLA Zhou, HY ,et al."Rare earth element patterns in a Chinese stalagmite controlled by sources and scavenging from karst groundwater".GEOCHIMICA ET COSMOCHIMICA ACTA 83(2012):1-8.
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