Arid
DOI10.1016/j.gca.2014.03.036
Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology
Rutlidge, Helen1,2,6; Baker, Andy2,6; Marjo, Christopher E.1; Andersen, Martin S.3,6; Graham, Peter W.2; Cuthbert, Mark O.3,4; Rau, Gabriel C.3,6; Roshan, Hamid3,6; Markowska, Monika2,5,6; Mariethoz, Gregoire2,6; Jex, Catherine N.2,6
通讯作者Baker, Andy
来源期刊GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
EISSN1872-9533
出版年2014
卷号135页码:217-230
英文摘要

A series of four short-term infiltration experiments which revealed hydrochemical responses relevant to semi-arid karst environments were carried out above Cathedral Cave, Wellington, New South Wales (NSW), Australia. Dripwater samples were collected at two sites for trace element and organic matter analysis. Organic matter was characterised using fluorescence and interpreted using a PARAFAC model. Three components were isolated that represented unprocessed, soil-derived humiclike and fulvic-like material, processed humic/fulvic-like material and tryptophan-like fluorescence. Principal Component Analysis (PCA) performed on the entire dataset comprising trace element concentrations and PARAFAC scores revealed two dominant components that were identified as soil and limestone bedrock. The soil component was assigned based on significant contributions from the PARAFAC scores and additionally included Ba, Cu, Ni and Mg. The bedrock component included the expected elements of Ca, Mg and Sr as well as Si. The same elemental behaviour was observed in recent stalagmite growth collected from the site. Our experiments demonstrate that existing paleoclimate interpretations of speleothem Mg and Sr, developed in regions of positive water balance, are not readily applicable to water limited environments. We provide a new interpretation of trace element signatures unique to speleothems from water limited karst environments. (C) 2014 Elsevier Ltd. All rights reserved.


类型Article
语种英语
国家Australia ; England
收录类别SCI-E
WOS记录号WOS:000335656900011
WOS关键词DUST DEPOSITS ; CAVE ; FLUORESCENCE ; VARIABILITY ; WATERS ; STALAGMITES ; COMPONENTS ; AUSTRALIA ; BEHAVIOR ; OCEAN
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/182220
作者单位1.UNSW Australia, Mark Wainwright Analyt Ctr, Solid State & Elemental Anal Unit, Kensington, NSW 2052, Australia;
2.UNSW Australia, Connected Waters Initiat Res Ctr, Kensington, NSW 2052, Australia;
3.UNSW Australia, Connected Waters Initiat Res Ctr, Manly Vale, NSW 2093, Australia;
4.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England;
5.Australian Nucl Sci & Technol Org, Lucas Heights, NSW 2234, Australia;
6.Natl Ctr Groundwater Res & Training, Bedford Pk, SA, Australia
推荐引用方式
GB/T 7714
Rutlidge, Helen,Baker, Andy,Marjo, Christopher E.,et al. Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology[J],2014,135:217-230.
APA Rutlidge, Helen.,Baker, Andy.,Marjo, Christopher E..,Andersen, Martin S..,Graham, Peter W..,...&Jex, Catherine N..(2014).Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology.GEOCHIMICA ET COSMOCHIMICA ACTA,135,217-230.
MLA Rutlidge, Helen,et al."Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology".GEOCHIMICA ET COSMOCHIMICA ACTA 135(2014):217-230.
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