Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology

Simple item page
dc.contributor.authorRutlidge, Hen_AU
dc.contributor.authorBaker, AAen_AU
dc.contributor.authorMarjo, CEen_AU
dc.contributor.authorAndersen, MSen_AU
dc.contributor.authorGraham, PWen_AU
dc.contributor.authorCuthbert, MOen_AU
dc.contributor.authorJex, CNen_AU
dc.contributor.authorRau, GCen_AU
dc.contributor.authorRoshan, Hen_AU
dc.contributor.authorMarkowska, Men_AU
dc.contributor.authorMariethoz, Gen_AU
dc.date.accessioned2016-10-25T01:37:17Zen_AU
dc.date.available2016-10-25T01:37:17Zen_AU
dc.date.issued2014-06-15en_AU
dc.date.statistics2016-09-25en_AU
dc.description.abstractA 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 humic-like 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. © 2014, Elsevier Ltd.en_AU
dc.identifier.citationRutlidge, H., Baker, A., Marjo, C. E., Andersen, M. S., Graham, P. W., Cuthbert, M. O., Rau, G. C., Roshan, H., Markowska, M., Mariethoz, G., & Jex, C. 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. doi: doi:10.1016/j.gca.2014.03.036en_AU
dc.identifier.govdoc7404en_AU
dc.identifier.issn0016-7037en_AU
dc.identifier.journaltitleGeochimica Et Cosmochimica Actaen_AU
dc.identifier.pagination217-230en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.gca.2014.03.036en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7881en_AU
dc.identifier.volume135en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCavesen_AU
dc.subjectNew South Walesen_AU
dc.subjectElementsen_AU
dc.subjectOrganic matteren_AU
dc.subjectSoilsen_AU
dc.subjectLimestoneen_AU
dc.titleDripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatologyen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles