First combined total reflection X-ray fluorescence and grazing incidence X-ray absorption spectroscopy characterization of aeolian dust archived in Antarctica and Alpine deep ice cores

Aeolian mineral dust archived in polar and mid latitude ice cores represents a precious proxy for assessing environmental and climatic variations at different timescales. In this respect, the identification of dust mineralogy plays a key role. In this work we performed the first preliminary X-ray ab...

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Bibliographic Details
Published in:Spectrochimica acta. Part B: Atomic spectroscopy 2008-12, Vol.63 (12), p.1503-1510
Main Authors: Cibin, G., Marcelli, A., Maggi, V., Sala, M., Marino, F., Delmonte, B., Albani, S., Pignotti, S.
Format: Article
Language:English
Subjects:
Aerosol
GI-XAS
Ice core
TXRF
XAS
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Summary:Aeolian mineral dust archived in polar and mid latitude ice cores represents a precious proxy for assessing environmental and climatic variations at different timescales. In this respect, the identification of dust mineralogy plays a key role. In this work we performed the first preliminary X-ray absorption spectroscopy (XAS) experiments on mineral dust particles extracted from Antarctic and from Alpine firn cores using grazing incidence geometry at the Fe K-edge. A dedicated high vacuum experimental chamber was set up for normal-incidence and total-reflection X-Ray Fluorescence and Absorption Spectroscopy analyses on minor amounts of mineral materials at the Stanford Synchrotron Radiation Laboratory. Results show that this experimental technique and protocol allows recognizing iron inclusion mineral fraction on insoluble dust in the 1–10 µg range.
ISSN:0584-8547
1873-3565
DOI:10.1016/j.sab.2008.10.012