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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

DOI: 10.1016/j.sab.2008.10.012 DOI Help

Authors: G. Cibin (Diamond Light Source) , A. Marcelli (Istituto Nazionale di Fisica Nucleare) , V. Maggi (Univ Milano Bicocca - DISAT, Italy) , M. Sala (Univ Milano Bicocca - DISAT, Italy) , F. Marino (Univ Milano Bicocca - DISAT, Italy) , B. Delmonte (Univ Milano Bicocca - DISAT, Italy) , S. Albani (Univ Milano Bicocca - DISAT, Italy) , S. Pignotti (IMONT - EIM, Italy)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Spectrochimica Acta Part B: Atomic Spectroscopy , VOL 63 (12) , PAGES 1503-1510

State: Published (Approved)
Published: December 2008

Abstract: 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.

Journal Keywords: TXRF; Xas; Aeolian Dust; Deep Ice Cores

Subject Areas: Environment, Technique Development

Facility: SSRL