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Condens. Matter 2018, 3(3), 25; https://doi.org/10.3390/condmat3030025

The Contribution of Synchrotron Light for the Characterization of Atmospheric Mineral Dust in Deep Ice Cores: Preliminary Results from the Talos Dome Ice Core (East Antarctica)

1
Environmental and Earth Sciences Department, University Milano-Bicocca, 20126 Milano, Italy
2
Milano-Bicocca Section, Istituto Nazionale di Fisica Nucleare, 20126 Milano, Italy
3
Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
4
Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, 00044 Frascati, Italy
5
RICMASS, Rome International Center for Materials Science Superstripes, 00185 Roma, Italy
6
Department of Physical, Earth and Environmental Sciences, University of Siena, 53100 Siena, Italy
7
Department of Mathematics and Physics, University Roma-Tor Vergata, 00133 Rome, Italy
*
Author to whom correspondence should be addressed.
Received: 4 July 2018 / Revised: 17 August 2018 / Accepted: 26 August 2018 / Published: 28 August 2018
(This article belongs to the Special Issue Condensed Matter Researches in Cryospheric Science)
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Abstract

The possibility of finding a stratigraphically intact ice sequence with a potential basal age exceeding one million years in Antarctica is giving renewed interest to deep ice coring operations. But the older and deeper the ice, the more impactful are the post-depositional processes that alter and modify the information entrapped within ice layers. Understanding in situ post-depositional processes occurring in the deeper part of ice cores is essential to comprehend how the climatic signals are preserved in deep ice, and consequently how to construct the paleoclimatic records. New techniques and new interpretative tools are required for these purposes. In this respect, the application of synchrotron light to microgram-sized atmospheric dust samples extracted from deep ice cores is extremely promising. We present here preliminary results on two sets of samples retrieved from the Talos Dome Antarctic ice core. A first set is composed by samples from the stratigraphically intact upper part of the core, the second by samples retrieved from the deeper part of the core that is still undated. Two techniques based on synchrotron light allowed us to characterize the dust samples, showing that mineral particles entrapped in the deepest ice layers display altered elemental composition and anomalies concerning iron geochemistry, besides being affected by inter-particle aggregation. View Full-Text
Keywords: atmospheric mineral dust; ice core; Antarctica; paleoclimate; synchrotron radiation; X-ray absorption near edge spectroscopy; X-ray fluorescence; iron geochemistry atmospheric mineral dust; ice core; Antarctica; paleoclimate; synchrotron radiation; X-ray absorption near edge spectroscopy; X-ray fluorescence; iron geochemistry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Baccolo, G.; Cibin, G.; Delmonte, B.; Hampai, D.; Marcelli, A.; Di Stefano, E.; Macis, S.; Maggi, V. The Contribution of Synchrotron Light for the Characterization of Atmospheric Mineral Dust in Deep Ice Cores: Preliminary Results from the Talos Dome Ice Core (East Antarctica). Condens. Matter 2018, 3, 25.

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