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Hochstrasser-Petit Ch., Romanova L., Duchesne S., Melnichuk O., Gérard P. (2020). Yakut clothes of the 17th and 18th centuries, archaeology and restitution. (Vol. 4).
Abstract: 40 Frozen Yakutian Graves, From The 17th To The 19th Century Allow The Reconstitution Of Clothes. At The End Of the 17th Century, New Fashions Are Emerging With The Ostentatious Use Of Imported Goods And The Influences Of russian Noble Circles And Chinese And/or Mongol And/or Buriat Fashions. The Garment Does Not Only Seem To Be any More An Element Of Protection Against The Cold And A Utilitarian Object But Becomes A Way To Marking The Socialization of The Individual.
Programme: 1038
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Houstin A. (2020).
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. (2020). Geomagnetic core field models and secular variation forecasts for the 13th International Geomagnetic Reference Field (IGRF-13) (Vol. 72).
Keywords: Forecasts of the geomagnetic field Geomagnetic field models Geomagnetic secular variation The geomagnetic field
Programme: 139
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Isabelle Badenhausser, Lise Chambrin, Marc Lebouvier. (2020).
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. (2020). Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle.
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J Mathurin, E Dartois, C Engrand, J Duprat, A Deniset- Besseau, A Dazzi, Y Kebukawa, T Noguchi, D Troadec. (2020). Nanometre-scale infrared chemical imaging (AFM-IR) of organic matter in ultra-carbonaceous Antarctic micrometeorites (UCAMMS) and future analyses of Hayabusa 2 samples..
Abstract: Introduction: The chemical composition of organic matter (OM) in interplanetary samples (meteorites and micrometeorites) is suitably characterized by the distribution of the different chemical bonds using infrared (IR) vibrational spectroscopy (see e.g. [1]). Classical IR microscopy provides a global view of the dust grain chemical structure content but remains limited by the diffraction, with typical spot sizes sampling a few micrometers in the mid-IR range. This spatial resolution limitation is well above that of complementary techniques such as isotopic imaging with NanoSIMS or transmission electron or X-ray microscopy techniques. These techniques reveal mineralogical, chemical and isotopic heterogeneities at the sub-micron scale but do not give full access to the distribution of the various chemical bonds. The IR diffraction limitation can be circumvented by using AFM-IR microscopy. This technique opens a new window for studies of OM at ten to tens of nanometer scales and will be of importance for studies of the samples from carbonaceous asteroid Ryugu, returned by the Hayabusa 2 space probe in December 2020. AFM-IR is now a well-established microscopy technique in the vibrational field. It combines an atomic force microscope (AFM) and a tunable IR source to detect photo-thermal effect and access chemical information down to a nanoscale resolution [2]. This technique is now applied in a wide diversity of scientific fields [3], and was recently used to analyze extraterrestrial OM [4, 5]. We report here on recent results obtained on imaging two UltraCarbonaceous Antarctic MicroMeteorites (UCAMMs) using AFM-IR [5]. A small fraction of the Antarctic micrometeorites from the Concordia collection consists in UCAMMs, particles with extreme concentrations in OM, most of them exhibiting large deuterium excesses [6]. UCAMMs are also found in Japanese interplanetary dust collections [7-9]. These UCAMMs most likely originate from the surface of small icy bodies in the outer regions of the solar system [1,6,7,10]. The large OM fraction of UCAMMs (considerably higher than in the most carbon-rich meteorites) enables direct analyses without the pre-treatment generally applied to extract the OM from other meteoritic samples, and give access to unaltered chemical maps of the intimate association of minerals and organics.
Programme: 1120
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. (2020). Isotopic analyses of ion irradiation-induced organic residues, clues on the formation of organics from UCAMMS (Vol. 51).
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. (2020). The isotopic diversity of ultracarbonaceous Antarctic micrometeorites, a coupled nanosims and afmir study (Vol. 2326).
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. (2020). On the observation of magnetic events on broad-band seismometers (Vol. 72).
Keywords: Anthropogenic sources of magnetic noise Seismic instrumentation Sudden Storm Commencements
Programme: 133
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J. Jumelet, A. R. Klekociuk, S. P. Alexander, S. Bekki, A. Hauchecorne, J. P. Vernier, M. Fromm, P. Keckhut. (2020). Detection of Aerosols in Antarctica From Long-Range Transport of the 2009 Australian Wildfires (Vol. 125).
Keywords: aerosols Antarctica bushfires lidar
Programme: 209
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