Japan Geoscience Union Meeting 2014

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Poster

Symbol M (Multidisciplinary and Interdisciplinary) » M-TT Technology & Techniques

[M-TT42_2PO1] Frontiers in Geochemistry : Innovative approaches for Earth and Planetary Sciences

Fri. May 2, 2014 4:15 PM - 5:30 PM Poster (3F)

Convener:*Yokoyama Yusuke(Atmosphere and Ocean Research Institute, University of Tokyo), Hiroyuki Kagi(Geochemical Laboratory, Graduate School of Science, University of Tokyo), Shogo Tachibana Shogo(Department of Natural History Scieces, Hokkaido University), Takafumi Hirata(Graduate School of Science, Kyoto University), Urumu Tsunogai(Graduate School of Environmental Studies, Nagoya University), Katsuhiko Suzuki(Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology), Gen Shimoda(Geological Survey of Japan, AIST), Hirochika Sumino(Geochemical Research Center, Graduate School of Science, University of Tokyo), Hajime Obata(Marine inorganic chemistry division, Atmosphere and Ocean Research Institute, University of Tokyo), Yoshio Takahashi(Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University), Tetsuya Yokoyama(Department of Earth and Planetary Sciences, Graduate School of Science and Engineering, Tokyo Institute of Technology)

4:15 PM - 5:30 PM

[MTT42-P06] Improved 10Be preparation to reduce analytical background for earth surface process studies

*Masako YAMANE1, Yusuke YOKOYAMA2, Yosuke MIYAIRI2, Kazuho HORIUCHI3, Hiroyuki MATSUZAKI4 (1.JAMSTEC, 2.AORI, Univ. Tokyo, 3.Hirosaki Univ., 4.Grad. Sch. Eng., Univ. Tokyo)

Keywords:beryllium-10, background, earth surface process, Accerelator Mass Spectrometry

Due to advancement of Accerelator Mass Spectrometry (AMS), in situ produced beryllium-10 (10Be) in quartz has been used for earth surface process studies, such as surface exposure dating (e.g. Yamane et al., 2011), erosion rate estimations (e.g. Shiroya et al., 2012), tectonic processes (Yokoyama et al., 2005) and so forth (e.g. Gosse and Phillips, 2001). In order to expand the applicability of this technique, the sample with low 10Be concentration need to be measured with high precision. This requires reduction of background that is often affected isobars (boron-10). We have conducted several attempts and found that the length of time exposed to the ambient atmosphere during the oxidization process is the most important step to increase 10Be background (Yokoyama et al., submitted). In this presentation, we discussed our experimental results and potential improvement of topics for understanding of earth surface process.