Japan Geoscience Union Meeting 2016

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Oral

Symbol S (Solid Earth Sciences) » S-TT Technology & Techniques

[S-TT53] Contribution of luminescence dating to geosciences

Sun. May 22, 2016 1:45 PM - 3:15 PM 203 (2F)

Convener:*Saiko Sugisaki(Geological Survey of Japan, AIST), Toru Tamura(Institute of Geology and Geoinformation Geological Survey of Japan, AIST), Reisuke Kondo(Educational Development Center, Kogakkan University), Kazumi Ito(Geological Survey of Japan, AIST), Chair:Saiko Sugisaki(Geological Survey of Japan, AIST), Toru Tamura(Institute of Geology and Geoinformation Geological Survey of Japan, AIST)

3:00 PM - 3:15 PM

[STT53-06] Journey of sand grains from river to deep marine estimated from bleaching percentage (BLP) of feldspar grains

*Masaaki Shirai1 (1.Tokyo Metropolitan University)

Keywords:IRSL, bleaching, transport process

Optically stimulated luminescence has two remarkable properties, (1) the intensity of mineral grain luminescence increases with the amount of ionizing radiation absorbed by the grain; and (2) sufficient exposure to sunlight results in resetting of the luminescence signal (bleaching). Using these properties, evaluation for sand grain transport with the content of completely bleached grains (bleaching percentage: BLP) was established. Several case studies from riverine sand (Shirai et al., 2008; Shirai and Hayashizaki, 2013) to deep marine turbidite sand (Shirai and Hayashizaki, 2013) and sand grain transport processes inferred from these results are introduced.