[H-QR06] Luminescence and ESR: Applications to Dating and Earth Surface Processes

[HQR06-P04] ²²⁸Ra/²²⁶Ra in the present-day hydrothermal fluid: a method to estimate the contribution from extinct ²²⁸Ra

*Shin Toyoda¹, Jun-ichiro Ishibashi², Tatsuo Nozaki³ (1. Institute of Paleontology and Geochronology, Okayama University of Science, 2. Kobe Ocean Bottom Exploration Center, Kobe University, 3. School of Creative Science and Engineering, Waseda University)

Keywords:ESR dating, barite, sea-floor hydrothermal activity, Radium