Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-05T02:34:47.071Z Has data issue: false hasContentIssue false
  • English
  • Français

AMS Radiocarbon Dates of Pyroclastic-Flow Deposits on the Southern Slope of the Kuju Volcanic Group, Kyushu, Japan

Published online by Cambridge University Press:  07 November 2016

Mitsuru Okuno ,
Shinji Nagaoka ,
Yoko Saito-Kokubu ,
Toshio Nakamura  and
Tetsuo Kobayashi
Mitsuru Okuno*
Affiliation:
AIG Collaborative Research Institute for International Study on Eruptive History and Informatics; also Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka 814-0180, Japan
Shinji Nagaoka
Affiliation:
Formerly Nagasaki University, Nagasaki 852-8521, Japan (passed away on 10 July 2011)
Yoko Saito-Kokubu
Affiliation:
Tono Geoscience Center, Japan Atomic Energy Agency, 959-31 Jorinji, Toki, Gifu 509-5102, Japan
Toshio Nakamura
Affiliation:
Division for Chronological Research, Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan
Tetsuo Kobayashi
Affiliation:
Emeritus Professor, Kagoshima University, Kagoshima 890-0065, Japan
*
*Corresponding author. Email: [email protected].
Get access Rights & Permissions [Opens in a new window]

Abstract

The Kuju volcanic group, located in central Kyushu, Japan, consists of small stratovolcanoes and lava domes. To refine the eruptive history of the group, we conducted accelerator mass spectrometry (AMS) radiocarbon dating of charcoal fragments from three pyroclastic-flow (PF) deposits on the southern slope. The obtained 14C dates are consistent with the geomorphology, stratigraphy, and thermoluminescence (TL) ages. The Handa PF deposits, which are products of the largest eruption of the group, were dated to ~53.5 ka BP. The Shirani and Muro PF deposits, which are block-and-ash flows, were dated to 44 to >50 cal ka BP and 35–39 cal ka BP, respectively. These ages can be correlated with TL ages for lava domes. This study demonstrates that the lava domes and associated PF deposits formed after the Handa eruption.

Keywords

Kuju volcanic groupAMS radiocarbon datingpyroclastic-flow depositslava dome
Type
Cosmogenic Isotopes in Studies of Soil Dynamics
Information
Radiocarbon , Volume 59 , Special Issue 2: Proceedings of the 22nd International Radiocarbon Conference (Part 1 of 2) , April 2017 , pp. 483 - 488
Copyright
© 2016 by the Arizona Board of Regents on behalf of the University of Arizona 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Selected Papers from the 2015 Radiocarbon Conference, Dakar, Senegal, 16–20 November 2015

References

REFERENCES

Kamata, H, Kobayashi, T. 1997. The eruptive rate and history of Kuju volcano in Japan during the past 15,000 years. Journal of Volcanology and Geothermal Research 76:163–171.CrossRefGoogle Scholar
Kawanabe, Y, Hoshizumi, H, Itoh, J, Kamata, H. 1997. Tephra stratigraphy of the Kuju volcano before K-Ah tephra. Programme and Abstracts the Volcanological Society of Japan 1997. Volume 2. p 105. In Japanese.Google Scholar
Kawanabe, Y, Hoshizumi, H, Itoh, J, Yamasaki, S. 2015. Geological map of Kuju Volcano. Geological Map of Volcanoes, no. 19. Geological Survey of Japan, AIST. In Japanese with English abstract.Google Scholar
Kitagawa, H, Masuzawa, T, Nakamura, T, Matsumoto, E. 1993. A batch preparation method for graphite targets with low background for AMS 14C measurements. Radiocarbon 35(2):295–300.CrossRefGoogle Scholar
Nagaoka, S, Okuno, M. 2014. Tephra-stratigraphy of Kuju volcano in southwestern Japan. Earth Monthly (Gekkan Chikyu) 36(8):281–296. In Japanese.Google Scholar
Nagaoka, S, Okuno, M. 2015. Eruptive history of Kuju volcanic group, SW Japan. Transaction of Japanese Geomorphological Union 36(3):141–158. In Japanese with English abstract.Google Scholar
Newhall, CG, Self, S. 1982. The volcanic explosivity index (VEI): an estimate of explosive magnitude for historical volcanism. Journal of Geophysical Research 87(C2):1231–1238.CrossRefGoogle Scholar
Ohta, T. 1991. The evolutional history of the eastern and the central area of Kuju volcano group. Journal of Petrology, Mineralogy and Economic Geology 86:243–263. In Japanese with English abstract.CrossRefGoogle Scholar
Okuno, M, Nakamura, T, Kamata, H, Ono, K, Hoshizumi, H. 1998. AMS 14C age of the Handa pyroclastic-flow deposit from Kuju volcano, Japan. Bulletin of Volcanological Society of Japan 43(2):75–79. In Japanese.Google Scholar
Okuno, M, Takashima, I, Nagaoka, S, Aizawa, J, Inenaga, K, Imazato, H, Obuchi, S, Fukimoto, S, Kaneda, H, Kobayashi, T. 2013. Thermoluminescence dates for the middle and western parts of Kuju volcano, Kyushu, SW Japan. Earth Monthly (Gekkan Chikyu) 62:32–36. In Japanese.Google Scholar
Reimer, PJ, Bard, E, Bayliss, A, Beck, JW, Blackwell, PG, Bronk Ramsey, C, Buck, CE, Cheng, H, Edwards, RL, Friedrich, M, Grootes, PM, Guilderson, TP, Haflidason, H, Hajdas, I, Hatté, C, Heaton, TJ, Hoffmann, DL, Hogg, AG, Hughen, KA, Kaiser, KF, Kromer, B, Manning, SW, Niu, M, Reimer, RW, Richards, DA, Scott, EM, Southon, JR, Staff, RA, Turney, CSM, van der Plicht, J. 2013. IntCal13 and Marine13 radiocarbon age calibration curves 0–50,000 years cal BP. Radiocarbon 55(4):1869–1887.CrossRefGoogle Scholar
Saito-Kokubu, Y, Matsubara, A, Miyake, M, Nishizawa, A, Ohwaki, Y, Nishio, T, Sanada, K, Hanaki, T. 2015. Progress on multi-nuclide AMS of JAEA-AMS-TONO. Nuclear Instruments and Methods in Physics Research B 361:48–53.CrossRefGoogle Scholar
Sakaguchi, T, Yuhara, M, Yamasaki, K, Takashima, I, Okuno, M. 2015. Thermoluminesence age and whole-rock chemical compositions of Kami-Yuzawa, Shimo-Yuzawa and Mimata-Gairinzan lavas and Matsunodai debris avalanche deposit, Kuju volcanic group, central Kyushu, Japan. Fukuoka University Science Reports 45(2):47–62. In Japanese with English abstract.Google Scholar
Stuiver, M, Reimer, PJ. 1993. Extended 14C data base and revised CALIB 3.0 14C age calibration program. Radiocarbon 35(1):215–230.CrossRefGoogle Scholar