AMS RADIOCARBON DATES OF PYROCLASTIC-FLOW DEPOSITS ON THE SOUTHERN SLOPE OF THE KUJU VOLCANIC GROUP, KYUSHU, JAPAN

被引：3

作者：

Okuno, Mitsuru ^{[1
,2
]}

Nagaoka, Shinji ^{[3
]}

Saito-Kokubu, Yoko ^{[4
]}

Nakamura, Toshio ^{[5
]}

Kobayashi, Tetsuo ^{[6
]}

机构：

[1] Fukuoka Univ, AIG Collaborat Res Inst Int Study Erupt Hist & In, Fukuoka 8140180, Japan

[2] Fukuoka Univ, Fac Sci, Dept Earth Syst Sci, Fukuoka 8140180, Japan

[3] Nagasaki Univ, Nagasaki 8528521, Japan

[4] Japan Atom Energy Agcy, Tono Geosci Ctr, 959-31 Jorinji, Toki, Gifu 5095102, Japan

[5] Nagoya Univ, Inst Space Earth Environm Res, Div Chronol Res, Nagoya, Aichi 4648601, Japan

[6] Kagoshima Univ, Kagoshima 8900065, Japan

来源：

RADIOCARBON | 2017年 / 59卷 / 02期

基金：

日本学术振兴会;

关键词：

Kuju volcanic group; AMS radiocarbon dating; pyroclastic-flow deposits; lava dome;

D O I：

10.1017/RDC.2016.66

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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 C-14 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 similar 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.

引用

页码：483 / 488

页数：6

共 9 条

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