Integrating the Holocene tephrostratigraphy for East Asia using a high-resolution cryptotephra study from Lake Suigetsu (SG14 core), central Japan

QUATERNARY SCIENCE REVIEWS

卷:183

Article

McLean, Danielle¹  Albert, Paul G.¹  Nakagawa, Takeshi^2,3  Staff, Richard A.^1,4  Yamada, Keitaro⁵  Kitaba, Ikuko²  Haraguchi, Tsuyoshi⁶  Kitagawa, Junko⁷  Smith, Victoria C.¹ 

[1] Univ Oxford, Res Lab Archaeol & Hist Art, Oxford OX1 3TG, England

[2] Ritsumeikan Univ, Res Ctr Palaeoclimatol, Kyoto 6038577, Japan

[3] Tokyo Metropolitan Univ, Dept Geog, Tokyo 1920397, Japan

[4] Univ Glasgow, Scottish Univ Environm Res Ctr, E Kilbride G75 0QF, Lanark, Scotland

[5] Kyoto Univ, Inst Geothermal Sci, Kusatsu 5258577, Japan

[6] Osaka City Univ, Osaka 5588585, Japan

[7] Fukui Prefectural Satoyama Satoumi Res Inst, Wakasa 9191331, Japan

关键词: Tephrochronology;    Cryptotephra;    Lake Suigetsu;    Japan;    Eastern Asia;    Changbaishan;    Ulleungdo;    Holocene;    Palaeoclimatology;    Lacustrine;   

DOI  :  10.1016/j.quascirev.2017.12.013

来源: Elsevier

【 摘 要 】

Tephra (volcanic ash) layers have the potential to synchronise disparate palaeoenvironmental archives on regional to hemispheric scales. Highly productive arc regions, like those in East Asia, offer a considerable number of widespread isochrons, but before records can be confidently correlated using these layers, a refined and integrated framework of these eruptive events is required. Here we present the first high resolution Holocene cryptotephra study in East Asia, using the Lake Suigetsu sedimentary archive in central Japan. The Holocene tephrostratigraphy has been extended from four to twenty ash layers using cryptotephra extraction techniques, which integrates the deposits from explosive eruptions from North Korea/China, South Korea and along the Japanese arc. This Lake Suigetsu tephrostratigraphy is now the most comprehensive record of East Asian volcanism, and the linchpin site for correlating sequences across this region. Major element glass geochemical compositions are presented for the tephra layers in the sequence, which have been compared to proximal datasets to correlate them to their volcanic source and specific eruptions. This study has significantly extended the ash dispersal of many key Holocene marker layers, and has identified the first distal occurrence of isochrons from Ulleungdo and Chang-baishan volcanoes. Utilising the high-precision Lake Suigetsu chronology, we are able to provide constrained eruption ages for the tephra layers, which can be transferred into other site-specific age models containing these markers. This new framework indicates that several isochrons stratigraphically bracket abrupt climate intervals in Japan, and could be used to precisely assess the regional and hemispheric synchronicity of these events. (C) 2018 Elsevier Ltd. All rights reserved.

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