Stratigraphy and Chronology of Widespread Tephra Beds Intercalated in the TKN-2004 Core Sediment Obtained from the Takano Formation, Central Japan

長橋, 良隆; 佐藤, 孝子; 竹下, 欣宏; 田原, 敬治; 公文, 富士夫

doi:10.4116/jaqua.46.305

Cited by 51 publications

(23 citation statements)

References 29 publications

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“…Given the stratigraphic constraints, the Koabiyama pyroclastic flow (Kob) from the Kikai caldera (Machida & Arai, ; Ono et al ., ) is the only candidate that can be correlated with layer A‐37‐07. The K–Ar age of Kob (140 ± 20 ka; Machida & Arai, ) is close to the eruption age of Aso‐3 (133 ka) based on stratigraphic relationships (Nagahashi et al ., ). However, the erupted volume of Kob is unknown, and Kob cannot be directly correlated with layer A‐37‐07 at present.…”

Section: Resultsmentioning

confidence: 97%

Major and trace element abundances in volcanic glass shards in visible tephras in SG93 and SG06 drillcore samples from Lake Suigetsu, central Japan, obtained using femtosecond LA–ICP–MS

Maruyama

Takemura

Hirata

et al. 2019

J Quaternary Science

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The major and trace element concentrations of volcanic glass shards from visible tephra layers in the SG93 and SG06 cores from Lake Suigetsu, central Japan, were determined by femtosecond laser ablation–inductively coupled plasma–mass spectrometry. The glass‐shard analyses, together with the petrographic properties of the tephra samples, allow the Suigetsu tephra layers to be broadly classified into tephras derived from calderas on Kyushu Island, and from Daisen and Sambe volcanoes in the Chugoku district of southwest Japan. The layers correlated with tephras from Kuju caldera and Daisen volcano, and with the younger Sambe tephras, have adakitic elemental features. A Suigetsu tephra sample correlated with the Sambe−Kisuki tephra based on petrographic properties has an elemental pattern similar to that of the Toya tephra from Hokkaido Island, northeast Japan. This match implies that tephras from northeast Japan, as well as Kyushu–Chugoku tephras, are possible correlatives of the Suigetsu tephra layers. Both petrographic properties and major–trace element data of volcanic glass shards are essential for robust tephra correlations, and hierarchical cluster analysis proved additionally useful in statistically evaluating relationships among the tephras.

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Section: Resultsmentioning

confidence: 97%

Major and trace element abundances in volcanic glass shards in visible tephras in SG93 and SG06 drillcore samples from Lake Suigetsu, central Japan, obtained using femtosecond LA–ICP–MS

Maruyama

Takemura

Hirata

et al. 2019

J Quaternary Science

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“…All of the tephra glasses examined in this study are clear and show no evidence of alteration [ Nagahashi et al ., ; Satoguchi and Nagahashi , ]. Most of the tephra glasses are rhyolitic (SiO 2 > 73 wt %), except for the tephras from the Aso caldera and Towada tephras including Nanko‐III (Figures a and b).…”

Section: Resultsmentioning

confidence: 99%

“…The number of identified widespread tephras over the Japan Islands that erupted during the last 5 Mys is limited to 80 (Figure ). Many other tephras occur in the sedimentary basins but they are yet to be correlated or are limited to local areas [ Machida and Arai , ; Nagahashi et al ., ; Satoguchi and Nagahashi , ]. Thus, in this study, 80 tephra samples collected from Lake Biwa, Ise, Kakegawa, Takano, Niigata, Kanto, and S‐Tohoku were analyzed.…”

Section: Late Cenozoic Tephras In Japanmentioning

confidence: 99%

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

Kimura

Nagahashi

Satoguchi

et al. 2015

Geochem Geophys Geosyst

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Dacitic to rhyolitic glass shards from 80 widespread tephras erupted during the past 5 Mys from calderas in Kyushu, and SW, central, and NE Japan were analyzed. Laser ablation inductively coupled plasma mass spectrometry was used to determine 10 major and 33 trace elements and A few tephras from SW Japan were identified as adakite and alkali rhyolite and were regarded to have originated from slab melt and mantle melt, respectively. The Pb isotope ratios of the tephras are comparable to those of the intermediate lavas in the source areas but are different from the basalts in these areas. The crustal assimilants for the intermediate lavas were largely from crustal melts and are represented by the rhyolitic tephras. A large heat source is required for forming large volumes of felsic crustal melts and is usually supplied by the mantle via basalt. Hydrous arc basalt formed by cold slab subduction is voluminous, and its heat transfer with high water content may have melted crustal rocks leading to effective felsic magma production. Coincidence of basalt and felsic magma activities shown by this study suggests caldera-forming eruptions are ultimately the effect of a mantle-driven cause.

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“…Pyrolysis gas chromatography mass spectrometry with in situ methylation with tetramethylammonium hydroxide (TMAH-thermochemolysis-GC/MS) was carried out using a Japan Analytical Industry JHP-5 Curie point pyrolyzer that was directly connected to the injection port of a Hewlett Packard 5973 gas chromatograph mass selective detector. The column used was a Chrompack CP- TKN-2004(Nagahashi et al, 2007. (Hedges and Parker, 1976;Hedges and Mann, 1979).…”

Section: Lignin and Fatty Acid Analysismentioning

confidence: 99%

“…2), associated with many marker tephra beds. An age-depth model was created using four volcanic ash layers by Nagahashi et al (2007) (Fig. 3).…”

Section: Study Areamentioning

confidence: 99%

Late Pleistocene variation in lignin and fatty acids from core TKN-2004 in a small mountain basin in central Japan

2014

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We generated a record of lignin and fatty acid compositions from the TK-2004 core in Takano Basin, central Japan, during 39-162 ka by TMAH-thermochemolysis-GC/MS. We tested lignin and fatty acid compositions in the sediments of a small lake (1.88 km 2 watershed) as a paleovegetation proxy to understand the responses of terrestrial vegetation in central Japan to global climate change. Variation in terrestrial organic carbon contents estimated by C/N and ∑8 was parallel to the total organic content (TOC) variation, suggesting that the inflow of terrestrial organic matter was a major factor determining the TOC. The ratio of mid-chain C 20 -C 24 n-fatty acids to short-chain C 14 -C 18 n-fatty acids (MFA/SFA ratio) and the ratio of cinnamyl to vanillyl phenols (C/V ratio) of lignin gradually increased from mid-MIS 6 to early MIS 3. The increase in both parameters suggested increase in the contribution of submerged and floating plants as the flats were expanded in the lake margin. The ratio of syringyl to vanillyl phenols (S/V ratio) corresponded to the pollen vegetation index. This correspondence indicated that the S/V ratio reflected the relative abundance of angiosperms to gymnosperms in the Takano Basin. The consistency of the S/V ratio at the site of core TKN-2004 and the other two locations suggests that the S/V ratio in a small basin is a robust proxy for terrestrial vegetation on a regional scale.

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Stratigraphy and Chronology of Widespread Tephra Beds Intercalated in the TKN-2004 Core Sediment Obtained from the Takano Formation, Central Japan

Cited by 51 publications

References 29 publications

Major and trace element abundances in volcanic glass shards in visible tephras in SG93 and SG06 drillcore samples from Lake Suigetsu, central Japan, obtained using femtosecond LA–ICP–MS

Major and trace element abundances in volcanic glass shards in visible tephras in SG93 and SG06 drillcore samples from Lake Suigetsu, central Japan, obtained using femtosecond LA–ICP–MS

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

Late Pleistocene variation in lignin and fatty acids from core TKN-2004 in a small mountain basin in central Japan

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