Sequence of Early Pleistocene Shirakawa ignimbrites and their identifications in distal areas in Northeast Japan

Suzuki, Takehiko; Murata, Masanori; Mizuno, Kiyohide; Ishihara, Takeshi

doi:10.1016/j.quaint.2017.06.069

Cited by 7 publications

(12 citation statements)

References 21 publications

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“…These estimated volumes for distal fallout tephra are three to eight times larger than the volumes reported by Suzuki et al . (). In addition, a candidate tephra that may be correlated to Sr‐Kc‐U8 was detected at IODP Site U1436, which is approximately 320 km south‐east of Honshu (Schindlbeck et al ., ).…”

Section: Discussionmentioning

confidence: 98%

“…Suzuki et al . () identified the distal fallout tephras associated with Sr‐Asn‐Kd8 and Sr‐Kc‐U8 in the Kanto area. Moreover, they estimated the volume of each deposit as approximately 9 km 3 (DRE) by using the thickness and the distance from the source at the most distant observed point (≈190 km) with the assumption that they are distributed radially in a uniform manner.…”

Section: Discussionmentioning

confidence: 99%

“…: volcanic ash layer; (2) Reference: a: Suzuki et al . (), b: Kurokawa et al . (), c: Satoguchi (1995), d: Yoshikawa (), e: Yoshida and Takahashi (), f: Suzuki and Nakayama (), g: Yoshikawa (), h: Tsuno and Otsuka (), i: Sudo (); (3) Localities are shown in Fig.…”

Section: Samples and Analytical Methodsmentioning

confidence: 97%

“…Widespread tephras and their sources associated with huge caldera‐forming eruptions in the Tohoku area newly correlated in this paper are shown with thick lines, large black circles and tephra names in bold, respectively. Distributions of tephras are after Suzuki and Nakayama (), Suzuki et al . (), Machida and Arai () and Mizuno (), and the age from magneto‐stratigraphy is after Lisiecki and Raymo ().…”

Section: Regional Settingmentioning

confidence: 99%

“…Manabe et al, 1970Manabe et al, , 1987Moriya, 1978;Yoshida and Takahashi, 1991;Yamamoto, 1999Yamamoto, , 2011Yamamoto et al, 2005). Subsequently, Suzuki et al (2017) re-examined the eruptive sequence of the following Shirakawa Ignimbrites in ascending order: Shirakawa-Kumado (Sr-Kmd), Shirakawa Akai-Kd18 (Sr-Aki-Kd18), Shirakawa Ashino-Kd8 (Sr-Asn-Kd8), Nishigo, Shirakawa Kachikata-U8 (Sr-Kc-U8) and Ten-ei ignimbrites. These ignimbrites were correlated with distal fallout tephras in the Kanto area, except for the Ten-ei Ignimbrite.…”

Section: Aizu Volcanic Regionmentioning

confidence: 99%

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Identification of Lower Pleistocene widespread tephras associated with large caldera‐forming eruptions in the Tohoku area, north‐east Japan

Suzuki

Maruyama²,

Danhara³

et al. 2019

J Quaternary Science

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Tephra fingerprinting techniques contributing to volcanology and palaeoenvironmental studies have been developed using a combination of laser-ablation inductively coupled-plasma mass spectrometry (LA-ICP-MS) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS). In particular, femtosecond LA-ICP-MS can determine major-and trace element abundances in individual glass shards. On the basis of the major oxide and trace element composition of the glass shards, using those methods, we re-examined the identification of four lower Pleistocene tephras originating from north-east Japan. All trace element abundances exhibited the typical pattern of tephras from the Hokkaido-Tohoku area, and major element concentrations were distinct. As a result, we re-examined the correlation of the widespread Tmg-R4 tephra (2.0 Ma), and newly defined the widespread Kd44-Naka tephra (1.968-1.781 Ma), both originating from the Sengan geothermal region. Furthermore, we re-examined identifications of Sr-Asn-Kd8 (1.219 Ma) and Sr-Kc-U8 (0.922-0.910 Ma) in central Japan, both derived from the Aizu volcanic region. The extensive distributions of the former two tephras suggest the occurrence of two large caldera-forming eruptions (Volcanic Explosivity Index 7) during a short period. Also, the distributions and volumes of the latter two tephras are broader and larger than those previously assumed. The results provide insight into large volcanic eruption history and terrestrial and marine palaeoenvironmental history.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Samples and Analytical Methodsmentioning

confidence: 97%

Section: Regional Settingmentioning

confidence: 99%

Section: Aizu Volcanic Regionmentioning

confidence: 99%

See 3 more Smart Citations

Identification of Lower Pleistocene widespread tephras associated with large caldera‐forming eruptions in the Tohoku area, north‐east Japan

Suzuki

Maruyama²,

Danhara³

et al. 2019

J Quaternary Science

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Improving tephrostratigraphy and cryptotephrostratigraphy since 1 Ma of Hole U1437B in the Izu-Bonin arc, NW Pacific: Differentiation of widespread tephras with similar shard chemistries

Matsu'ura,

Komatsubara,

Ikehara

2023

Quaternary Science Reviews

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Pleistocene Tephrostratigraphy and Underground Sediments under the Koriyama Basin at the Southern Part of Northeast Japan

Kasahara

Suzuki

Kawai

et al. 2017

Journal of Geography(Chigaku Zasshi)

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Recent advance of Quaternary tephra studies in Northeast Japan enables us to reconstruct depositional histories in inland basins back to Middle to Early Pleistocene. The Koriyama Basin located in the southern part of the Northeast Japan arc is filled with the Koriyama Formation （KF） forming dissected Koriyama Upland. Previous studies have reported that KF is Pleistocene sediments composed of gravel, sand, and silt. However, comparing to numerous chronological studies in the coastal areas of Northeast Japan, chronological data for this basin-fill sediment are not enough. This causes in difficulties for the reconstruction of landform development in this area. Here, we present Early to Middle Pleistocene tephrostratigraphy beneath the Koriyama Basin. An all-core boring （KR-11-1） was carried out at the Fukushima Prefectural Koriyamakita Technical High-school （FKTH） on the Koriyama Upland, where the Upper Part of KF （UKF: 0⊖46.31 m） , the Lower Part of KF （LKF: 46.31⊖69.60 m） and the Shirakawa Formation （SF: 69.60⊖100.33 m） were detected. In UKF, we recognized two tephras, that is, Sn-SK （37.63⊖ 37.67 m; 0.17⊖0.27 Ma） and So-OT （38.24⊖38.40 m; 0.31⊖0.33 Ma） . A pyroclastic flow deposit （KR8038） was found in 69.60⊖80.38 m in depth. It was correlated to U8 tephra （0.910⊖0.922 Ma） in the Umegase Formation of the Kazusa Group, marine sediments in the Boso Peninsula, south Kanto. We also recognized other two tephras, Hu-TK （0.15⊖0.20 Ma） and Sn-MT （0.18⊖ 0.26 Ma） from stored core （FKTH-A and FKTH-B cores） samples drilled at the FKTH. Tephrostratigraphy in KF and SF beneath the Koriyama Basin indicates that LKF deposited during 0.922⊖0.31 Ma, and UKF started to deposit before 0.33⊖0.31 Ma.

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Sequence of Early Pleistocene Shirakawa ignimbrites and their identifications in distal areas in Northeast Japan

Cited by 7 publications

References 21 publications

Identification of Lower Pleistocene widespread tephras associated with large caldera‐forming eruptions in the Tohoku area, north‐east Japan

Identification of Lower Pleistocene widespread tephras associated with large caldera‐forming eruptions in the Tohoku area, north‐east Japan

Improving tephrostratigraphy and cryptotephrostratigraphy since 1 Ma of Hole U1437B in the Izu-Bonin arc, NW Pacific: Differentiation of widespread tephras with similar shard chemistries

Pleistocene Tephrostratigraphy and Underground Sediments under the Koriyama Basin at the Southern Part of Northeast Japan

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