Late Quaternary tephrostratigraphy of underground sediments in the middle west part of Aizu Basin, Fukushima, northeast Japan

Suzuki, Takehiko; Saito, Haruka; Kasahara, Amao; Kuriyama, Etsuhiro; Imaizumi, Tsutomu

doi:10.4116/jaqua.55.1

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…The first layer, TKN1080 (Nagahashi et al, 2007;Kimura et al, 2015), is recorded in the Takano Formation (Fig. 1), whilst a second layer is reported in a borehole 600 km north-east of Daisen in Naka-iwata, Aizu-bange town (Suzuki et al, 2016) (Fig. 1).…”

Section: Pre-at Activitymentioning

confidence: 99%

“…Distally the SAN1 marine tephra glass compositions following Ikehara et al (2015), and new glass data from the equivalent layers in Sea of Japan cores (GH89-2-27 and GH89-2-25) ( Table 4; Supplementary material). Finally the SG06 data is compared to glass data of a two distal DKP candidates; (1) TKN1080 from the Takano formation (Nagahashi et al, 2007) and (2) a distal layer (30.08-30.12m) recovered from borehole AB12-2 in Naka-iwata, Aizu-bange town 600 km north of Daisen volcano (Suzuki et al, 2016; Table 4). All ages reported that are outside the 14 C timeframe are provided in ka with 2σ errors (equivalent to 95.4% probability range).…”

Section: Figurementioning

confidence: 99%

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Constraints on the frequency and dispersal of explosive eruptions at Sambe and Daisen volcanoes (South-West Japan Arc) from the distal Lake Suigetsu record (SG06 core)

Albert

Smith

Suzuki

et al. 2018

Earth-Science Reviews

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Accurately evaluating the tempo and magnitude of prehistoric eruptions is essential for hazard assessments. Here we demonstrate the importance of integrating records from locations close to the volcano with those in distal regions to generate more comprehensive event stratigraphies. The annually laminated (varved) and intensely radiocarbon dated lacustrine sediments of Lake Suigetsu (SG06 core), Japan are used to place chronological constraints on the tempo of volcanism at two stratovolcanoes located favourably upwind of the lake along the SouthWest Japan Arc, Sambe and Daisen. Major and trace element glass compositions are used to assign visible ash (tephra) layers preserved in the SG06 sediment core to past explosive eruptions from these volcanoes. Integrating these stratigraphies confirm that the ~150 ka long lake sequence records nine visible ash layers from Daisen and five from Sambe. The SG06 record captures two periods of closely spaced eruptions at Daisen volcano. The first period begins at ~61.9 ka with three explosive eruptions over ~10 ka, with two events separated by as little as 1.5 ka. One layer (SG06-4281), dated at 59.6 ± 5.4 ka (95.4% probability), relates to the large magnitude, and widely dispersed Daisen Kurayoshi Pumice (DKP) eruption. The other period of frequent activity began at 29,837 ± 96 IntCal13 yrs BP (95.4% probability) with five widely dispersed ash fall events associated with explosive eruptions separated by approximately 6, 936, 5 and 438 years. The integrated proximal-distal event stratigraphy and the high-precision SG06 chronology provide unique insights into the timing and frequency of past explosive volcanism from Daisen and Sambe, which has implications for the prediction of future eruption scenarios.

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Section: Pre-at Activitymentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Constraints on the frequency and dispersal of explosive eruptions at Sambe and Daisen volcanoes (South-West Japan Arc) from the distal Lake Suigetsu record (SG06 core)

Albert

Smith

Suzuki

et al. 2018

Earth-Science Reviews

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“…In order to reconstruct the shallow subsurface geological structure of the Aizu Basin, we first analyzed four sedimentary core samples (GS-AZU-1, GS-SOK-1, GS-NT-1, and AB-12-2 shown in Figure 1) that were drilled in the basin [27][28][29]. The depths of each core range from 99.95 to 130.00 m. Additionally, lithofacies data from 790 boring and snow melting well logs were collected.…”

Section: Analysis Of Shallow Subsurface Geological Structurementioning

confidence: 99%

“…Occasional peat layers are also observed in some cores. The age of the core sediments was determined based on the chronological analyses including tephras (volcanic ashes and pyroclastic flow sediments) and radiocarbon dating [27][28][29]. All strata consist of Quaternary systems including the middle Pleistocene, upper Pleistocene, and Holocene.…”

Section: Mathematical Formulationmentioning

confidence: 99%

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Analysis of Shallow Subsurface Geological Structures and Ground Effective Thermal Conductivity for the Evaluation of Ground-Source Heat Pump System Installation in the Aizu Basin, Northeast Japan

Ishihara¹,

Shrestha²,

Kaneko

et al. 2018

Energies

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Shallow subsurface geological structure mapping combined with ground effective thermal conductivity values at the basin scale provide an appropriate method to evaluate the installation potential of ground-source heat pump systems. This study analyzed the geological structure of the Aizu Basin (Northeast Japan) using sedimentary cores and boring log and mapped the distribution of average ground effective thermal conductivity in the range from −10 m to −100 m depth calculated from cores and logs. Gravel layers dominate in alluvial fans of the northern and southern basin areas, which are found to be associated with higher average ground effective thermal conductivity values, 1.3–1.4 W/m/K, while central and western floodplain areas show lower values of 1.0–1.3 W/m/K due to the existence of thick mud layers in the shallow subsurface. The results indicate that the conventional closed-loop systems are more feasible in northern and southern basin areas than in the central and western areas. Evaluation for the installation potential of the ground-source heat pump systems using depth-based distribution maps of average ground effective thermal conductivity is the originality of this study. This approach is valuable and proper for the simple assessment of the system installation in different sedimentary plains and basins in Japan and other countries.

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Using Late and Middle Pleistocene tephrostratigraphy and cryptotephrostratigraphy to refine age models of Holes ODP1150A and ODP1151C, NW Pacific Ocean: A cross-check between tephrostratigraphy and biostratigraphy

Matsu’ura¹,

Komatsubara

Ahagon

2018

Quaternary Geochronology

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Late Quaternary tephrostratigraphy of underground sediments in the middle west part of Aizu Basin, Fukushima, northeast Japan

Cited by 8 publications

References 5 publications

Constraints on the frequency and dispersal of explosive eruptions at Sambe and Daisen volcanoes (South-West Japan Arc) from the distal Lake Suigetsu record (SG06 core)

Constraints on the frequency and dispersal of explosive eruptions at Sambe and Daisen volcanoes (South-West Japan Arc) from the distal Lake Suigetsu record (SG06 core)

Analysis of Shallow Subsurface Geological Structures and Ground Effective Thermal Conductivity for the Evaluation of Ground-Source Heat Pump System Installation in the Aizu Basin, Northeast Japan

Using Late and Middle Pleistocene tephrostratigraphy and cryptotephrostratigraphy to refine age models of Holes ODP1150A and ODP1151C, NW Pacific Ocean: A cross-check between tephrostratigraphy and biostratigraphy

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