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Obrochta, Stephen P; Yokoyama, Yusuke; Yoshimoto, Mitsuhiro; Yamamoto, Shinya; Miyairi, Yosuke; Nagano, Gen; Nakamura, Atsunori; Tsunematusu, Kae; Lamair, Laura; Hubert-Ferrari, Aurélia; Lougheed, Bryan C; Yasuda, Atsushi; Hokanishi, Natsumi; Heyvaer, Vanessa; De Batist, Marc; Fujiwara, Osamu; The QuakeRecNankai Team (2018): Widespread Tephra geochemistry, Lake Motosu Site MOT15-2 age model, and Mt. Fuji eruption ages [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.893286, Supplement to: Obrochta, SP et al. (2018): Mt. Fuji Holocene eruption history reconstructed from proximal lake sediments and high-density radiocarbon dating. Quaternary Science Reviews, 200, 395-405, https://doi.org/10.1016/j.quascirev.2018.09.001

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Published: 2018-08-28 • DOI registered: 2018-09-27

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Abstract:
An 8,000-year lacustrine sediment record from Lake Motosu (Fuji Five Lakes) records several eruptions, including potentially unreported events, of the active Mt. Fuji volcano, which receives approximately 47 million annual visitors. A high-fidelity age model is constructed from tephra ages and high-density radiocarbon dating of terrestrial macrofossil and bulk organic matter. Variability in lake reservoir age is constrained by modern lake water radiocarbon measurement and reverse calibration of tephra calendar ages. We present more accurate ages for known eruptions, detect a wider distribution of ejecta for the most recent summit eruption, and potentially identify previously undetected flank eruptions. There are closely spaced scoria-fall layers that may be difficult to differentiate as separate events in land-based surveys. These results demonstrate the utility of lacustrine sediments as powerful tools for understanding characteristics of volcanic eruptions.
Further details:
Standards run during analysis to verify EPMA output
Coverage:
Median Latitude: 35.213204 * Median Longitude: 138.104595 * South-bound Latitude: 33.204500 * West-bound Longitude: 131.677333 * North-bound Latitude: 35.461500 * East-bound Longitude: 138.967667
Date/Time Start: 2015-11-01T00:00:00 * Date/Time End: 2015-11-01T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Age model analysis from Site MOT15-2. https://doi.org/10.1594/PANGAEA.893278
  2. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Geochemistry results from shards collected proximal to each volcano. https://doi.org/10.1594/PANGAEA.893280
  3. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Geochemistry results from the unknown tephra recovered in Site MOT15-2. https://doi.org/10.1594/PANGAEA.893285
  4. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Core information from different sediment cores of Site MOT15-2. https://doi.org/10.1594/PANGAEA.893281
  5. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Composite splice from Site MOT15-2. https://doi.org/10.1594/PANGAEA.893282
  6. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Radiocarbon dating for Site MOT15-2. https://doi.org/10.1594/PANGAEA.893283
  7. Obrochta, SP; Yokoyama, Y; Yoshimoto, M et al. (2018): Revised ages of eruptions registered in sediments from Lake Motosu, Mt Fuji. https://doi.org/10.1594/PANGAEA.893284