Ash from the Changbaishan Qixiangzhan eruption: A new early Holocene marker horizon across East Asia: A New Early Holocene Marker Horizon Across East Asia

Chunqing Sun*, Luo Wang, Gill Plunkett, Haitao You, Zeyang Zhu, Lei Zhang, Bin Zhang, Guoqiang Chu, Jiaqi Liu

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Citations (Scopus)
141 Downloads (Pure)

Abstract

Prehistoric Holocene eruptions of Changbaishan volcano in Northeast China are poorly dated, with the exception of the 946 CE Millennium eruption. Poorly refined age estimates for the earlier eruptions present problems for the reconstruction of the eruptive history of the volcano. The Qixiangzhan eruption (QE) is a major controversial event in terms of its eruptive timing (ranging from ~88 to ~4 kyr) and style (effusive or explosive). As a result of the imprecise age estimates for the eruption, a geomagnetic field excursion recorded within the QE comendite has been variably correlated with a number of different excursion events observed elsewhere. In this study, a visible early Holocene tephra was identified in Yuanchi Lake, ~30 km east of the Changbaishan volcanic vent, and was dated to 8831‐8100 cal yr BP using Bayesian age modelling. Glass shard compositions enable the correlation of this tephra with the poorly dated QE, as well as with a tephra (SG14‐1058) recorded in Lake Suigetsu, in central Japan. These correlations confirm that the QE was explosive and that the ash from the QE can serve as an important early Holocene marker bed across East Asia. In addition, we propose an age of ~8100 cal yr BP for the QE based on the precise date of the Suigetsu SG14‐1058 tephra. Our results also confirm that the geomagnetic field excursion recorded in the Qixiangzhan comendite dates to ~8100 cal yr BP.
Original languageEnglish
Pages (from-to)6442-6450
Number of pages9
JournalJournal of Geophysical Research: Solid Earth
Volume123
Issue number8
Early online date31 Jul 2018
DOIs
Publication statusPublished - Aug 2018

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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