A middle Holocene wide-spread tephra, Towada-Chuseri, discovered from a subalpine soil on Mount Aizu-komagatake and the Gassan volcano, northern Japan

• Kariya Yoshihiko

  Department of Geography, Senshu University

• Aoki Kaori

  Department of Environment Systems, Rissho University

• Takaoka Sadao

  Department of Geography, Senshu University

Bibliographic Information

Other Title

• 東北地方南部，会津駒ヶ岳と月山火山で発見された完新世中期の十和田中掫テフラ
• トウホク チホウ ナンブ,アイズ コマガタケ ト ガッサン カザン デ ハッケン サレタ カンシン セイ チュウキ ノ トウワ タナカソウテフラ

Abstract

We analyzed the major element chemical composition of volcanic glass shards in Azuma tephra on Mount Aizu-komagatake and the Gassan volcano in northern Japan by means of electron probe X-ray microanalysis. This analysis confirmed that the two samples of Azuma tephra obtained from those mountains can be identified as the same tephra. We also examined three members of Towada Chuseri tephra (i.e., Chuseri pumice layer, Kanegasawa pumice layer, and Utarube volcanic ash layer) whose age is ca. 6.0 calkaBP in the proximal area of the Towada volcano in northern Japan for comparison with the Azuma tephra on Aizu-komagatake and Gassan. It was found that Azuma tephra originates primarily from Kanegasawa pumice. Azuma tephras found on Aizu-komagatake and Gassan were composed of widespread fine particles derived from the plinian eruption that produced the Kanegasawa pumice layer. Fallout Towada Chuseri tephra is expected to be discovered in the more southern area of Mount Aizu-komagatake, ca. 400km from the Towada volcano.

Journal

• The Quaternary Research (Daiyonki-Kenkyu)

  The Quaternary Research (Daiyonki-Kenkyu) 55 (5), 237-246, 2016

  Japan Association for Quaternary Research

Keywords

• Azuma tephra
• Kanegasawa pumice
• wide-spread tephra
• subalpine soil

Details

• CRID: 1390282681473878912
• NII Article ID: 130005250903
• NII Book ID: AN0034136X
• DOI: 10.4116/jaqua.55.237
• ISSN: 18818129
• ISSN: 04182642
• NDL BIB ID: 027671762
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027671762
• Web Site: https://www.jstage.jst.go.jp/article/jaqua/55/5/55_237/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed