関東・中部地方に分布する第四紀テフラのフィッション・トラック年代 Fission Track Ages of Several Quaternary Tephras in Kanto and Chubu Regions, Central Japan

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抄録

Many Quaternary tephra layers are well preserved in the Kanto and Chubu regions of central Japan. In the last 30 years, radiometric ages for some of these tephra layers were determined by various methods. However, previous fission track ages have been shown to be inaccurate by recent work. In this study, 19 Quaternary tephra layers were newly dated by fission track method with zircon crystals based on zeta calibration, as the I.U.G.S. recommended. The ages determined in the southwest area of the Kanto region, in ascending order of stratigraphy, are as follows : GoP<SUB>2</SUB> : 0.27±0.12 Ma, GoP<SUB>1</SUB> : 0.36±0.16 Ma, HBP : 0.43±0.09 Ma, HcP-1 : 0.64±0.23 Ma, HdP-2 0.40±0.17 Ma, Sa Bi : 0.64±0.06 Ma (error is1σ). Ages determined in the Boso Peninsula are as follows : Ks 5 : 0.39±0.20 Ma, Ku 1 : 0.70±0.25 Ma, Kd 10 : 1.20±0.30 Ma. In the Shinshu area of the Chubu region, eight Quaternary tephra layers were dated as follows : Iz-NY : 0.18±0.08 Ma, A<SUB>5</SUB>Pm : 0.31 ± 0.06 Ma, A<SUB>4</SUB>Pm : 0.41±0.07 Ma, A<SUB>3</SUB>Pm 0.39±0.07 Ma, A<SUB>2</SUB>Pm : 0.42±0.08 Ma, A<SUB>1</SUB>Pm : 0.47±0.08 Ma, Nashinoki Cl : 0.74 ±0.09 Ma, Misawa Cl : 0.66±0.09 Ma. The ages determined in the Takayama area of Chubu region are as follows Takayama Pumice : 0.43±0.07 Ma, Kamitakara pfl. : 0.55±0.07 Ma.

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各種コード

  • NII論文ID(NAID)
    10002238087
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    4510911
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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