Varved Lacustrine Sediments in Japan : Recent Progress

この論文にアクセスする

この論文をさがす

著者

抄録

Annually laminated (varved) lacustrine sediments provide a potentially continuous, high-resolution records of the last glacial and Holocene paleoenvironments. In 1991-1993, long sequences of laminated lacustrine sediments were successfully taken from two lakes in southwestern Japan, Lake Suigetsu and Lake Tougouike. Based on lamina counting and AMS <sup>14</sup>C dating, we clarified that these laminated sediments were varves. Clay mineral composition in these varved sediments would be reflected by eolian dust concentrations, transported from Chinese Loess Plateau, and by precipitations around both lakes. Also, formation of iron sulfides and carbonates in varves would be caused by cyclic changes of sea-water invasion, originated from sea-level changes. Annual to decadal oscillations of dust and iron mineral concentrations since the last glacial were detected in varved sequences of both lake sediments. These detailed sedimentological analysis of these sediments revealed varve chronology, process of varve formation and annual to decadal changes of sea-level and climate. Some of the climatic changes may correlate with abrupt changes (Younger Dryas and Heinrich events) observed in Greenland ice cores and marine sediments.

収録刊行物

  • 第四紀研究  

    第四紀研究 38(3), 237-243, 1999-06-01 

    Japan Association for Quaternary Research

参考文献:  20件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  5件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10002511616
  • NII書誌ID(NCID)
    AN0034136X
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    04182642
  • NDL 記事登録ID
    4749731
  • NDL 雑誌分類
    ZM49(科学技術--地球科学--地質)
  • NDL 請求記号
    Z15-67
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ