第四紀後期の地磁気変化

DOI Web Site 被引用文献1件

書誌事項

タイトル別名
  • Geomagnetic Variation During the Late Quaternary
  • ダイ4キ コウキ ノ チジキ ヘンカ

この論文をさがす

抄録

Many geomagnetic polarity variations have been revealed by recent measurements of lacustrine and marine sediments which accumulated at high sedimentation rates during the Brunhes Normal Polarity Epoch. An attempt has been made to clarify the characteristics of individual geomagnetic reversal events occurring in the Quaternary by comparison of the virtual geomagnetic pole (VGP) path with those of Neogene geomagnetic transitions. The VGP paths during the excursions and reversal transitions show particular patterns according to geologic age, as follows:<br>1. VGPs of intermediate direction of magnetization were mostly located in the central Pacific region during the Early Miocene.<br>2. From the Middle Miocene to the Pliocene, VGPs migrated across the eastern Atlantic and African regions.<br>3. In the Early Pleistocene, VGP paths took their way across the Indian Ocean and the south Pacific.<br>4. At the Matuyama-Brunhes polarity transition, the poles were located in the western Pacific.<br>5. Although we do not yet have sufficient pole path data for the Blake and older excursions in the Brunhes Normal Polarity Epoch, available data indicate a younger oscillating variation pattern, and the pole paths are located in the equatorial region of the central Pacific as well as in the eastern Atlantic.<br>Another conspicuous characteristic of the VGP paths recognized in Japan is that none have been located in the central and western Atlantic region throughout the Late Cenozoic.

収録刊行物

  • 第四紀研究

    第四紀研究 16 (3), 105-115, 1977

    日本第四紀学会

被引用文献 (1)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ