Lake Sediments High-resolution Recorder of Environmental Changes. Paleomagnetic Dating Using Geomagnetic Secular Variations and Excursions from Lake Sediments in Japan.

DOI Web Site 7 Citations 28 References

Bibliographic Information

Other Title
  • 湖沼堆積物　地球環境変動の“高精度検出計”　（その１）　日本の湖沼堆積物から得られた地磁気永年変化とエクスカーションによる年代測定
  • ニホン ノ コショウ タイセキブツ カラ エラレタ チジキ エイネンヘンカ ト

Search this article

Abstract

Paleomagnetic studies of lake bottom sediments in Japan have been reviewed to establish a method of magnetostratigraphic dating using geomagnetic secular variations and excursions. For the last 11.6ka, declination and inclination changes can be used as magnetostratigraphic time markers for dating. For the last 60ka, the inclination record from the top 60m of the 200m-core from Lake Biwa may be used for dating with magnetostratigraphic correlation. Tephrochronological data recently published revise the ages of the geomagnetic excursions in the Lake Biwa 200m-core. The excursion at 54m, formally known as the Blake event, is a new one from about 56ka. The Biwa I excursion at 83m, newly dated as 116ka, should correspond to the Blake event. The Biwa II excursion at 131m is newly dated as 188ka. We propose that the three thin zones of negative inclination at 25.8m, 33.8m, and 35.2m are excursions, having occurred at 24ka, 33ka, and 34ka. The six geomagnetic excursions from the Lake Biwa 200m-core are useful for magnetostratigraphic dating for the last 300ka around Japan.

Journal

Citations (7)*help

See more

References(28)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top