Astronomically calibrated ages for geomagnetic reversals within the Matuyama chron

• Horng Chorng-Shern

  Institute of Earth Sciences, Academia Sinica

• Lee Meng-Yang

  Institute of Earth Sciences, Academia Sinica

• Palike Heiko

  Godwin Institute, Department of Earth Sciences, University of Cambridge, New Museums Site

• Wei Kuo-Yen

  Department of Geosciences, National Taiwan University

• Liang Wen-Tzong

  Institute of Earth Sciences, Academia Sinica

• Iizuka Yoshiyuki

  Institute of Earth Sciences, Academia Sinica

• Torii Masayuki

  Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science

抄録

We present a magnetostratigraphic record from the western Philippine Sea that is tied to a marine δ¹⁸O record for the past 2.14 million years. The ages of geomagnetic reversals were astronomically calibrated by tuning the oxygen isotopic stratigraphy, yielding a chronology for the following subchrons: Matuyama/Brunhes boundary, 781±3 ka (slightly above δ¹⁸O Stage 19.3); top of the Santa Rosa polarity interval, 920 ± 2 ka (Stage 23/24); base of the Santa Rosa polarity interval, 925 ± 1 ka (Stage 24); top of the Jaramillo subchron, 988 ± 3 ka (Stage 27); base of the Jaramillo subchron, 1072 ± 2 ka (Stage 31); top of the Cobb Mountain subchron, 1173 ± 4 ka (Stage 35/36); base of the Cobb Mountain subchron, 1185 ± 5 ka (Stage 36); top of the Olduvai subchron, 1778 ± 3 ka (Stage 63/64); base of the Olduvai subchron, 1945 ± 4 ka (Stage 71/72); top of the Réunion II subchron, 2118 ± 3 ka (Stage 80/81); and base of the Réunion II subchron, 2133 ± 5 ka (Stage 81). This astronomically calibrated chronology independently confirms the ages of major reversals in recently published astronomically calibrated polarity timescales for the Matuyama chron. It also provides the first astronomically calibrated dates for the lower and upper reversals associated with the Cobb Mountain and Santa Rosa polarity intervals, respectively.

収録刊行物

• Ｅａｒｔｈ，　Ｐｌａｎｅｔｓ　ａｎｄ　Ｓｐａｃｅ

  Ｅａｒｔｈ，　Ｐｌａｎｅｔｓ　ａｎｄ　Ｓｐａｃｅ 54 (6), 679-690, 2002

  地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会

キーワード

• Space and Planetary Science
• Geology

詳細情報

• CRID: 1390282681489605376
• NII論文ID: 10008698490
• NII書誌ID: AA11211921
• DOI: 10.1186/bf03351719
• ISSN: 18805981
• ISSN: 13438832
• NDL書誌ID: 6191026
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6191026
• Web Site: https://link.springer.com/content/pdf/10.1186/BF03351719.pdf
• Web Site: https://link.springer.com/article/10.1186/BF03351719/fulltext.html
• Web Site: http://link.springer.com/content/pdf/10.1186/BF03351719
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
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