A younger and protracted emplacement of the Ontong Java Plateau
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- Peter C. Davidson
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, USA.
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- Anthony A. P. Koppers
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, USA.
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- Takashi Sano
- National Museum of Nature and Science, Tsukuba, Japan.
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- Takeshi Hanyu
- Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan.
書誌事項
- 公開日
- 2023-06-16
- 資源種別
- journal article
- DOI
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- 10.1126/science.ade8666
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:p> The submarine volcanic emplacement of the Ontong Java Plateau (OJP) is the suggested cause of Ocean Anoxic Event 1a (OAE 1a). However, no precise timing and duration exists for the formation of OJP, and its connection to OAE1a relies mainly on proxies in the sedimentary record. We provide high-precision <jats:sup>40</jats:sup> Ar/ <jats:sup>39</jats:sup> Ar data from OJP drill and dredge sites that considerably improve OJP’s eruptive history. The ages determined from this work are as much as 10 million years younger than previous dates and indicate a protracted formation over at least 6 million years. OJP now appears too young to have caused OAE1a, but we suggest that it may have had a role in the later OAE1b. The protracted eruptive sequence has implications for the emplacement dynamics of OJP and other large igneous provinces. </jats:p>
収録刊行物
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- Science
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Science 380 (6650), 1185-1188, 2023-06-16
American Association for the Advancement of Science (AAAS)
