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Crystallization of Superfast-Spreading Oceanic Crust (ODP Hole 1256D, Pacific Ocean) : Constraints From Zircon Geochronology
https://tokushima-u.repo.nii.ac.jp/records/2000291
https://tokushima-u.repo.nii.ac.jp/records/2000291952916cb-f074-409b-8953-ea262c9de528
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ggg_24_10_e2023GC010964.pdf (3.5 MB)
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| Item type | 文献 / Documents(1) | |||||||||||
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| 公開日 | 2024-11-11 | |||||||||||
| アクセス権 | ||||||||||||
| アクセス権 | open access | |||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| 出版社版DOI | ||||||||||||
| 関連識別子 | https://doi.org/10.1029/2023GC010964 | |||||||||||
| 関連名称 | 10.1029/2023GC010964 | |||||||||||
| 出版タイプ | ||||||||||||
| 出版タイプ | VoR | |||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Crystallization of Superfast-Spreading Oceanic Crust (ODP Hole 1256D, Pacific Ocean) : Constraints From Zircon Geochronology | |||||||||||
| 著者 |
Lissenberg, C. Johan
× Lissenberg, C. Johan
× Condon, Daniel J.
× Smye, Andrew J.
× 安間, 了 |
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| 抄録 | ||||||||||||
| 内容記述 | Studies of oceanic crust, which covers a large proportion of the Earth's surface, have provided significant insight into the dynamics of crustal accretion processes at mid-ocean ridges. It is now recognized that the nature of oceanic crust varies fundamentally as a function of spreading rate. Ocean Drilling Program (ODP) Hole 1256D (eastern Pacific Ocean) was drilled into the crust formed at a superfast spreading rate, and hence represents a crustal end member. Drilling recovered a section through lava and sheeted dykes and into the plutonic sequence, the study of which has yielded abundant insight into magmatic and hydrothermal processes operating at high spreading rates. Here, we present zircon U-Pb dates for Hole 1256D, which constrain the age of the section, as well as the duration of crustal accretion. We find that the main pulse of zircon crystallization within plutonic rocks occurred at 15.19 Ma, consistent with magnetic anomalies, and lasted tens of thousands of years. During this episode, the main plutonic body intruded, and partial melts of the base of the sheeted dykes crystallized. One sample appears to postdate this episode by up to 0.25 Myr, and may be an off-axis intrusion. Overall, the duration of crustal accretion was tens to several hundreds of thousands of years, similar to that found at the fast-spreading East Pacific Rise and the slow-spreading Mid-Atlantic Ridge. This indicates that crustal accretion along slow- to superfast-spreading ridges occurs over similar time scales, with substantially longer periods of accretion occurring at ultraslow-spreading ridges characterized by thick lithosphere. | |||||||||||
| 書誌情報 |
en : Geochemistry, Geophysics, Geosystems 巻 24, 号 10, p. e2023GC010964, 発行日 2023-10-11 |
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| 収録物ID | ||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||
| 収録物識別子 | 15252027 | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | American Geophysical Union | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | Wiley | |||||||||||
| 権利情報 | ||||||||||||
| 権利情報 | This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work isproperly cited. | |||||||||||
| EID | ||||||||||||
| 識別子 | 406220 | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
