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Episodic growth of juvenile crust and catastrophic events in the mantle
https://nipr.repo.nii.ac.jp/records/2335
https://nipr.repo.nii.ac.jp/records/2335805af4a4-bcca-4cd4-853c-72a8705ec73d
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012887 (569.5 kB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 1998-12-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Episodic growth of juvenile crust and catastrophic events in the mantle | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | crustal growth | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | supercontinents | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | mantle plumes | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | episodic ages | |||||
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 | departmental bulletin paper | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Condie, Kent C.
× Condie, Kent C. |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Earth & Environmental Science, New Mexico Institute of Mining and Technology | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Episodic growth of continental crust and supercontinents at 2.7,1.9,and 1.2 Ga may be caused by superevents in the mantle as descending slabs pile up at the 660-km seismic discontinuity and then catastrophically sink into the lower mantle. A superevent cycle involves supercontinent breakup that initiates both slab avalanches and the onset of formation of a new supercontinent; arrival of slabs at the D" layer triggers mantle plumes that rise and bombard the base of lithosphere producing juvenile crust trapped in the growing supercontinent; and shielding of the mantle beneath the new supercontinent results in a mantle upwelling that eventually breaks the supercontinent as the cycle starts over. Superevents comprise three or four events each of 50-80 My duration, each of which may reflect slab avalanches at different locations and times at the 660-km discontinuity. Superplume events in the late Paleozoic and Mid-Cretaceous may have been caused by minor slab avalanches as the 660-km discontinuity became more permeable to the passage of slabs. The total duration of a superevent cycle decreases with time probably reflecting the cooling of the mantle. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 53, p. 1-7, 発行日 1998-12 |