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Sediment cores and their radiocarbon ages in the Western Ross Sea, Antarctica
https://doi.org/10.15094/00003029
https://doi.org/10.15094/00003029cd0e636f-caa0-45f1-956a-b04653017aae
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000044146 (1.8 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 1998-10-01 | |||||
タイトル | ||||||
タイトル | Sediment cores and their radiocarbon ages in the Western Ross Sea, Antarctica | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Ross Sea | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | late Quaternary | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | sea bottom sediments | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | AMS radiocarbon dating | |||||
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 | |||||
ID登録 | ||||||
ID登録 | 10.15094/00003029 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Nishimura,Akira
× Nishimura,Akira× Nakasone,Toru× Hiramatsu,Chikara× Tanahashi,Manabu |
|||||
著者所属(英) | ||||||
en | ||||||
Geological Survey of Japan/Kawasaki Geological Engineering Co., Ltd./Japan Petroleum Exploration Co. Ltd./Japan National Oil Corporation | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We describe paleoenvironmental changes related to ice sheet and ice shelf developments in the western Ross Sea in the late Quaternary, based on the three sediment cores collected along ca 167°E We distinguish four lithologic units in their sequences as follows (1) Unit I of diatomaceous mud, (2) Unit IIA of mud, (3) Unit IIB of alternating clay and thin laminated silt, and (4) Unit III of consolidated sandy silt with pebbly gravel Interpreted sedimentary environments based on the time constraints of fifteen AMS ^<14>C dates and characteristics of sediments and diatom assemblages, are summarized as follows (1) Prior to the ice sheet advance, this area was possibly under a marine environment, (2) the grounded ice sheet is thought to have advanced between 35 and 20 ka BP, (3) shelf ice possibly covered the southern site between 25 and 20 ka BP, (4) an open marine environment with moderate productivity existed from 20 ka BP at the northern site, and (5) an open marine environment with high productivity existed from 9kaBP The length and timing of the ice sheet advance cannot explain radiocarbon dates of all sites Radiocarbon dating of marine sediments in the Antarctic area shows a large reservoir effect and contamination of reworked dead carbon In our estimation of the ages, two thousand years correction is needed in the upper unit at least Age data for lower units are thought to be older than the true sedimentary ages though these need further consideration | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1130866X | |||||
書誌情報 |
Polar geoscience 巻 11, p. 208-221, 発行日 1998-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |