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Lithostratigraphy and paleoceanography in the Chukchi Rise of the western Arctic Ocean since the last glacial period
https://nipr.repo.nii.ac.jp/records/14032
https://nipr.repo.nii.ac.jp/records/14032c11fa375-776a-48e2-8be9-df7c1fa271cc
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2017-02-28 | |||||
タイトル | ||||||
タイトル | Lithostratigraphy and paleoceanography in the Chukchi Rise of the western Arctic Ocean since the last glacial period | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Lithostratigraphy and paleoceanography in the Chukchi Rise of the western Arctic Ocean since the last glacial period | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Lithostratigraphy | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Paleoceanography | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Geochemical proxies | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Provenance | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Chukchi Rise | |||||
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 | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Park, Kwangkyu
× Park, Kwangkyu× Ohkushi, Ken'ichi× Cho, Hyen Goo× Khim, Boo-Keun |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Paleoceanographic multi-proxies were investigated from two piston cores PC01 and PC04, along with two pilot cores PL01 and PL04, collected from the Chukchi Rise in the western Arctic Ocean during the R/V Mirai Cruise MR09-03. Both cores were composed of three lithologic units (Unit I: the Holocene brownish sandy mud, Unit II: the deglacial IRD layer, and Unit III: the glacial and gray thick mud with intervened IRD layers). The age estimate of the core units were decided by AMS 14C dates and confirmed by the correlation of the geochemical properties and ice-rafted debris (IRD) pattern with the well-dated core (P2) in the study area. The geochemical, isotopic, and mineralogical properties indicate different paleoceanographic conditions of three lithologic units in the Chukchi Rise: low primary production during the glacial period (Unit III), high terrigenous contribution during the deglacial period (Unit II), and increase in diatom productivity during the late Holocene (Unit I). In particular, most IRDs were specified as detrital carbonates (calcites and dolomites) by SEM-EDS examination. The sediment source from the northern North America and the transport pathway by the Beaufort Gyre were confirmed by the isotopic signature of bulk IRDs and high kaolinite content of fine-grained particles. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 本研究では研究船「みらい」のMR09-03航海の際に、西部北極海のチュクチライズから採取したコア試料について古海洋学的研究を行った。コアは、3つの岩相ユニットから成る。ユニットIは完新世の褐色砂質泥からなる。ユニットIIは融氷期の漂流岩屑(IRD)層からなる。ユニットIIIはIRD層を挟在する氷期の灰色泥である。各ユニットの堆積年代の決定は、放射性炭素年代測定とともに年代既知の既存コアの地球化学的特徴とIRD層との対比によってなされた。岩相ユニットはそれぞれ異なる古海洋環境を示す。ユニットIII:氷期の低基礎生産、ユニットII:融氷期の高い陸源砕屑物の寄与、ユニットI:完新世後期の珪藻生産性の増大。IRD等の分析から、堆積物は北部北アメリカから供給され、ボーフォートジャイアによって輸送されたと推定した。 | |||||
書誌情報 |
en : Polar Science 巻 11, p. 42-53, 発行日 2017-03 |
|||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://dx.doi.org/10.1016/j.polar.2017.01.002 | |||||
関連名称 | 10.1016/j.polar.2017.01.002 |