DOI: 10.1016/j.quascirev.2015.01.029
Scopus记录号: 2-s2.0-84922972997
论文题名: Persistently strong Indonesian Throughflow during marine isotope stage 3: Evidence from radiogenic isotopes
作者: Stumpf R. ; Kraft S. ; Frank M. ; Haley B. ; Holbourn A. ; Kuhnt W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 112 起始页码: 197
结束页码: 206
语种: 英语
英文关键词: Ferromanganese coatings
; Foraminiferal cleaning
; Indonesian Throughflow
; Lead isotopes
; Marine isotope stage 3
; Neodymium isotopes
; Strontium isotopes
Scopus关键词: Coatings
; Extraction
; Glacial geology
; Isotopes
; Lead
; Manganese
; Manganese removal (water treatment)
; Neodymium
; Oceanography
; Sea level
; Seawater
; Sediments
; Submarine geology
; Surface waters
; Indonesian throughflow
; Lead isotope
; Marine isotope stages
; Neodymium isotopes
; Strontium isotopes
; Strontium
; clay
; depositional environment
; isotopic composition
; lead isotope
; marine isotope stage
; marine sediment
; neodymium isotope
; paleoceanography
; persistence
; planktonic foraminifera
; radionuclide
; reconstruction
; strontium isotope
; throughflow
; Australia
; Indian Ocean
; Indian Ocean (East)
; Indonesia
; Pacific Ocean
; Pacific Ocean (West)
; Timor Sea
; Foraminifera
英文摘要: The Indonesian Throughflow (ITF) connects the western Pacific Ocean with the eastern Indian Ocean, thus forming one of the major near surface current systems of the global thermohaline circulation. The intensity of the ITF has been found to be sensitive to changes in global ocean circulation, fluctuations in sea level, as well as to the prevailing monsoonal conditions of the Indonesian Archipelago and NW Australia. This study presents the first reconstruction of ITF dynamics combining radiogenic isotope compositions of neodymium (Nd), strontium (Sr), and lead (Pb) of the clay-size detrital fraction to investigate changes in sediment provenance, and paleo seawater Nd signatures extracted from the planktonic foraminifera and authigenic Fe-Mn oxyhydroxide coatings of the marine sediments focussing on marine isotope stage 3 (MIS3). Sediment core MD01-2378 was recovered within the framework of the International Marine Global Change Study (IMAGES) and is located in the area of the ITF outflow in the western Timor Sea (Scott Plateau, 13° 04.95' S and 121° 47.27' E, 1783m water depth). In order to produce reliable seawater signatures, several extraction methods were tested against each other. The results of the study show that at this core location the extraction of surface water Nd isotope compositions from planktonic foraminifera is complicated by incomplete removal of contributions from Fe-Mn oxyhydroxides carrying ambient bottom water signatures. The bottom water Nd isotope signatures reliably obtained from the sediment coatings (average εNd=-5.0) document an essentially invariable water mass composition similar to today throughout the entire MIS3. The radiogenic Nd, Sr, and Pb isotope records of the clay-sized detrital fraction suggest that the Indonesian Archipelago rather than NW Australia was the main particle source at the location of core MD01-2378, and thus indicating a persistently strong ITF during MIS3. Furthermore, the variations of the detrital radiogenic isotopes are shown to be more sensitive to changes in circulation and document a somewhat enhanced ITF intensity during the early part of MIS3 until 47.4. ka compared with the remaining MIS3. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59996
Appears in Collections: 过去全球变化的重建
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, Kiel, Germany; Department of Earth Science and Engineering, Imperial College London, London, United Kingdom; Institute of Geoscience, Christian Albrechts University Kiel, Kiel, Germany
Recommended Citation:
Stumpf R.,Kraft S.,Frank M.,et al. Persistently strong Indonesian Throughflow during marine isotope stage 3: Evidence from radiogenic isotopes[J]. Quaternary Science Reviews,2015-01-01,112