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  • 1990-1994  (56)
Collection
Keywords
Publisher
Language
Years
Year
  • 1
    Series available for loan
    Series available for loan
    Russian-german cooperation in the sibirian shelf seas : geo-system Laptev-Sea (1994)
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Details Availability
    Call number: ZSP-168-144
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: IX, 133 S. : Ill, graph. Darst., Kt.
    ISSN: 0176-5027
    Series Statement: Berichte zur Polarforschung 144
    URL: http://hdl.handle.net/10013/epic.10145
    Language: English
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
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    A new, detailed ice-age oxygen-18 record from the ice-sheet margin in central West Greenland (1991)
    Elsevier
    Details
    Publication Date: 1991-10-01
    Print ISSN: 0921-8181
    Electronic ISSN: 1872-6364
    Topics: Geosciences , Physics
    Published by Elsevier
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    PAPER CURRENT
  • 3
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    A new, detailed ice-age oxygen-18 record from the ice-sheet margin in central West Greenland (1991)
    Elsevier
    Details
    Publication Date: 1991-10-01
    Print ISSN: 0031-0182
    Electronic ISSN: 1872-616X
    Topics: Geosciences , Physics
    Published by Elsevier
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    PAPER CURRENT
  • 4
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    Observation of manganese deposits in the Southern Ocean during the R/V Polarstern ANT-IX/3 and ANT-IX/4 expeditions (1992)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-08-28
    Description: On a previous R/V Polarstern cruise ANT-VIII/5 (1989/90), a deep-sea area in the central Weddell Sea was investigated along geophysical and bathymetrical transects. As a result, a seamount-like structure, the informally named "Polarstern Seamount", was detected. This seamount was one of the sampling areas during the ANT-IX/3 leg. Attempts were made to retrieve glaciomarine and hemipelagic sediments, which in this area were expected not to be so strongly affected by bottom currents as are the sediments in the deeper surroundings seas. The seafloor on top of the Polarstern Searnount revealed to be densely covered with Mn encrusted dropstones, as observed by the underwater video-recording obtained from a camera installed at the multi box corer (MG), as well as in the retrieved sediments.
    Keywords: Agulhas Basin; ANT-IX/3; ANT-IX/4; AWI_Paleo; Comment; Deposit type; DEPTH, sediment/rock; Description; Elevation of event; Event label; Gravity corer (Kiel type); Identification; KL; Latitude of event; Longitude of event; Maud Rise; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; Polarstern Kuppe; Position; PS18; PS18/145; PS18/147; PS18/225; PS18/238; PS2003-2; PS2005-1; PS2070-1; PS2082-1; Quantity of deposit; Sediment type; Size; SL; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 50 data points
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  • 5
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    Table 2. Sediment core PS2082: benthic and planktic foraminiferal δ¹⁸O and δ¹³C, benthic census and primary productivity (1994)
    PANGAEA
    Details
    Publication Date: 2023-07-24
    Keywords: Agulhas Basin; ANT-IX/4; AWI_Paleo; Calcium carbonate; Carbon, organic, total; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; Element analyser CHN, LECO; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gravity corer (Kiel type); Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma dextral and/or sinistral, δ13C; Neogloboquadrina pachyderma dextral and/or sinistral, δ18O; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Paleoproductivity as carbon; Polarstern; PP calculated (Müller & Suess, 1979); PP calculated (Stein, 1986); PS18; PS18/238; PS2082-1; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents
    Type: Dataset
    Format: text/tab-separated-values, 1434 data points
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  • 6
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    Table 1. Changes in benthic and planktic foraminferal δ¹⁸O and δ¹³C in sediment core PS1506 (1994)
    PANGAEA
    Details
    Publication Date: 2023-07-24
    Keywords: ANT-V/4; AWI_Paleo; Calcium carbonate; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; Eastern Weddell Sea, Southern Ocean; Element analyser CHN, LECO; Epistominella exigua, δ13C; Epistominella exigua, δ18O; Gravity corer (Kiel type); Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; Oridorsalis umbonatus, δ13C; Oridorsalis umbonatus, δ18O; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS10; PS10/816; PS1506-1; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents
    Type: Dataset
    Format: text/tab-separated-values, 2245 data points
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  • 7
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    Geochemistry of Cenozoic ash layers from the Kerguelen Plateau (1992)
    PANGAEA
    In:  Supplement to: Morche, Wolfgang; Hubberten, Hans-Wolfgang; Mackensen, Andreas; Keller, Jörg (1992): Geochemistry of Cenozoic ash layers from the Kerguelen Plateau (Leg 120): a first step toward a tephrostratigraphy of the Southern Indian Ocean. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 151-160, https://doi.org/10.2973/odp.proc.sr.120.163.1992
    Details
    Publication Date: 2024-01-09
    Description: Geochemical investigations were conducted on 10 discrete ash layers and 22 samples of dispersed ash accumulations from Sites 747, 749, and 751 of Ocean Drilling Program (ODP) Leg 120 to the Kerguelen Plateau in the southern Indian Ocean. The chemical data obtained from some 400 single-grain glass analyses allow the characterization of two rock series. The first consists of transitional to alkali basalts; the second, mainly of trachytes with subordinated rhyolites, all reflecting the characteristic magmatological evolution of the Kerguelen Plateau as a hotspot-related volcanism. Chemical correlation with possible source areas indicates that the ashes were most probably erupted from the Kerguelen Islands. The investigated ash layers clearly reflect the Oligocene to Quaternary changes in the composition of the volcanic material recorded from the Kerguelen Islands. In addition to the Kerguelen Islands, Heard Island, Crozet Island, and other sources may have contributed to deposition of the tephras. Pleistocene tephras of "exotic" calc-alkaline composition are most probably derived from enhanced magmatic activity during that time span at the South Sandwich island arc. When using data obtained from tephras of the ODP Leg 119 Kerguelen sites, several eruptive periods can be correlated through the composition of the deposited ashes. Some of them are widely distributed over the Kerguelen Plateau and are seen as a first step toward a southern Indian Ocean tephrostratigraphy.
    Keywords: 120-747A; 120-747B; 120-749B; 120-751A; DRILL; Drilling/drill rig; Joides Resolution; Leg120; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 8
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    Neogen carbonate and stable isotope record of ODP Hole 120-751A (1992)
    PANGAEA
    In:  Supplement to: Mackensen, Andreas; Barrera, Enriqueta C; Hubberten, Hans-Wolfgang (1992): Neogene circulation in the southern Indian Ocean: evidence from benthic foraminifers, carbonate data, and stable isotope analyses (Site 751). In: S.W. Wise, JR., R. Schlich, et al., Proceedings of the Ocean Drilling Program, Scientific Results, 120, College Station, TX (Ocean Drilling Program), 867-880, https://doi.org/10.2973/odp.proc.sr.120.169.1992
    Details
    Publication Date: 2024-01-09
    Description: Lower Miocene through upper Pleistocene benthic foraminifer assemblage records from Ocean Drilling Program Site 751 on the Southern Kerguelen Plateau (57°44'S, water depth 1634 m) were combined with benthic and planktonic foraminifer oxygen and carbon isotope records and high-resolution CaCO3 data from the same site. Implications for the Neogene productivity and paleoceanography of the southern Indian Ocean are discussed. We used distinctive features of the Miocene d18O and d13C curves for stratigraphic correlation. Coinciding with a lower middle Miocene hiatus from 14.2 to 13.4 Ma, there was a rapid increase in benthic d18O values by 1.2 per mil. This distinct increase occurs in middle Miocene benthic foraminifer oxygen isotope curves from all oceans. No major change, however, in benthic foraminifer faunal composition occurred in this period of growth of the Antarctic ice cap and cooling of deep ocean waters (14.9-14.2 Ma). A drastic change in benthic foraminifer faunas coincided with a hiatus from 8.4 to 5.9 Ma. Shortly after this hiatus, in the latest Miocene, the CaCO3 content of the sediments dropped from 75% to 0%. From that time ( 5.8 Ma) through the early Pliocene, Site 751 has been situated beneath a high biogenic siliceous productivity zone. Carbonate contents of upper Pliocene and Pleistocene sediments vary between 20% and 70%. The benthic foraminifer faunas in the uppermost Pliocene and lower Pleistocene reflect strong bottom current conditions, in contrast to those in the upper Pleistocene, which indicate calm sedimentation and high food supply. High d13C values of planktonic foraminifers compared with low values of benthic foraminifers suggest high primary productivity in the late Pleistocene. The changes in productivity were probably a result of latitudinal migration and meandering of the Polar Frontal Zone.
    Keywords: 120-751A; DRILL; Drilling/drill rig; Joides Resolution; Leg120; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
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    (Table 2) Stable carbon and oxygen isotope record of planktonic foraminifera fromf ODP Hole 120-751A (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 120-751A; Catapsydrax dissimilis, δ13C; Catapsydrax dissimilis, δ18O; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Foraminifera, planktic δ13C; Foraminifera, planktic δ18O; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Globigerina falconensis, δ13C; Globigerina falconensis, δ18O; Globigerina praebulloides, δ13C; Globigerina praebulloides, δ18O; Globigerina spp., δ13C; Globigerina spp., δ18O; Globigerina woodi, δ13C; Globigerina woodi, δ18O; Globorotalia scitula, δ13C; Globorotalia scitula, δ18O; Globorotalia spp., δ13C; Globorotalia spp., δ18O; Globorotalia zealandica, δ13C; Globorotalia zealandica, δ18O; Joides Resolution; Leg120; Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma dextral and/or sinistral, δ13C; Neogloboquadrina pachyderma dextral and/or sinistral, δ18O; Ocean Drilling Program; ODP; Sample code/label; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: text/tab-separated-values, 625 data points
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  • 10
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    (Table 1) Carbonate content of the bulk dry sediment of ODP Hole 120-751A (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 120-751A; Carbonates; Coulometry; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg120; Ocean Drilling Program; ODP; Sample code/label; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: text/tab-separated-values, 894 data points
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