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PANGAEA - Publishing Network for Geoscientific & Environmental Data (845.267 recursos)

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Datasets with PANGAEA technical keyword @ORFOIS

Mostrando recursos 1 - 20 de 5.556

  1. Sedimentology of cores off Kapp Norvegia, Antarctica

    Vernaleken, Jutta
    Anhand von sedimentologischen Untersuchungen an den Sedimentkernen PS2819 und PS2820 vom antarktischen Kontinentalhang im Bereich von Kapp Norvegia wurden spätquartäre Sedimentationsprozesse rekonstruiert. Die Kerne wurden lithologisch beschrieben und in regelmäßigen Abständen beprobt. Aus jedem Probenhorizont wurde der Wassergehalt, Corg, Karbonat, Dichte und Opal bestimmt, sowie tonmineralogische Untersuchungen und Analysen zur Korngrößenverteilung durchgeführt. Aus der Sandfraktion wurden linksgewundene planktische Foraminiferen der Art Neogloboquadrina pachyderma für die Messung stabiler Sauerstoff- und Kohlenstoffisotope ausgelesen. Mittels der sedimentologischen Parameter wurde eine Klassifizierung der Sedimente in verschiedene Sedimentfazies vorgenommen, die durch signifikante lithologische Variationen und bnderungen in der Sedimentstruktur bestimmt wurden. Die Faziestypen, welche die glazialen...

  2. Sedimentology and age models of sediments from the Indian Ocean

    Sirocko, Frank
    Die Entwicklung des sommerlichen SW-Monsun im Arabischen Meer während der letzten 27,000 Jahre zeigt drei klimatisch stabile Zeitabschnitte: 0-4000 J.v.h., 6000-12,000 J.v.h. und 15,000-27,000 J.v.h.. Phasen großräumiger Änderungen in der Lage des SW-Monsuns fallen in die Zeiten vor 4000-6000 J.v.h. und 12,000-15,000 J.v.h.. Diese Alter wurden über Sauerstoffisotopenstratigraphie an Planktonforaminiferen und 14C-Datierungen bestimmt. Darauf aufbauend und mit Hilfe der sedimentphysikalischen Eigenschaften wurden die Gesamtakkumulationsraten der hemipelagischen Sedimente insgesamt und der einzelnen marinen und lithogenen Sedimentkomponenten bestimmt, besonders die Akkumulationsraten des lithogenen und marinen Karbonats, des Biogen-Opals, der siliziklastischen Korngrößenfraktionen und der Tonminerale. Insgesamt wurden nach dieser Methode die ungestörten, turbiditfreien Profilabschnitte...

  3. Sedimentological analysis of sediments from Amundsen and Bellingshausen Seas, Southern Ocean

    Hillenbrand, Claus-Dieter
    Glaciomarine deposits at the Antarctic continental margin represent an important paleoglaciological and paleoceanographical record of environmental changes in both Antarctica and the adjacent Southern Ocean. In order to reconstruct the climatic-controlled sedimentation history in the Amundsen and Bellingshausen Seas during Quaternary glacial cycles, sedimentological, geochemical and clay mineralogical investigations were carried out on 34 surface sediment samples and On 7 sediment cores. The study of the surface sediment samples allows one to decipher the recent sediment supply and transportation processes. The input of glacial debris is highest in the eastern Bellingshausen Sea because of the subpolar climatic conditions prevailing over...

  4. Sedimentology of sites 14-141, 41-366, 47-397 and 79-544B

    Stein, Ruediger
    Along the N-S-transect of DSDP-Sites 5446, 397, 141, and 366, oxygen and carbon isotopes, flux rates of calcium carbonate, terrigenous matter, and biogenic opal, clay minerals and the size distribution of terrigenous partictes were determined in order to assess the ties between atmospheric and oceanic surface and deep-water circulation off northwest Africa during the late Neogene. During the last 9 m.y., both the paleoceanography in the eastern Atlantic and west African paleodimates were intimately correlated with the evolution of the polar ice sheets as reflected in the benthos d18O curves of the 4 DSDP-Sites. These records make it possible to distinguish...

  5. Sedimentology on cores off the South Orkney Plateau

    Grünig, Sigrun
    Grab samples and cores for sedimentological studies were retrieved along a N-S transect of the South Orkney Plateau margin. On the basis of morphology, the margin has been subdivided into shelf, upper continental slope, and a lower slope region cut by basins and ridges. Grain size, Sand component, and clay mineralogy were determined as well as water, organic carbon and carbonate contents. In addition, vane shear strength, magnetic intensity and the proportion of ice-rafted debris were measured, dating was done by detailed magnetic stratigraphy, the biofluctuation of the radiolarian Cycladophora davisiana and 230-Thorium analyses. Sediment facies distribution is controlled by numerous factors...

  6. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  7. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  8. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  9. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  10. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  11. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  12. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  13. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  14. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  15. Compilation of the results of EU-project BOFS

    BODC; Lowry, Roy K; Machin, P; Cramer, Ray N

  16. Compilation of the results of EU-project BOFS

    Lowry, Roy K; Machin, P

  17. Compilation of the results of EU-project BOFS

    Lowry, Roy K; Machin, P

  18. Compilation of the results of EU-project BOFS

    Lowry, Roy K; Machin, P

  19. Compilation of the results of EU-project BOFS

    Lowry, Roy K; Machin, P

  20. Compilation of scientific results of the EU project BENGAL

    Pfannkuche, Olaf; Rabouille, Christophe; Bassinot, Franck C; Galeron, Joelle; Rice, Anthony L; Bett, Brian J; Vangriesheim, Annick; Hall, Per; Brey, Thomas; Christiansen, Bernd; Springer, Barbara; Ragueneau, Olivier; Gooday, Andrew J; Wolff, George A; Grandel, Sibylle; Vanreusel, Ann; Lampitt, Richard Stephen; Duineveld, Gerard C A; Reyss, Jean-Louis; Megalovasilis, Pavlos; Dell'Anno, Antonio; Varnavas, Soterios; Grehan, Anthony J; Patching, John W; Roberts, Dai; Lamont, Peter; Danovaro, Roberto; Kiriakoulakis, Kostas; Turnewitsch, Robert; Witbaard, Rob; Cosson-Sarradin, Nathalie; Priede, Imants G; Popova, E E

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