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PANGAEA tech-keyword 'citableWithChilds' (56524 data sets)

Mostrando recursos 1 - 20 de 137.450

  1. (Table 2) Total elemental contents of bulk soil from a Sitka spruce (Picea sitchensis) forest near Cox Bay, on the west coast of Vancouver Island, British Columbia

    Vermeire, Marie-Liesse; Cornu, Sophie; Fekiacova, Zuzana; Detienne, Marie; Delvaux, Bruno; Cornélis, Jean-Thomas

  2. (Table 4) Rare-earth elements content and ratio determinations from a Sitka spruce (Picea sitchensis) forest near Cox Bay, on the west coast of Vancouver Island, British Columbia

    Vermeire, Marie-Liesse; Cornu, Sophie; Fekiacova, Zuzana; Detienne, Marie; Delvaux, Bruno; Cornélis, Jean-Thomas

  3. (Table 3) Rare-earth elements content in podzol samples from a Sitka spruce (Picea sitchensis) forest near Cox Bay, on the west coast of Vancouver Island, British Columbia

    Vermeire, Marie-Liesse; Cornu, Sophie; Fekiacova, Zuzana; Detienne, Marie; Delvaux, Bruno; Cornélis, Jean-Thomas

  4. (Table 1) Major soil characteristics from a Sitka spruce (Picea sitchensis) forest near Cox Bay, on the west coast of Vancouver Island, British Columbia

    Vermeire, Marie-Liesse; Cornu, Sophie; Fekiacova, Zuzana; Detienne, Marie; Delvaux, Bruno; Cornélis, Jean-Thomas

  5. (Table A.2) HBI biomarker concentrations and PI(III)P25 indices, and PI(III)P25 spring sea ice concentrations of sediment cores from the Barents Sea

    Koseoglu, Deniz Can; Belt, Simon T; Smik, Lukas; Yao, Haoyi; Panieri, Giuliana; Knies, Jochen

  6. (Table A.1) Locations, satellite-derived spring sea ice concentrations (SpSIC; April-June, 1988-2007) and absolute HBI biomarker concentrations of surface sediments in the Barents Sea

    Koseoglu, Deniz Can; Belt, Simon T; Smik, Lukas; Yao, Haoyi; Panieri, Giuliana; Knies, Jochen

  7. Table A.8 Geochemical composition of sediments and rocks from Pempa

    Seiffert, Gerhard

  8. Table A.5 Geochemical results from microprobe analysis

    Seiffert, Gerhard

  9. Geochemical characteristics of soil horizoms in a Sitka spruce (Picea sitchensis) forest near Cox Bay, on the west coast of Vancouver Island, British Columbia

    Vermeire, Marie-Liesse; Cornu, Sophie; Fekiacova, Zuzana; Detienne, Marie; Delvaux, Bruno; Cornélis, Jean-Thomas
    Rare earth elements (REE) total concentration and signature in soils are known to be impacted by successive soil-forming processes. So it can be used as probe of soil processes. However, few studies focus on their behavior in Podzols. Podzols result from the combination of two main pedogenic processes: (1) the strong weathering in the surface eluvial horizon; (2) the downward transfer of dissolved organic matter (OM) and mobile Al and Fe, and their accumulation in the illuvial horizon beneath. Iron oxides and OM are known to have strong affinities with REE, and to play an important role in transfer and...

  10. Geochemical analysis of sulfides from Lake Tanganyika

    Seiffert, Gerhard
    Geothermal waters with maximum temperatures of 103°C emanate from two sublacustrine hot spring areas which are located in the northem part of Lake Tanganyika (East African Riftsystem). The hydrothermalism leads to the formation of crust- and stockwork-like massive sulfide bodies on the lake bottom to a maximum water depth of 46 m. These geothermal vent areas were investigated and sampled during the German-French TANGANYDRO-campaign in 1991. The aim of this work is to characterize the mineralogy and geochemistry of these sulfides and to reconstruct their genesis. Mineralogical methods that have been used inc1ude scatter electron microscopy (SEM), polarization microscopy, and...

  11. HBI concentrations and classification tree model predictions of sea ice conditions for surface sediments and downcore records in the Barents Sea

    Koseoglu, Deniz Can; Belt, Simon T; Smik, Lukas; Yao, Haoyi; Panieri, Giuliana; Knies, Jochen
    We investigated the potential for classification tree (CT) models to provide a further approach to paleo Arctic sea ice reconstruction through analysis of a suite of six highly branched isoprenoid (HBI) biomarkers in 198 surface sediments from the Barents Sea. The four CT models representing modern sea ice conditions were then applied to four downcore records within the study area (cores BASICC 1, 8, 43, and core MSM5/5-712-1) in order to reconstruct sea ice conditions over the last 300 years. The current dataset includes the absolute HBI concentrations in all sediment samples (ng/g dry sed.), as well as CT model...

  12. HBI concentrations and classification tree model predictions of sea ice conditions for surface sediments and downcore records in the Barents Sea

    Koseoglu, Deniz Can; Belt, Simon T; Smik, Lukas; Yao, Haoyi; Panieri, Giuliana; Knies, Jochen
    We investigated the potential for classification tree (CT) models to provide a further approach to paleo Arctic sea ice reconstruction through analysis of a suite of six highly branched isoprenoid (HBI) biomarkers in 198 surface sediments from the Barents Sea. The four CT models representing modern sea ice conditions were then applied to four downcore records within the study area (cores BASICC 1, 8, 43, and core MSM5/5-712-1) in order to reconstruct sea ice conditions over the last 300 years. The current dataset includes the absolute HBI concentrations in all sediment samples (ng/g dry sed.), as well as CT model...

  13. Stratigraphy of sediment core GIK12379-1

    Trauth, M H
    Es wurden die Auswirkungen der bioturbaten Signalverzerrung hochauflösender paläoozeanographischer Zeitreihen untersucht, ihre Einflußfaktoren parametrisiert sowie Maßnahmen zu ihrer rechnerischen Eliminierung gefunden. Der Einfluß der Bioturbation auf die Signalamplitude und -phase wird mit Hilfe des neuen stochastischen Programms TURBO gezeigt, das die zeitlich variable Verwühlung von Einzelkörnern simuliert. Die Simulation zeigt, daß eine zeitlich veränderliche Bioturbation dazu führen kann, daß die Dauer von Schmelzwasserereignissen bis zu zehnfach überschätzt wird. Im Zeitabschnitt der Eiszeit-Termination kann es zu Diskrepanzen von mehr als 5 ka zwischen den AMS_14C-Altern von Planktonforaminiferen mit unterschiedlichen Häufigkeitsverteilungen kommen. Die entsprechenden Isotopenkurven wei- chen im Sedimentprofil bis zu 20...

  14. (Table 1, page 76) Chemical composition of sediments from the Equatorial Pacific Rise at approximatively 39°S

    Piper, David Z

  15. Annotated record of the detailed examination of Mn deposits from R/V Oceanographer cruise RP-1-OC70 in the Equatorial Pacific Rise

    Piper, David Z

  16. Analysis of manganese nodules from the East Pacific

    Piper, David Z
    The distribution of several metals in East Pacific Rise sediments, when normalized to Al2O3, exhibit stronger maxima near the rise crest than when simply plotted on a carbonate-free basis. The similarity (1) between the distribution of metals in ridge sediments and previously measured mean heat flow values and (2) between the composition of crestal sediments and terrestrial ore bodies associated with greenstone belts, strongly supports a hydrothermal origin for rise crest sediments.

  17. (Table 1, pages 779) Alpha track detremination of growth rates of manganese nodules, Pacific Ocean

    MacDougall, J Douglas
    Analyses of the total alpha radioactivity distribution in 31 North Pacific manganese nodules yield an average growth rate of 6.8 ( 2) mm /m.y. Samples from a single box core show almost identical total activity vs. depth profiles, regardless of nodule size or shape. A characteristic feature of many nodules examined is an apparent change (steepening) in slope of the alpha activity profile between depths of 0.5-1.5 mm. This feature may reflect a fundamental feature of nodule growth, possibly mobility of 230Th or its daughters in a regular way, interrupted growth, or nodule turnover. Near-surface decreases in total alpha activity...

  18. (Table 1, pages 779) Alpha track determination of growth rates of manganese nodules, Pacific Ocean

    MacDougall, J Douglas
    Analyses of the total alpha radioactivity distribution in 31 North Pacific manganese nodules yield an average growth rate of 6.8 ( 2) mm /m.y. Samples from a single box core show almost identical total activity vs. depth profiles, regardless of nodule size or shape. A characteristic feature of many nodules examined is an apparent change (steepening) in slope of the alpha activity profile between depths of 0.5-1.5 mm. This feature may reflect a fundamental feature of nodule growth, possibly mobility of 230Th or its daughters in a regular way, interrupted growth, or nodule turnover. Near-surface decreases in total alpha activity...

  19. (Table S1) Concentrations of brGDGTs for each sample set along the Tagus transect

    Warden, Lisa; Kim, Jung-Hyun; Zell, Claudia; Vis, Geert-Jan; de Stigter, Henko; Bonnin, Jerome; Sinninghe Damsté, Jaap S

  20. (Table S1) Concentrations of brGDGTs for each sample set along the Tagus transect

    Warden, Lisa; Kim, Jung-Hyun; Zell, Claudia; Vis, Geert-Jan; de Stigter, Henko; Bonnin, Jerome; Sinninghe Damsté, Jaap S

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