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PANGAEA - Publishing Network for Geoscientific & Environmental Data (863.041 recursos)

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Datasets with PANGAEA technical keyword @volberssfb261

Mostrando recursos 1 - 2 de 2

  1. G. bulloides dissolution index of surface sediments

    Volbers, Andrea N A; Henrich, Rüdiger
    The Atlantic is regarded as a huge carbonate depocenter due to an on average deep calcite lysocline. However, calculations and models that attribute the calcite lysocline to the critical undersaturation depth (hydrographic or chemical lysocline) and not to the depth at which significant calcium carbonate dissolution is observed (sedimentary calcite lysocline) strongly overestimate the preservation potential of calcareous deep-sea sediments. Significant calcium carbonate dissolution is expected to begin firstly below 5000 m in the deep Guinea and Angola Basin and below 4400 m in the Cape Basin. Our study that is based on different calcium carbonate dissolution stages of the...
    (text/tab-separated-values, 255 data points) - 06-jun-2018

  2. Planktic foraminifera of sediment core GeoB1710-3

    Volbers, Andrea N A; Henrich, Rüdiger
    In this study, we test various parameters in deep-sea sediments (bulk sediment parameters and changes in microfossil abundances and preservation character) which are generally accepted as indicators of calcium carbonate dissolution. We investigate sediment material from station GeoB 1710-3 in the northern Cape Basin (eastern South Atlantic), 280 km away from the Namibian coast, well outside today's coastal upwelling. As northern Benguela upwelling cells were displaced westward and periodically preceded the core location during the past 245 kyr (Volbers et al., submitted), GeoB 1710-3 sediments reflect these changes in upwelling productivity. Results of the most commonly used calcium carbonate dissolution...
    (text/tab-separated-values, 648 data points) - 25-may-2018

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