Recursos de colección

PANGAEA - Publishing Network for Geoscientific & Environmental Data (831.629 recursos)

The information system PANGAEA is operated as an Open Access library aimed at archiving, publishing and distributing georeferenced data from earth system research. The system guarantees long-term availability of its content through a commitment of the operating institutions.

Datasets of project "Environmental Control on Carbonate Mound Formation along the European Margin"

Mostrando recursos 1 - 20 de 82

  1. Lipids and nitrogen isotopes of deep-water corals

    Kiriakoulakis, Kostas; Fisher, Elizabeth; Wolff, George A; Freiwald, André; Grehan, Anthony J; Roberts, Murray J
    The lipid and organic nitrogen isotopic (delta15N) compositions of two common deep-water corals (Lophelia pertusa and Madrepora oculata) collected from selected locations of the NE Atlantic are compared to the composition of suspended particulate organic matter, in order to determine their principle food source. Initial results suggest that they may feed primarily on zooplankton. This is based on the increased abundances of mono-unsaturated fatty acids and alcohols and the different ratios of the polyunsaturated fatty acids, 22:6/20:5 of the corals when compared to those of the suspended particulate organic matter. There is enrichment in L. pertusa of mono-unsaturated fatty acids...

  2. Biogeochemistry of the Darwin Mounds, NE Atlantic

    Kiriakoulakis, Kostas; Bett, Brian J; White, Martin; Wolff, George A
    The Darwin Mounds are a series of small (<=5 m high, 75-100 m diameter) sandy features located in the northern Rockall Trough. They provide a habitat for communities of Lophelia pertusa and associated fauna. Suspended particulate organic matter (sPOM) reaching the deep-sea floor, which could potentially fuel this deep-water coral (DWC) ecosystem, was collected during summer 2000. This was relatively "fresh" (i.e. dominated by labile lipids such as polyunsaturated fatty acids) and was derived largely from phytoplankton remains and faecal pellets, with contributions from bacteria and microzooplankton. Labile sPOM components were enriched in the benthic boundary layer (~10 m above...

  3. Carbonate sedimentology of the Propeller Mound, Northeast Atlantic

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian
    High resolution studies from the Propeller Mound, a cold-water coral carbonate mound in the NE Atlantic, show that this mound consists of >50% carbonate justifying the name "carbonate mound". Through the last ~300,000 years approximately one third of the carbonate has been contributed by cold-water corals, namely Lophelia pertusa and Madrepora oculata. This coral bound contribution to the carbonate budget of Propeller Mound is probably accompanied by an unknown portion of sediments buffered from suspension by the corals. However, extended hiatuses in Propeller Mound sequences only allow the calculation of a net carbonate accumulation. Thus, net carbonate accumulation for the...

  4. (Table 3) Age determination of sediment core GeoB6730-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  5. (Table 3) Age determination of sediment core GeoB6729-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  6. (Table 3) Age determination of sediment core GeoB6728-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  7. Sedimentology and stable oxygen isotope ratios of foraminifera from cores of the Porcupine Seabight, Northeast Atlantic

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk
    Large carbonate mound structures have been discovered in the northern Porcupine Seabight (Northeast Atlantic) at depths between 600 and 1000 m. These mounds are associated with the growth of deep-sea corals Lophelia pertusa and Madrepra oculata. In this study, three sediment cores have been analysed. They are from locations close to Propeller Mound, a 150 m high ridge-like feature covered with a cold-water coral ecosystem at its upper flanks. The investigations are concentrated on grain-size analyses, carbon measurements and on the visual description of the cores and computer tomographic images, to evaluate sediment content and structure. The cores portray the depositional...

  8. (Table 2) Age determination of sediment core GeoB6725-1

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk

  9. (Table 2) Age determination of sediment core GeoB6719-1

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk

  10. Stable oxygen isotope ratios and grain size analyses of sediment cores from the Propeller Mound, Northeast Atlantic

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian
    The first detailed stratigraphic record from a deep-water carbonate mound in the Northeast Atlantic based on absolute datings (U/Th and AMS 14C) and stable oxygen isotope records reveals that its top sediment sequences are condensed by numerous hiatuses. According to stable isotope data, mainly sediments with an intermediate signal are preserved on the mound, while almost all fully glacial and interglacial sediments have either not been deposited or have been eroded later. The resulting hiatuses reduce the Late Pleistocene sediment accumulation at Propeller Mound to amounts smaller than the background sedimentation. The hiatuses most likely result due to the sweeping of...

  11. Benthic foraminifera, stable isotope ratios and carbon concentrations of sediment cores from Propeller Mound and Porcupine Srabight

    Rüggeberg, Andres; Dullo, Wolf Christian; Dorschel, Boris; Hebbeln, Dierk
    On- and off-mound sediment cores from Propeller Mound (Hovland Mound province, Porcupine Seabight) were analysed to understand better the evolution of a carbonate mound. The evaluation of benthic foraminiferal assemblages from the off-mound position helps to determine the changes of the environmental controls on Propeller Mound in glacial and interglacial times. Two different assemblages describe the Holocene and Marine Isotope Stage (MIS) 2 and late MIS 3 (~31 kyr BP). The different assemblages are related to changes in oceanographic conditions, surface productivity and the waxing and waning of the British Irish Ice Sheet (BIIS) during the last glacial stages. The...

  12. Reflection seismic profile of cruise Belgica 01/12 to the Porcupine area in 2001

    Van Rooij, David; Henriet, Jean Pierre

  13. Reflection seismic profile of cruise Belgica 03/13 to the Porcupine area in 2003

    Van Rooij, David; Henriet, Jean Pierre

  14. Reflection seismic profile of cruise Belgica 00/16 to the Porcupine area in 2000

    Van Rooij, David; Henriet, Jean Pierre

  15. Reflection seismic profile of cruise Belgica 99/01 to the Porcupine area in 1999

    Van Rooij, David; Henriet, Jean Pierre

  16. Reflection seismic profile of cruise Belgica 98/01 to the Porcupine area in 1998

    Van Rooij, David; Henriet, Jean Pierre

  17. Reflection seismic profile of cruise Belgica 97/01 to the Porcupine area in 1997

    Van Rooij, David; Henriet, Jean Pierre

  18. (Fig. 6) Assemblage of benthic foraminifera in sediment core GeoB6730-1

    Rüggeberg, Andres; Dullo, Wolf Christian; Dorschel, Boris; Hebbeln, Dierk

  19. (Fig. 4) Assemblage of benthic foraminifera in sediment core GeoB6725-1

    Rüggeberg, Andres; Dullo, Wolf Christian; Dorschel, Boris; Hebbeln, Dierk

  20. (Fig. 6) Sedimentological investigations on core GeoB6727-2

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.