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  • PANGAEA  (152)
  • ELSEVIER SCIENCE BV  (39)
  • Springer  (5)
Document type
Keywords
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Years
  • 1
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    Gravity crustal models and heat flow measurements for the Eurasia Basin, Arctic Ocean (2009)
    Springer
    In:  Marine Geophysical Researches, 30 (4). pp. 277-292.
    Details
    Publication Date: 2018-06-12
    Description: The Gakkel Ridge in the Arctic Ocean with its adjacent Nansen and Amundsen Basins is a key region for the study of mantle melting and crustal generation at ultraslow spreading rates. We use free-air gravity anomalies in combination with seismic reflection and wide-angle data to compute 2-D crustal models for the Nansen and Amundsen Basins in the Arctic Ocean. Despite the permanent pack-ice cover two geophysical transects cross both entire basins. This means that the complete basin geometry of the world’s slowest spreading system can be analysed in detail for the first time. Applying standard densities for the sediments and oceanic crystalline crust, the gravity models reveal an unexpected heterogeneous mantle with densities of 3.30 × 103, 3.20 × 103 and 3.10 × 103 kg/m3 near the Gakkel Ridge. We interpret that the upper mantle heterogeneity mainly results from serpentinisation and thermal effects. The thickness of the oceanic crust is highly variable throughout both transects. Crustal thickness of less than 1 km dominates in the oldest parts of both basins, increasing to a maximum value of 6 km near the Gakkel Ridge. Along-axis heat flow is highly variable and heat flow amplitudes resemble those observed at fast or intermediate spreading ridges. Unexpectedly, high heat flow along the Amundsen transect exceeds predicted values from global cooling curves by more than 100%.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s11001-010-9093-x
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Gravity crustal models and heat flow measurements for the Eurasia Basin, Arctic Ocean (2009)
    Springer
    In:  Marine Geophysical Researches, 30 (4). pp. 277-292.
    Details
    Publication Date: 2014-09-05
    Description: The Gakkel Ridge in the Arctic Ocean with its adjacent Nansen and Amundsen Basins is a key region for the study of mantle melting and crustal generation at ultraslow spreading rates. We use free-air gravity anomalies in combination with seismic reflection and wide-angle data to compute 2-D crustal models for the Nansen and Amundsen Basins in the Arctic Ocean. Despite the permanent pack-ice cover two geophysical transects cross both entire basins. This means that the complete basin geometry of the world’s slowest spreading system can be analysed in detail for the first time. Applying standard densities for the sediments and oceanic crystalline crust, the gravity models reveal an unexpected heterogeneous mantle with densities of 3.30 × 103, 3.20 × 103 and 3.10 × 103 kg/m3 near the Gakkel Ridge. We interpret that the upper mantle heterogeneity mainly results from serpentinisation and thermal effects. The thickness of the oceanic crust is highly variable throughout both transects. Crustal thickness of less than 1 km dominates in the oldest parts of both basins, increasing to a maximum value of 6 km near the Gakkel Ridge. Along-axis heat flow is highly variable and heat flow amplitudes resemble those observed at fast or intermediate spreading ridges. Unexpectedly, high heat flow along the Amundsen transect exceeds predicted values from global cooling curves by more than 100%.
    Type: Article , PeerReviewed
    DOI: 10.1007/s11001-010-9093-x
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Profile of sediment echo sounding during POLARSTERN cruise ARK-XIV/1a with links to ParaSound data files (2007)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ARK-XIV/1a; AWI_Paleo; CT; DATE/TIME; LATITUDE; LONGITUDE; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; ParaSound (Atlas Hydrographic); Polarstern; PS51; PS51/1a-track; Underway cruise track measurements; Uniform resource locator/link to raw data file
    Type: Dataset
    Format: text/tab-separated-values, 3373 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Profile of sediment echo sounding during SONNE cruise SO183 with links to ParaSound data files (2007)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: AISTEK II; AWI_GeoPhy; Comment; Course; CT; DATE/TIME; Depth, bathymetric; File name; Heading; LATITUDE; LONGITUDE; Marine Geophysics @ AWI; Mozambique Basin; ParaSound (Atlas Hydrographic); SO183; SO183-track; Sonne; Speed; Swath-mapping system Simrad EM-120 (Kongsberg Maritime AS); Underway cruise track measurements; Uniform resource locator/link to image; Uniform resource locator/link to raw data file; Uniform resource locator/link to sgy data file
    Type: Dataset
    Format: text/tab-separated-values, 56840 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Marine gravimetry along the track of POLARSTERN cruise ARK-XIX/4a (2009)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: AWI_GeoPhy; Marine Geophysics @ AWI
    Type: Dataset
    Format: application/gzip, 15.1 MBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Physical oceanography during cruise 64PE305 at CTD station 64PE305-1 (2009)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: 64PE305; 64PE305-1; AISTEK III; AWI_Paleo; Conductivity; CTD; CTD/Rosette; CTD1; CTD-RO; CTD with attached oxygen sensor; Density, mass density; DEPTH, water; Fluorescence, chlorophyll; Indian Ocean; Oxygen; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Pelagia; Salinity; Sound velocity in water; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 18998 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Physical oceanography during cruise 64PE305 at CTD station 64PE305-3 (2009)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: 64PE305; 64PE305-3; AISTEK III; AWI_Paleo; Conductivity; CTD; CTD/Rosette; CTD-RO; CTD with attached oxygen sensor; Density, mass density; DEPTH, water; Fluorescence, chlorophyll; Indian Ocean; Oxygen; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Pelagia; Salinity; Sound velocity in water; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 16667 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Physical oceanography during cruise 64PE306 at CTD station 64PE306-2 (2009)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: 64PE306; 64PE306-4; AISTEK III; AWI_Paleo; Conductivity; CTD; CTD/Rosette; CTD-RO; CTD with attached oxygen sensor; Density, mass density; DEPTH, water; Fluorescence, chlorophyll; Indian Ocean; Oxygen; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Pelagia; Salinity; Sound velocity in water; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 10038 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Continuous thermosalinograph oceanography along POLARSTERN cruise track ARK-XXIII/3 (AMEX I) (2009)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: Arctic Ocean; ARK-XXIII/3; AWI_PhyOce; CT; DATE/TIME; DEPTH, water; LATITUDE; LONGITUDE; Physical Oceanography @ AWI; Polarstern; PS72; PS72/3-track; Salinity; Temperature, water; Thermosalinograph; TSG; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 16914 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Continuous thermosalinograph oceanography along POLARSTERN cruise track ARK-XXIV/3 (2010)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ARK-XXIV/3; AWI_PhyOce; CT; DATE/TIME; DEPTH, water; LATITUDE; LONGITUDE; Physical Oceanography @ AWI; Polarstern; PS74; PS74/3-track; Salinity; Temperature, water; Thermosalinograph; TSG; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 12484 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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