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  • NE Atlantic  (2)
  • APEI3; Area/locality; Area of Particular Environmental Interest 3; CCZ; DEPTH, sediment/rock; Elevation of event; Event label; Iron, acetate-leached; Iron, dithionite-citrate-leached; Iron, hydroxylamine-HCl-leached; Iron, oxalate-leached; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Leaching after Koschinsky et al. (2001); Leaching after Poulton and Canfield (2005); LGM; Longitude of event; Manganese, acetate-leached; Manganese, dithionite-citrate-leached; Manganese, hydroxylamine-HCl-leached; Manganese, oxalate-leached; MUC; MultiCorer; Multicorer with television; North Pacific Ocean; polymetallic nodules; redox zonation; SO239; SO239_121-1; SO239_167-1; SO239_175-1; SO239_199-1; SO239_39-1; SO239_66-1; SO239_84-1; Sonne_2; TVMUC  (1)
Collection
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Ferromanganese crusts as indicators for paleoceanographic events in the NE Atlantic (1996)
    Springer
    International journal of earth sciences 85 (1996), S. 567-576 
    Details
    ISSN: 1437-3262
    Keywords: Ferromanganese crusts ; Phosphatization ; Paleoceanographic events ; NE Atlantic ; Mediterranean outflow water ; Messinian salinity crisis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Hydrogenetic ferromanganese crusts reflect the chemical conditions of the sewater from which they formed. Fine-scale geochemical analysis of crust layers in combination with age determinations can therefore be used to investigate paleoceanographic changes which are recorded in geochemical gradients in the crusts. At Tropic seamount (off northwest Africa), uniform crust growth influenced by terrigenous input from the African continent occurred during approximately the past 12 Ma. Phosphatization of these crusts is minor. In contrast, crusts from Lion seamount, located between Madeira and the Portuguese coast, display a much more variable growth history. A pronounced increase in Ni, Cu, and Zn is observed in some intervals of the crusts, which probably reflects increased surface productivity. A thick older phosphatized generation occurs in many samples. Hydrographic profiles indicate that Mediterranean outflow water (MOW) may play an important role in the composition of these crusts.10Be dating of one sample confirms that the interruption of the MOW during the Messinian salinity crisis (6.2–5 Ma ago) resulted in changes in element composition. Sr-isotope dating of the apatite phase of the old crust generation has been carried out to obtain a minimum age for the older generation of Atlantic crusts and to determine whether crust phosphatization in the Atlantic can be related to phosphatization episodes recorded in Pacific crusts. The preliminary data show that the old phosphatized crust generation might be as old as approximately 30–40 Ma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02369011
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ferromanganese crusts as indicators for paleoceanographic events in the NE Atlantic (1996)
    Springer
    Geologische Rundschau 85 (1996), S. 567-576 
    Details
    ISSN: 0016-7835
    Keywords: Key words Ferromanganese crusts ; Phosphatization ; Paleoceanographic events ; NE Atlantic ; Mediterranean outflow water ; Messinian salinity crisis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Hydrogenetic ferromanganese crusts reflect the chemical conditions of the seawater from which they formed. Fine-scale geochemical analysis of crust layers in combination with age determinations can therefore be used to investigate paleoceanographic changes which are recorded in geochemical gradients in the crusts. At Tropic seamount (off northwest Africa), uniform crust growth influenced by terrigenous input from the African continent occurred during approximately the past 12 Ma. Phosphatization of these crusts is minor. In contrast, crusts from Lion seamount, located between Madeira and the Portuguese coast, display a much more variable growth history. A pronounced increase in Ni, Cu, and Zn is observed in some intervals of the crusts, which probably reflects increased surface productivity. A thick older phosphatized generation occurs in many samples. Hydrographic profiles indicate that Mediterranean outflow water (MOW) may play an important role in the composition of these crusts. 10Be dating of one sample confirms that the interruption of the MOW during the Messinian salinity crisis (6.2–5 Ma ago) resulted in changes in element composition. Sr-isotope dating of the apatite phase of the old crust generation has been carried out to obtain a minimum age for the older generation of Atlantic crusts and to determine whether crust phosphatization in the Atlantic can be related to phosphatization episodes recorded in Pacific crusts. The preliminary data show that the old phosphatized crust generation might be as old as approximately 30–40 Ma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005310050097
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Unknown
    Leached contents of different Manganese and Iron mineral phases for sediment cores taken during SONNE cruise SO239 in the Clarion-Clipperton Zone (CCZ) (2019)
    PANGAEA
    In:  Supplement to: Volz, Jessica B; Liu, Bo; Köster, Male; Henkel, Susann; Koschinsky, Andrea; Kasten, Sabine (2020): Post-depositional manganese mobilization during the last glacial period in sediments of the eastern Clarion-Clipperton Zone, Pacific Ocean. Earth and Planetary Science Letters, 532, 116012, https://doi.org/10.1016/j.epsl.2019.116012
    Details
    Publication Date: 2024-02-02
    Description: This dataset comprises leached contents of different manganese and iron mineral phases from sediment cores, which were retrieved by a multiple corer (MUC) during RV SONNE expedition SO239 in 2015. During this cruise, different European contract areas for the exploration of polymetallic nodules in the area of the Clarion-Clipperton Zone (CCZ) were visited (BGR, IOM, GSR, IFREMER), which are currently being explored in light of potential future deep-sea mining. Furthermore, one of the protected Areas of Particular Environmental Interest (APEI), more precisely the APEI3 north of the CCZ, was visited. For the extraction of various manganese and iron minerals, the extraction schemes after Koschinsky et al. (2001) and Poulton and Canfield (2005) were combined. The leached mineral phases comprise (1) carbonate-associated Mn and Fe (Mncarb; Fecarb), (2) easily reducible/mobilizable Mn- and Fe(oxyhydr)oxides (Mnmobil; Femobil), (3) easily reducible Fe oxides, such as ferrihydrite and lepidocrocite (Feox1) and associated Mn oxides (Mnox1), (4) reducible Fe oxides, such as goethite and hematite (Feox2) and associated Mn oxides (Mnox2) and (5) magnetite (Femag) and associated Mn oxides (Mnmag). The dataset was produced in the laboratories of the Alfred Wegener Institute (AWI) Bremerhaven, Germany.
    Keywords: APEI3; Area/locality; Area of Particular Environmental Interest 3; CCZ; DEPTH, sediment/rock; Elevation of event; Event label; Iron, acetate-leached; Iron, dithionite-citrate-leached; Iron, hydroxylamine-HCl-leached; Iron, oxalate-leached; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Leaching after Koschinsky et al. (2001); Leaching after Poulton and Canfield (2005); LGM; Longitude of event; Manganese, acetate-leached; Manganese, dithionite-citrate-leached; Manganese, hydroxylamine-HCl-leached; Manganese, oxalate-leached; MUC; MultiCorer; Multicorer with television; North Pacific Ocean; polymetallic nodules; redox zonation; SO239; SO239_121-1; SO239_167-1; SO239_175-1; SO239_199-1; SO239_39-1; SO239_66-1; SO239_84-1; Sonne_2; TVMUC
    Type: Dataset
    Format: text/tab-separated-values, 638 data points
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    DATA PANGAEA
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