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Schlüter, Michael (1990): Organic carbon and opal in deep sea sediments of the southern and eastern Weddell Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.712512, Supplement to: Schlüter, M (1990): Zur Frühdiagenese von organischem Kohlenstoff und Opal in Sedimenten des südlichen und östlichen Weddellmeeres. Geochemische Analyse und Modellierung (Early diagenesis of organic carbon and opal in sediments of the southern and eastern Weddell Sea. Geochemical analysis and modelling). Berichte zur Polarforschung = Reports on Polar Research, 73, 156 pp, https://doi.org/10.2312/BzP_0073_1990

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Published: 1990 (exact date unknown) • DOI registered: 2009-03-12

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Abstract:
During the ANT V14 (1986187) and ANT V113 (1987188) cruises of R.V. Polarstern sedirnents from the eastern, southern and central Weddell Sea were sarnpled with a boxcorer andlor a multicorer. The 24 sampling locations are distributed over the whole depth range, from shelf to pelagic environments. Porewater concentrations of aluminium, fluoride, manganese, nitrate, nitrite, oxygen and silicate, the pH and the alkalinity were measured. Of the sediment the opal, calcium carbonate and organic carbon content were quantified. The 210Pb-profile was measured for three sedirnent cores.
This investigation deals with the estimation of the amounts of opal and organic carbon (Corg) that are transported into the sediment, the regional distribution of these flux rates and the early diagenetic processes that control the preservation of organic carbon and opal in the sediment.
The flux and degradation rates of organic carbon were determined by modelling the rneasured oxygen and nitrate profiles. The highest flux and degradation rates were found in the eastern shelf sediments. Due to the high Corg-flux (>500 mmol C m**-2 a-1) in this area the oxic environment is restricted to the upper 3 cm of the sediment. In contrast to this, the oxic Zone in the pelagic sedirnents of the Weddell Sea has probably an extension of a few meters. The Corg-flux here, computed from the flux of nitrate throug h the sedimentlwater-interface, is less than 50 mmol C m**-2 a**-1. The flux of organic carbon into the sediments of the continental slope area is usually intermediate between the values computed for the shelf and pelagic sediments. Exceptions are the continental slope region north of Halley Bay. In these sediments the measured oxygen and nitrate profiles indicate a relatively high organic carbon flux. This could be a result of the recurrent development of a coastal polynia in this area. The bioturbation rate determined in this region by a 210Pb-profile is 0,019 cm**2 a**-1.
In the Weddell Sea the opal content at the sediment surface (0-1 cm depth) varies between 0,1 and 7 %-wt. These opal concentrations are rnuch lower than the opal contents determined for the sediments of the ROSS Sea by Ledford-Hoffmann et al. (1986 doi:10.1016/0016-7037(86)90263-2). Therefore the importance of the Antarctic shelf regions for the global silica cycle as stated by Ledford-Hoffmann et al. (1986) has to be reconsidered. The regional distribution of the opal content and the computed opal flux rates are correlated with the organic carbon flux rates.
The processes controlling the preservation of opal are discussed based On the measured aluminium and silicate concentrations in the Pore water and the opal content of the sediment.The depth distribution of the Si- and Al-concentration of the porewater indicates that the reconstitution of clay minerals takes place in the immediate vicinity of the sediment-water nterface. A characterization of these minerals e.g. the estimation of the Si/AI-ratio (Mackin and Aller, 1984 a doi:10.1016/0016-7037(84)90251-5, 1984 b doi:10.1016/0016-7037(84)90252-7) is not possible. With the program WATEQ2 saturation indices are computed to estimate which minerals could reconstitute. In this context the applicability of programs like WATEQ2 for computations of the species distribution and saturation indices in solutions with the ionic strength of sea water is investigated.
Keyword(s):
ms_opal
Project(s):
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
Silicon Cycling in the World Ocean (SINOPS)
Funding:
Fourth Framework Programme (FP4), grant/award no. MAS3970141: Silicon Cycling in the World Ocean
Coverage:
Median Latitude: -73.320793 * Median Longitude: -26.263336 * South-bound Latitude: -78.245160 * West-bound Longitude: -42.030333 * North-bound Latitude: -64.997833 * East-bound Longitude: -4.209000
Date/Time Start: 1987-01-12T14:03:00 * Date/Time End: 1988-02-29T15:11:00
Event(s):
PS1472-4 (PS10/672) * Latitude: -76.584500 * Longitude: -30.544833 * Date/Time: 1987-01-12T14:03:00 * Elevation: -258.0 m * Penetration: 0.1 m * Location: Barents Sea * Campaign: ANT-V/4 (PS10) * Basis: Polarstern * Method/Device: van Veen Grab (VGRAB)
PS1473-1 (PS10/673) * Latitude: -76.634667 * Longitude: -30.629667 * Date/Time: 1987-01-13T09:48:00 * Elevation: -301.0 m * Penetration: 0.1 m * Location: Barents Sea * Campaign: ANT-V/4 (PS10) * Basis: Polarstern * Method/Device: van Veen Grab (VGRAB)
PS1474-1 (PS10/675) * Latitude: -75.857667 * Longitude: -36.386000 * Date/Time: 1987-01-15T13:40:00 * Elevation: -583.0 m * Penetration: 0.37 m * Recovery: 0.37 m * Location: Filchner Trough * Campaign: ANT-V/4 (PS10) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
106 datasets

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Datasets listed in this publication series

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  1. Schlüter, M (1990): (Appendix 2.5) Opal content in surface sediment during Polarstern cruise ANT-V/4. https://doi.org/10.1594/PANGAEA.51469
  2. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1472-4. https://doi.org/10.1594/PANGAEA.51466
  3. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1473-1. https://doi.org/10.1594/PANGAEA.712217
  4. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1474-1. https://doi.org/10.1594/PANGAEA.712218
  5. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1475-1. https://doi.org/10.1594/PANGAEA.712219
  6. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1483-2. https://doi.org/10.1594/PANGAEA.712220
  7. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1484-2. https://doi.org/10.1594/PANGAEA.712221
  8. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1487-1. https://doi.org/10.1594/PANGAEA.712222
  9. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1488-2. https://doi.org/10.1594/PANGAEA.712223
  10. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1489-3. https://doi.org/10.1594/PANGAEA.712224
  11. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1490-2. https://doi.org/10.1594/PANGAEA.712225
  12. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1500-2. https://doi.org/10.1594/PANGAEA.712226
  13. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1507-2. https://doi.org/10.1594/PANGAEA.712227
  14. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1508-2. https://doi.org/10.1594/PANGAEA.712228
  15. Schlüter, M (1990): (Appendix 2.5) Opal content of sediment core PS1509-2. https://doi.org/10.1594/PANGAEA.712229
  16. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1587-1. https://doi.org/10.1594/PANGAEA.51877
  17. Schlüter, M (1990): (Appendix 2.4) Porosity of sediment core PS1587-1. https://doi.org/10.1594/PANGAEA.712232
  18. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1590-1. https://doi.org/10.1594/PANGAEA.712254
  19. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1590-1. https://doi.org/10.1594/PANGAEA.712293
  20. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1590-1. https://doi.org/10.1594/PANGAEA.712276
  21. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1591-2. https://doi.org/10.1594/PANGAEA.712255
  22. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1591-2. https://doi.org/10.1594/PANGAEA.712294
  23. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1593-1. https://doi.org/10.1594/PANGAEA.712295
  24. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1595-2. https://doi.org/10.1594/PANGAEA.712256
  25. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1595-2. https://doi.org/10.1594/PANGAEA.712296
  26. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1595-2. https://doi.org/10.1594/PANGAEA.712277
  27. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1596-1. https://doi.org/10.1594/PANGAEA.51465
  28. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1596-1. https://doi.org/10.1594/PANGAEA.712257
  29. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1596-1. https://doi.org/10.1594/PANGAEA.712297
  30. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1596-1. https://doi.org/10.1594/PANGAEA.712278
  31. Schlüter, M (1990): (Appendix 2.3) Lead210 of sediment core PS1596-2. https://doi.org/10.1594/PANGAEA.51467
  32. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1596-2. https://doi.org/10.1594/PANGAEA.712241
  33. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1599-1. https://doi.org/10.1594/PANGAEA.712258
  34. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1599-1. https://doi.org/10.1594/PANGAEA.712298
  35. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1599-1. https://doi.org/10.1594/PANGAEA.712279
  36. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1599-2. https://doi.org/10.1594/PANGAEA.712242
  37. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1605-2. https://doi.org/10.1594/PANGAEA.712210
  38. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1605-2. https://doi.org/10.1594/PANGAEA.712237
  39. Schlüter, M (1990): (Appendix 2.4) Porosity of sediment core PS1605-2. https://doi.org/10.1594/PANGAEA.712233
  40. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1605-3. https://doi.org/10.1594/PANGAEA.712259
  41. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1605-3. https://doi.org/10.1594/PANGAEA.712299
  42. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1605-3. https://doi.org/10.1594/PANGAEA.712280
  43. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1606-1. https://doi.org/10.1594/PANGAEA.712260
  44. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1606-1. https://doi.org/10.1594/PANGAEA.712300
  45. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1606-1. https://doi.org/10.1594/PANGAEA.712281
  46. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1606-2. https://doi.org/10.1594/PANGAEA.712243
  47. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1607-1. https://doi.org/10.1594/PANGAEA.712261
  48. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1607-1. https://doi.org/10.1594/PANGAEA.712301
  49. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1607-2. https://doi.org/10.1594/PANGAEA.712244
  50. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1609-2. https://doi.org/10.1594/PANGAEA.712262
  51. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1609-2. https://doi.org/10.1594/PANGAEA.712302
  52. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1611-1. https://doi.org/10.1594/PANGAEA.712211
  53. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1611-1. https://doi.org/10.1594/PANGAEA.712263
  54. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1611-1. https://doi.org/10.1594/PANGAEA.712303
  55. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1611-4. https://doi.org/10.1594/PANGAEA.712245
  56. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1613-2. https://doi.org/10.1594/PANGAEA.712264
  57. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1613-2. https://doi.org/10.1594/PANGAEA.712304
  58. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1613-3. https://doi.org/10.1594/PANGAEA.712246
  59. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1619-1. https://doi.org/10.1594/PANGAEA.712265
  60. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1619-1. https://doi.org/10.1594/PANGAEA.712305
  61. Schlüter, M (1990): (Appendix 2.1) pH profile of sediment core PS1619-1. https://doi.org/10.1594/PANGAEA.712410
  62. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1620-2. https://doi.org/10.1594/PANGAEA.712266
  63. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1620-2. https://doi.org/10.1594/PANGAEA.712306
  64. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1622-1. https://doi.org/10.1594/PANGAEA.712267
  65. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1622-1. https://doi.org/10.1594/PANGAEA.712307
  66. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1622-2. https://doi.org/10.1594/PANGAEA.712360
  67. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1622-2. https://doi.org/10.1594/PANGAEA.712393
  68. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1622-2. https://doi.org/10.1594/PANGAEA.712285
  69. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1625-1. https://doi.org/10.1594/PANGAEA.712212
  70. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1625-1. https://doi.org/10.1594/PANGAEA.712268
  71. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1625-1. https://doi.org/10.1594/PANGAEA.712308
  72. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1625-2. https://doi.org/10.1594/PANGAEA.712247
  73. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1626-1. https://doi.org/10.1594/PANGAEA.712269
  74. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1626-1. https://doi.org/10.1594/PANGAEA.712309
  75. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1635-2. https://doi.org/10.1594/PANGAEA.712213
  76. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1635-2. https://doi.org/10.1594/PANGAEA.712270
  77. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1635-2. https://doi.org/10.1594/PANGAEA.712310
  78. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1635-2. https://doi.org/10.1594/PANGAEA.712287
  79. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1635-3. https://doi.org/10.1594/PANGAEA.712397
  80. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1635-3. https://doi.org/10.1594/PANGAEA.712248
  81. Schlüter, M (1990): (Appendix 2.4) Porosity of sediment core PS1635-3. https://doi.org/10.1594/PANGAEA.712234
  82. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1636-1. https://doi.org/10.1594/PANGAEA.712238
  83. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1636-1. https://doi.org/10.1594/PANGAEA.712311
  84. Schlüter, M (1990): (Appendix 2.1) pH profile of sediment core PS1636-1. https://doi.org/10.1594/PANGAEA.712239
  85. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1636-2. https://doi.org/10.1594/PANGAEA.712249
  86. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1637-2. https://doi.org/10.1594/PANGAEA.712214
  87. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1637-2. https://doi.org/10.1594/PANGAEA.712312
  88. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1637-2. https://doi.org/10.1594/PANGAEA.712250
  89. Schlüter, M (1990): (Appendix 2.2) Calcium carbonate and organic carbon of sediment core PS1638-1. https://doi.org/10.1594/PANGAEA.712215
  90. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1638-1. https://doi.org/10.1594/PANGAEA.712272
  91. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1638-1. https://doi.org/10.1594/PANGAEA.712313
  92. Schlüter, M (1990): (Appendix 2.1) pH profile of sediment core PS1638-1. https://doi.org/10.1594/PANGAEA.712240
  93. Schlüter, M (1990): (Appendix 2.3) Lead210 of sediment core PS1638-2. https://doi.org/10.1594/PANGAEA.712230
  94. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1638-2. https://doi.org/10.1594/PANGAEA.712404
  95. Schlüter, M (1990): (Appendix 2.4) Porosity of sediment core PS1638-2. https://doi.org/10.1594/PANGAEA.712235
  96. Schlüter, M (1990): (Appendix 2.3) Lead210 of sediment core PS1638-3. https://doi.org/10.1594/PANGAEA.712231
  97. Schlüter, M (1990): (Appendix 2.1) Formation factor of sediment core PS1639-1. https://doi.org/10.1594/PANGAEA.712273
  98. Schlüter, M (1990): (Appendix 2.1) Geochemistry on sediment core PS1639-1. https://doi.org/10.1594/PANGAEA.712314
  99. Schlüter, M (1990): (Appendix 2.1) pH profile of sediment core PS1639-1. https://doi.org/10.1594/PANGAEA.712290
  100. Schlüter, M (1990): (Appendix 2.1) Oxygen content in porewater of sediment core PS1639-2. https://doi.org/10.1594/PANGAEA.712405

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