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Hurd, David C (1973): Physical, chemical and geological properties of sediments from the central equatorial Pacific [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.735133, Supplement to: Hurd, DC (1973): Interactions of biogenic opal, sediment and seawater in the Central Equatorial Pacific. Geochimica et Cosmochimica Acta, 37(10), 2257-2266, https://doi.org/10.1016/0016-7037(73)90103-8

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Abstract:
The solution rate of biogenic opal in near-surface sediments in the Central Equatorial Pacific is three to eight orders of magnitude lower than similar acid-cleaned samples. Iron, magnesium and calcium aluminosilicates may be the minerals which are forming on the surface of the opal and reducing its solution rate. The scale height of the system studied suggests that diffusive and not advective processes are primarily responsible for the removal of dissolved silica in sediments. Solution budget calculations for this area suggest that 90-99 per cent of the biogenic opal produced in surface waters dissolves before reaching the sediment-water interface; an additional amount dissolves within the sediment and diffuses into bottom waters leaving 0.05-0.15 per cent of the original amount of opal produced by organisms in the sedimentary record. The relative solution potential of the upper 1000 m of the water column varies by more than an order of magnitude from the Antarctic to Equator and may have a pronounced effect on the accumulation rate of biogenic opal in underlying sediments.
Project(s):
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: 5.703854 * Median Longitude: 171.241100 * South-bound Latitude: -0.516700 * West-bound Longitude: 145.650000 * North-bound Latitude: 11.633300 * East-bound Longitude: -163.333000
Date/Time Start: 1970-01-01T00:00:00 * Date/Time End: 1970-01-01T00:00:00
Event(s):
Hurd_90 * Latitude: 2.766700 * Longitude: 145.650000 * Date/Time: 1970-01-01T00:00:00 * Elevation: -4525.0 m * Method/Device: Free fall corer (FFC)
Hurd_91 * Latitude: 1.866700 * Longitude: 151.517000 * Date/Time: 1970-01-01T00:00:00 * Elevation: -4810.0 m * Method/Device: Free fall corer (FFC)
Hurd_92 * Latitude: -0.516700 * Longitude: 161.817000 * Date/Time: 1970-01-01T00:00:00 * Elevation: -4250.0 m * Method/Device: Free fall corer (FFC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
13 datasets

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Datasets listed in this publication series

  1. Hurd, DC (1973): (Appendix A 1) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_90. https://doi.org/10.1594/PANGAEA.64432
  2. Hurd, DC (1973): (Appendix A 2) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_91. https://doi.org/10.1594/PANGAEA.64433
  3. Hurd, DC (1973): (Appendix A 3) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_92. https://doi.org/10.1594/PANGAEA.64434
  4. Hurd, DC (1973): (Appendix A 4) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_93. https://doi.org/10.1594/PANGAEA.64435
  5. Hurd, DC (1973): (Appendix A 5) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_94. https://doi.org/10.1594/PANGAEA.64436
  6. Hurd, DC (1973): (Appendix A 6) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_95. https://doi.org/10.1594/PANGAEA.64437
  7. Hurd, DC (1973): (Appendix A 7) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_96. https://doi.org/10.1594/PANGAEA.64438
  8. Hurd, DC (1973): (Appendix A 8) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_97. https://doi.org/10.1594/PANGAEA.64439
  9. Hurd, DC (1973): (Appendix A 9) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_98. https://doi.org/10.1594/PANGAEA.64440
  10. Hurd, DC (1973): (Appendix A 10) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_99. https://doi.org/10.1594/PANGAEA.64441
  11. Hurd, DC (1973): (Appendix A 11) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_100. https://doi.org/10.1594/PANGAEA.64442
  12. Hurd, DC (1973): (Appendix A 12) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_101. https://doi.org/10.1594/PANGAEA.735126
  13. Hurd, DC (1973): (Appendix A 13) Physical, chemical and geological properties related to solution and diffusion in sediment core Hurd_102. https://doi.org/10.1594/PANGAEA.64443