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Kryc, Kelly A; Murray, Richard W; Murray, David W (2003): Chemistry of biogenic sediments from the equatorial Pacific [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.725451, Supplement to: Kryc, KA et al. (2003): Al-to-oxide and Ti-to-organic linkages in biogenic sediment: relationships to paleo-export production and bulk Al/Ti. Earth and Planetary Science Letters, 211(1-2), 125-141, https://doi.org/10.1016/S0012-821X(03)00136-5

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Abstract:
To increase our understanding of the mechanisms that control the distribution of Al and Ti within marine sediment, we performed sequential extractions targeting the chemical signatures of the loosely bound, exchangeable, carbonate, oxide, organic, opal, and residual fraction of sediment from a carbonate-dominated regime (equatorial Pacific) and from a mixed opal-terrigenous regime (West Antarctic Peninsula). We observe a systematic partitioning of Al and Ti between sediment phases that is related to bulk Al/Ti. We show that, where we can quantify an Al(excess) component, the dissolved Al is preferentially affiliated with the oxide fraction, resulting in Al/Ti molar ratios of 500-3000. This is interpreted as the result of surface complexation in the water column of dissolved Al onto oxyhydroxides. We also observe a previously undetected Ti(excess) with as much as 80% of the total Ti in the organic fraction, which is most likely a function of metal-organic colloidal removal from the water column. In samples where the excess metals are obscured by the detrital load, the Al and Ti are almost exclusively found in the residual phase. This argues for the paired removal of Al (preferentially by the oxide component) and Ti (preferentially by the organic component) from the water column by settling particulate matter. This research builds upon earlier work that shows changes in the bulk ratio of Al to Ti in carbonate sediment from the central-equatorial Pacific that coincide with changes in the sedimentary bulk accumulation rate (BAR). The ratios that are observed are as much as three times higher than typical shale values, and were interpreted as the result of scavenging of dissolved Al onto particles settling in the water column. Because this non-terrigenous Al(excess) accounts for up to 50% of the total sedimentary Al inventory and correlates best with BAR, the bulk Al/Ti may be a sensitive tracer of particle flux and, therefore, export production. Because we show that the excess metals are the result of scavenging processes, the bulk Al/Ti may be considered a sensitive proxy for this region.
Project(s):
Joint Global Ocean Flux Study (JGOFS)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -3.872049 * Median Longitude: -134.696418 * South-bound Latitude: -64.861930 * West-bound Longitude: -140.143300 * North-bound Latitude: 8.926700 * East-bound Longitude: -64.208000
Date/Time Start: 1992-11-03T13:00:00 * Date/Time End: 1998-03-13T00:00:00
Event(s):
178-1098B * Latitude: -64.861930 * Longitude: -64.208000 * Date/Time: 1998-03-13T00:00:00 * Elevation: -1010.6 m * Penetration: 43 m * Recovery: 44.66 m * Location: Drake Passage * Campaign: Leg178 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 43 m cored; 0 m drilled; 103.9 % recovery
TT013_4 (11031300 Multicorer1) * Latitude: -11.997300 * Longitude: -134.952200 * Date/Time: 1992-11-03T13:00:00 * Elevation: -4280.0 m * Location: Equatorial Pacific * Campaign: TT013 * Basis: Thomas G. Thompson * Method/Device: MultiCorer (MUC)
TT013_23 (11080952 Multicorer4) * Latitude: -1.867000 * Longitude: -139.800800 * Date/Time: 1992-11-08T09:52:00 * Elevation: -4380.0 m * Location: Equatorial Pacific * Campaign: TT013 * Basis: Thomas G. Thompson * Method/Device: MultiCorer (MUC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
17 datasets

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Datasets listed in this publication series

  1. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of sediments from ODP Hole. https://doi.org/10.1594/PANGAEA.725447
  2. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_4. https://doi.org/10.1594/PANGAEA.725435
  3. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_23. https://doi.org/10.1594/PANGAEA.725432
  4. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_27. https://doi.org/10.1594/PANGAEA.725433
  5. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of sediment core TT013_32. https://doi.org/10.1594/PANGAEA.725434
  6. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_41. https://doi.org/10.1594/PANGAEA.725436
  7. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_58. https://doi.org/10.1594/PANGAEA.725437
  8. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_63. https://doi.org/10.1594/PANGAEA.725438
  9. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_66. https://doi.org/10.1594/PANGAEA.725439
  10. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of sediment core TT013_72. https://doi.org/10.1594/PANGAEA.725440
  11. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_88. https://doi.org/10.1594/PANGAEA.725441
  12. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_93. https://doi.org/10.1594/PANGAEA.725442
  13. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_104. https://doi.org/10.1594/PANGAEA.725428
  14. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_113. https://doi.org/10.1594/PANGAEA.725429
  15. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of sediment core TT013_114. https://doi.org/10.1594/PANGAEA.725430
  16. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of marine surface sediments from Site TT013_148. https://doi.org/10.1594/PANGAEA.725431
  17. Kryc, KA; Murray, RW; Murray, DW (2003): (Appendix 1) Chemistry of sediment core W8803B-51GC. https://doi.org/10.1594/PANGAEA.725443