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Lin, Yu-Shih; Koch, Boris P; Feseker, Tomas; Ziervogel, Kai; Goldhammer, Tobias; Schmidt, Frauke; Witt, Matthias; Kellermann, Matthias Y; Zabel, Matthias; Teske, Andreas P; Hinrichs, Kai-Uwe (2020): Sedimentary dissolved organic matter of the Guaymas Basin. PANGAEA, https://doi.org/10.1594/PANGAEA.922587

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Abstract:
Ocean margin sediments have been considered as important sources of dissolved organic carbon (DOC) to the deep ocean, yet the contribution from advective settings has just started to be acknowledged. Here we present evidence showing that near-surface heating of sediment in the Guaymas Basin, a young extensional depression, causes mass production and discharge of reactive dissolved organic matter (DOM). In the sediment heated up to ~100 °C, we found unexpectedly low DOC concentrations in the pore waters, reflecting the combined effect of thermal desorption and advective fluid flow. Heating experiments suggested DOC production to be a rapid, abiotic process with the DOC concentration increasing exponentially with temperature. The high proportions of total hydrolyzable amino acids and presence of chemical species affiliated with activated hydrocarbons, carbohydrates and peptides indicate high reactivity of the DOM. Model simulation suggests that at the local scale, near-surface heating of sediment creates short and massive DOC discharge events that elevate the bottom-water DOC concentration. Because of the heterogeneous distribution of high heat flow areas, the expulsion of reactive DOM is spotty at any given time. We conclude that hydrothermal heating of young rift sediments alter deep-ocean budgets of bioavailable DOM, creating organic-rich habitats for benthic life.
Keyword(s):
Dissolved organic carbon; dissolved organic matter; FTICRMS; guaymas basin; total hydrolyzable dissolved amino acids
Supplement to:
Lin, Yu-Shih; Koch, Boris P; Feseker, Tomas; Ziervogel, Kai; Goldhammer, Tobias; Schmidt, Frauke; Witt, Matthias; Kellermann, Matthias Y; Zabel, Matthias; Teske, Andreas P; Hinrichs, Kai-Uwe (2017): Near-surface Heating of Young Rift Sediment Causes Mass Production and Discharge of Reactive Dissolved Organic Matter. Scientific Reports, 7(1), https://doi.org/10.1038/srep44864
Coverage:
Median Latitude: 27.008065 * Median Longitude: -111.408383 * South-bound Latitude: 27.007383 * West-bound Longitude: -111.409050 * North-bound Latitude: 27.009033 * East-bound Longitude: -111.407183
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19 datasets

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Datasets listed in this publication series

  1. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): CHN3-4O formulas in DOM from the non-sterilized samples of the heating experiment (Fig. S5b). https://doi.org/10.1594/PANGAEA.922584
  2. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): CHO formulas in DOM from the non-sterilized samples of the heating experiment (Fig. S5a). https://doi.org/10.1594/PANGAEA.922583
  3. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): CHO molecular formulas and relative intensity (Fig. 3a). https://doi.org/10.1594/PANGAEA.922347
  4. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): CHON molecular formulas and relative intensity (Fig. 3b). https://doi.org/10.1594/PANGAEA.922523
  5. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Concentrations of THDAA in the slurries of the heating experiments after 191 days of incubation, and the corresponding DI values (Fig. 2). https://doi.org/10.1594/PANGAEA.922346
  6. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Concentrations of sulfate and dissolved inorganic carbon in the experiments of non-sterilized sediment slurries after 191 days of incubation (Fig. S4). https://doi.org/10.1594/PANGAEA.922571
  7. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): DOC and incubation temperature (Fig. 1b). https://doi.org/10.1594/PANGAEA.922394
  8. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): DOC measurements of dives 4567 (core 27) and 4568 (core 1) (Fig. 1a). https://doi.org/10.1594/PANGAEA.922312
  9. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): DOC profiles of cores from Alvin Dive 4569 (Fig. S2). https://doi.org/10.1594/PANGAEA.922561
  10. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Pore-water magnesium of Alvin Dive 4567 (core 27) and 4568 (core 1) (Fig. S3). https://doi.org/10.1594/PANGAEA.922563
  11. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Pore-water organic carbon content of Alvin Dive 4567 (core 27) and 4568 (core 1) (Fig. S3). https://doi.org/10.1594/PANGAEA.922566
  12. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Pore-water sulfate of Alvin Dive 4567 (core 27) and 4568 (core 1) (Fig. S3). https://doi.org/10.1594/PANGAEA.922564
  13. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Pore-water total sulfur content of Alvin Dive 4567 (core 27) and 4568 (core 1) (Fig. S3). https://doi.org/10.1594/PANGAEA.922565
  14. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Proportion of major molecular groups in DOM from the heating experiment (non-sterilized sediment slurries) (Fig. S6). https://doi.org/10.1594/PANGAEA.922585
  15. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Simulated efflux of DOC from sediment upon a heating event with the temperature regime represented by HF1 and HF5 of Dive 4568 (Fig. 4). https://doi.org/10.1594/PANGAEA.922525
  16. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Temperature heat flow measurements of Alvin dives 4567 and 4568 (Fig. 1a). https://doi.org/10.1594/PANGAEA.922311
  17. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Temperature profiles of Alvin Dive 4569 (Fig. S2 ). https://doi.org/10.1594/PANGAEA.922559
  18. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Water-extractable DOC Soxhelet measurements of dives 4567 (core 27) and 4568 (core 1) (Fig. 1a). https://doi.org/10.1594/PANGAEA.922314
  19. Lin, Y-S; Koch, BP; Feseker, T et al. (2020): Water-extractable DOC batch measurements of dives 4567 (core 27) and 4568 (core 1) (Fig. 1a). https://doi.org/10.1594/PANGAEA.922313