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- W3186398675 abstract "Summary The Guaymas Basin (GB) in the Gulf of California is a young rift system where hot basaltic sill intrusions into unconsolidated organic-rich sediments lead to the generation of complex petroleum compounds and discharge of bioavailable dissolved organic matter (DOM) into the overlying water column. However, the contribution of hydrothermal heating to the release of recalcitrant DOM, for instance polycondensed aromatic compounds (PCAs), has not been studied yet. PCAs such as dissolved black carbon in marine DOM are thought to be mainly derived from incomplete combustion of terrestrial organic matter on land and accumulate in the oceanic carbon reservoir over thousands of years. Recent research, however, points to additional sources with a marine isotopic signature, for instance petrogenic carbon. In our study, we investigate whether hydrothermally heated sediments release DOM that can contribute to the recalcitrant oceanic DOM pool. We simulated hot-water discharge events by Soxhlet extraction of sediment core samples from GB sites with in situ temperatures up to >105°C and analyzed DOM by ultra-high resolution mass spectrometry (FT-ICR-MS) and optical spectroscopy. Our preliminary results suggest that hydrothermal mobilization of DOM from organic-rich sediments can release aromatic and sulfur-enriched compounds that may contribute to the recalcitrant deep oceanic DOM pool." @default.
- W3186398675 created "2021-08-02" @default.
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- W3186398675 date "2021-01-01" @default.
- W3186398675 modified "2023-09-27" @default.
- W3186398675 title "Characteristics of dissolved organic matter released by hot-water extraction of organic-rich Guaymas Basin sediments" @default.
- W3186398675 doi "https://doi.org/10.3997/2214-4609.202134234" @default.
- W3186398675 hasPublicationYear "2021" @default.
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