Identification of organic compounds in ocean basement fluids


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Boris.Koch [ at ] awi.de

Abstract

We have analyzed the dissolved organic carbon, OC, in ocean basement fluids using Fourier Transform-Ion Cyclotron Resonance-Mass Spectrometry (FT-ICR-MS). The compounds identified at the two sites, near the Juan de Fuca and Mid-Atlantic Ridges (North Pond), differ substantially from each other and from seawater. Compared to Juan de Fuca, North Pond organics had a lower average molecular weight (349 vs. 372 g/mol), 50% more identifiable compounds (2181 vs. 1482), and demonstrably lower average nominal oxidation state of carbon (-0.70 vs. -0.56). The North Pond fluids were also found to have many more Nand S-bearing compounds. Based on our data, the marine subsurface can alter the types of dissolved OC, DOC, compounds in seawater.



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ISI/Scopus peer-reviewed
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Published
Eprint ID
45535
DOI 10.1016/j.orggeochem.2017.07.017

Cite as
LaRowe, D. E. , Koch, B. P. , Robador, A. , Witt, M. , Ksionzek, K. B. and Amend, J. P. (2017): Identification of organic compounds in ocean basement fluids , Organic Geochemistry, 113 , pp. 124-127 . doi: 10.1016/j.orggeochem.2017.07.017


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