Jeffrey S. Seewald

TL;DR: Comparison of the endmember gas and oil composition with the composition of water column samples showed that the plume was preferentially enriched with water-soluble components, indicating that aqueous dissolution played a major role in plume formation, whereas the fates of relatively insoluble petroleum components were initially controlled by other processes.

TL;DR: These findings suggest that petroleum generation and stability is influenced by subsurface chemical environments, and is a simple function of time, temperature and the composition of sedimentary organic matter.

TL;DR: In this article, an experimental study of the reaction of dissolved CO2 in the presence of olivine under hydrothermal conditions (300°C, 350 bar) was conducted, and the results indicated that the potential for abiotic formation of hydrocarbons during serpentinization may be much more limited than previously believed.

TL;DR: In this article, the isotopic composition of organic compounds synthesized by abiotic processes under hydrothermal conditions was evaluated and it was shown that carbon isotopic compositions may not be a particularly effective diagnostic means to differentiate between biologic and non-biologic sources.