 |
Conference papers
Abiogenic formation of H2, light hydrocarbons and other short-chain organic compounds within the serpentinite mud volcanoes of the Marianna Trench
Abstract : Serpentinite-hosting mud volcanoes, located in the Marianna forearc subduction zone, were drilled during IODP Expedition 366. Recovered samples from Asùt Tesoru seamount provide new insights on the generation of organic matter in deep environments. Short-chain alcohols, volatile fatty acids and light hydrocarbons are produced within hyperalkaline pore fluids (pH 12.5) rich in H2. The stable isotope values of those species show heavy δ 13 C values, suggesting a formation process through Fischer-Tropsch-Type reactions. This close isotopic study brings new constraints on the reaction pathways leading to the formation of not only light hydrocarbons, but also of short-chain organic molecules. These compounds may serve as precursors of building blocks essential to life in deep oceanic settings.
Cited literature [3 references]
https://hal-ifp.archives-ouvertes.fr/hal-02395935
Contributor : Nadine Couëdel Connect in order to contact the contributor
Submitted on : Thursday, December 5, 2019 - 5:22:06 PM
Last modification on : Wednesday, November 3, 2021 - 6:18:58 AM
Long-term archiving on: : Friday, March 6, 2020 - 7:31:54 PM
Contributor : Nadine Couëdel Connect in order to contact the contributor
Submitted on : Thursday, December 5, 2019 - 5:22:06 PM
Last modification on : Wednesday, November 3, 2021 - 6:18:58 AM
Long-term archiving on: : Friday, March 6, 2020 - 7:31:54 PM
File
e3sconf_wri-162018_02011.pdf
Files produced by the author(s)