Geochemical Bioenergetics during Low-Temperature Serpentinization: An Example from the Samail Ophiolite, Sultanate of Oman
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Geophysical Research"
DOI: 10.1002/2017jg003825
Abstract: Abstract Various classes of microbial and biomolecular evidence from global studies in marine and continental settings are used to identify a set of reactions that appear to support microbial metabolism during serpentinization of ultramafic rocks.… read more here.
Keywords: serpentinization; low temperature; samail ophiolite; temperature serpentinization ... See more keywords
Linking serpentinization, hyperalkaline mineral waters and abiotic methane production in continental peridotites: an integrated hydrogeological-bio-geochemical model from the Cabeço de Vide CH4-rich aquifer (Portugal)
Sign Up to like & getrecommendations! Published in 2018 at "Applied Geochemistry"
DOI: 10.1016/j.apgeochem.2018.07.011
Abstract: Abstract Continental active serpentinization of ultramafic rocks is today recognized as a key process triggering a sequence of phenomena involving the passage from inorganic, to organic and metabolic reactions. These may have a role in… read more here.
Keywords: serpentinization; hyperalkaline mineral; production; waters abiotic ... See more keywords
Serpentinization of olivine at 300 °C and 500 bars: An experimental study examining the role of silica on the reaction path and oxidation state of iron
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Geology"
DOI: 10.1016/j.chemgeo.2017.11.006
Abstract: Abstract The generation of H 2 during serpentinization of ultramafic oceanic crust along Earth's mid-ocean ridges provides a key energy source for the deep biosphere and has important implications for metal transport and mineral stability… read more here.
Keywords: serpentinization; oxidation; 500 bars; chemistry ... See more keywords
Chronology of serpentinization: Paleomagnetic evidence for 20 Ma serpentinization of the Oeyama ophiolite, Wakasa, Southwest Japan
Sign Up to like & getrecommendations! Published in 2021 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2020.116656
Abstract: Abstract Serpentinization of mantle peridotite generates magnetite that is able to acquire a remanent magnetization parallel to the ambient geomagnetic field. The paleomagnetic direction of serpentine provides insights as to the timing of serpentinization. This… read more here.
Keywords: serpentinization; direction; oeyama ophiolite; ophiolite wakasa ... See more keywords
On the hydration of olivine in ultramafic rocks: Implications from Fe isotopes in serpentinites
Sign Up to like & getrecommendations! Published in 2017 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2017.07.011
Abstract: Abstract The behavior of Fe during serpentinization largely controls the potential for oxidation-reduction reactions and energy budget for serpentinite-hosted microbial communities. We present Fe isotope data for mineral separates from a partially serpentinized dunite from… read more here.
Keywords: serpentinization; isotope; mineral separates; hydration olivine ... See more keywords
Anomalous Sound Velocities of Antigorite at High Pressure and Implications for Detecting Serpentinization at Mantle Wedges
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Research Letters"
DOI: 10.1029/2019gl082287
Abstract: Elastic properties of antigorite are important for interpretation of seismic mapping of serpentinization in the mantle wedge above subducting slabs. The compressional (VP) and shear (VS) wave velocities in pure antigorite aggregates were measured simultaneously… read more here.
Keywords: sound velocities; serpentinization mantle; anomalous sound; serpentinization ... See more keywords
Mantle hydration along outer-rise faults inferred from serpentinite permeability
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-14309-9
Abstract: Recent geophysical surveys indicate that hydration (serpentinization) of oceanic mantle is related to outer-rise faulting prior to subduction. The serpentinization of oceanic mantle influences the generation of intermediate-depth earthquakes and subduction water flux, thereby promoting… read more here.
Keywords: serpentinization; outer rise; along outer; oceanic mantle ... See more keywords
Narrowing gaps between Earth and life
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2216017119
Abstract: Life is a chemical reaction. For 4 billion years (1), all microbial cells have required a source of carbon, energy, and electrons to power energy-releasing reactions forward toward growth. How did the first cells grow,… read more here.
Keywords: serpentinization; water; energy; life ... See more keywords
Observational constraints on the process and products of Martian serpentinization
Sign Up to like & getrecommendations! Published in 2023 at "Science Advances"
DOI: 10.1126/sciadv.add8472
Abstract: The alteration of olivine-rich rocks to serpentine minerals, (hydr)oxides, and aqueous hydrogen through serpentinization is long thought to have influenced the distribution of habitable environments on early Mars and the evolution of the early Martian… read more here.
Keywords: serpentinization; iron; process products; products martian ... See more keywords
Serpentinization-Influenced Groundwater Harbors Extremely Low Diversity Microbial Communities Adapted to High pH
Sign Up to like & getrecommendations! Published in 2017 at "Frontiers in Microbiology"
DOI: 10.3389/fmicb.2017.00308
Abstract: Serpentinization is a widespread geochemical process associated with aqueous alteration of ultramafic rocks that produces abundant reductants (H2 and CH4) for life to exploit, but also potentially challenging conditions, including high pH, limited availability of… read more here.
Keywords: serpentinization; carbon; diversity; influenced groundwater ... See more keywords
An examination of protist diversity in serpentinization-hosted ecosystems of the Samail Ophiolite of Oman
Sign Up to like & getrecommendations! Published in 2023 at "Frontiers in Microbiology"
DOI: 10.3389/fmicb.2023.1139333
Abstract: In the Samail Ophiolite of Oman, the geological process of serpentinization produces reduced, hydrogen rich, hyperalkaline (pH > 11) fluids. These fluids are generated through water reacting with ultramafic rock from the upper mantle in… read more here.
Keywords: serpentinization; serpentinized fluids; samail ophiolite; diversity ... See more keywords