Molecular hydrogen in surface and subsurface natural gases: Abundance, origins and ideas for deliberate exploration

AV Milkov - Earth-Science Reviews, 2022 - Elsevier
Geologic molecular hydrogen (H 2) occurs in the subsurface and vents and seeps at the
surface. However, this valuable natural resource is under-utilized in the economy because …

[HTML][HTML] The rock-hosted biosphere

AS Templeton, TA Caro - Annual Review of Earth and Planetary …, 2023 - annualreviews.org
Our understanding of Earth's rock-hosted subsurface biosphere has advanced over the past
two decades through the collection and analysis of fluids and rocks from aquifers within the …

Deep-branching acetogens in serpentinized subsurface fluids of Oman

DR Colman, EA Kraus, PH Thieringer… - Proceedings of the …, 2022 - National Acad Sciences
Little is known of acetogens in contemporary serpentinizing systems, despite widely
supported theories that serpentinite-hosted environments supported the first life on Earth via …

Accessing the subsurface biosphere within rocks undergoing active low‐temperature serpentinization in the Samail ophiolite (Oman Drilling Project)

AS Templeton, ET Ellison, C Glombitza… - Journal of …, 2021 - Wiley Online Library
Abstract The Oman Drilling Project established an “Active Alteration” multi‐borehole
observatory in peridotites undergoing low‐temperature serpentinization in the Samail …

Metabolic strategies shared by basement residents of the Lost City hydrothermal field

WJ Brazelton, JM McGonigle, S Motamedi… - Applied and …, 2022 - Am Soc Microbiol
Alkaline fluids venting from chimneys of the Lost City hydrothermal field flow from a
potentially vast microbial habitat within the seafloor where energy and organic molecules …

H2 and CH4 outgassing rates in the Samail ophiolite, Oman: implications for low-temperature, continental serpentinization rates

JA Leong, M Nielsen, N McQueen, R Karolytė… - … et Cosmochimica Acta, 2023 - Elsevier
Abstract Reduced (H 2-and CH 4-rich) and hyperalkaline fluids are products of subsurface
reactions accompanying serpentinization of ultramafic rocks. H 2 and CH 4 produced during …

Initial results from the Oman drilling project multi‐borehole observatory: Petrogenesis and ongoing alteration of mantle peridotite in the weathering horizon

PB Kelemen, JA Leong… - Journal of …, 2021 - Wiley Online Library
Abstract The Oman Drilling Project “Multi‐Borehole Observatory”(MBO) samples an area of
active weathering of tectonically exposed peridotite. This article reviews the geology of the …

Low‐temperature hydrogen formation during aqueous alteration of serpentinized peridotite in the Samail ophiolite

ET Ellison, AS Templeton, SD Zeigler… - Journal of …, 2021 - Wiley Online Library
Serpentinized peridotite is reacting with groundwater in the subsurface of the Samail
ophiolite in Oman. Although these rocks are partially to completely serpentinized, they …

[HTML][HTML] Subsurface biogeochemical cycling of nitrogen in the actively serpentinizing Samail Ophiolite, Oman

KR Rempfert, DB Nothaft, EA Kraus… - Frontiers in …, 2023 - frontiersin.org
Nitrogen (N) is an essential element for life. N compounds such as ammonium (NH 4+) may
act as electron donors, while nitrate (NO 3-) and nitrite (NO 2-) may serve as electron …

Community-and genome-based evidence for a shaping influence of redox potential on bacterial protein evolution

JM Dick, D Meng - Msystems, 2023 - Am Soc Microbiol
Despite deep interest in how environments shape microbial communities, whether redox
conditions influence the sequence composition of genomes is not well known. We predicted …