A Serpentinite-Hosted Ecosystem: The Lost City Hydrothermal Field

  title={A Serpentinite-Hosted Ecosystem: The Lost City Hydrothermal Field},
  author={D. Kelley and J. Karson and G. Früh-Green and D. Yoerger and T. Shank and D. Butterfield and J. Hayes and M. Schrenk and E. Olson and G. Proskurowski and M. Jakuba and A. Bradley and B. Larson and K. Ludwig and D. Glickson and K. Buckman and W. Brazelton and K. Roe and M. Elend and A. Delacour and S. Bernasconi and M. Lilley and J. Baross and R. Summons and S. Sylva},
  pages={1428 - 1434}
The serpentinite-hosted Lost City hydrothermal field is a remarkable submarine ecosystem in which geological, chemical, and biological processes are intimately interlinked. Reactions between seawater and upper mantle peridotite produce methane- and hydrogen-rich fluids, with temperatures ranging from <40° to 90°C at pH 9 to 11, and carbonate chimneys 30 to 60 meters tall. A low diversity of microorganisms related to methane-cycling Archaea thrive in the warm porous interiors of the edifices… Expand
Microbial utilization of abiogenic carbon and hydrogen in a serpentinite-hosted system
Abstract Mantle rocks exposed on the seafloor constitute a highly reactive chemical and thermal system, in which interaction with seawater to produce serpentinite has major consequences forExpand
Sources of organic nitrogen at the serpentinite-hosted Lost City hydrothermal field.
The source and cycling of organic nitrogen at an oceanic serpentinizing environment, the Lost City hydrothermal field, is investigated and data indicate nitrogen is readily available to microbial communities at Lost City. Expand
Evidence for archaeal methanogenesis within veins at the onshore serpentinite-hosted Chimaera seeps, Turkey
Abstract Serpentinite-hosted ecosystems are potential sites where life may first have evolved on Earth. Serpentinization reactions produce strongly reducing and highly alkaline fluids that areExpand
Abiogenic Hydrocarbon Production at Lost City Hydrothermal Field
Concentration, and stable and radiocarbon isotope, data from hydrocarbons dissolved in hydrogen-rich fluids venting at the ultramafic-hosted Lost City Hydrothermal Field show a distinct “inverse” trend in the stable carbon and hydrogen isotopic composition of C1 to C4 hydrocars, compatible with FTT genesis. Expand
Fossil evidence for serpentinization fluids fueling chemosynthetic assemblages
This finding shows that serpentinization-related fluids, unaffected by high-temperature hydrothermal circulation, can occur on-axis and are able to sustain high-biomass communities. Expand
Hydrothermal vents and the origin of life
Submarine hydrothermal vents are geochemically reactive habitats that harbour rich microbial communities. There are striking parallels between the chemistry of the H2–CO2 redox couple that is presentExpand
Serpentinization and carbon sequestration: A study of two ancient peridotite-hosted hydrothermal systems
Fluid circulation in peridotite-hosted hydrothermal systems influences the incorporation of carbon into the oceanic crust and its long-term storage. At low to moderate temperatures, serpentinizationExpand
Microbial ecology of the newly discovered serpentinite-hosted Old City hydrothermal field (southwest Indian ridge)
The microbial ecology of the ‘Lost City’-type Old City hydrothermal field, recently discovered along the southwest Indian ridge, is presented and this first description of its microbial ecology opens up attractive perspectives for understanding environmental factors shaping communities and metabolisms in oceanic serpentinite-hosted ecosystems. Expand
Fluid mixing and the deep biosphere of a fossil Lost City-type hydrothermal system at the Iberia Margin
Examination of fossil microbial communities and fluid mixing processes in the subseafloor of a Cretaceous Lost City-type hydrothermal system at the magma-poor passive Iberia Margin appears that, wherever they occur, they can support microbial life, even in deep subseAFloor environments. Expand
A serpentinite-hosted ecosystem in the Southern Mariana Forearc
The SSF appears to be a serpentinite-hosted ecosystem within a forearc (convergent margin) setting that is supported by fault-controlled fluid pathways connected to the decollement of the subducting slab, and supports the prediction that serpentinization of peridotite vents may be widespread on the ocean floor. Expand


Low archaeal diversity linked to subseafloor geochemical processes at the Lost City Hydrothermal Field, Mid-Atlantic Ridge.
First analyses of microbial communities inhabiting carbonate chimneys awash in warm, high pH fluids at the LCHF and the predominance of a single group of methane-metabolizing Archaea are reported, expanding the range of known geological settings that support biological activity to include submarine hydrothermal systems that are not dependent upon magmatic heat sources. Expand
Hydrothermal serpentinization of peridotite within the oceanic crust: Experimental investigations of mineralogy and major element chemistry
Abstract Mantle derived ultramafic rocks form a significant portion of lithosphere created at slow-spreading mid-ocean ridges. These rocks are ubiquitously serpentinized, due at least in part toExpand
Volcanoes, Fluids, and Life at Mid-Ocean Ridge Spreading Centers
▪ Abstract The recent recognition of a potentially vast, unexplored hot microbial biosphere associated with active volcanism along the global mid-ocean ridge network has fundamentally shiftedExpand
Anomalous CH4 and NH4+ concentrations at an unsedimented mid-ocean-ridge hydrothermal system
SINCE the discovery in 1977 of sea-floor hydrothermal systems, the study of the chemistry of the venting fluids has transformed our understanding of the geochemical cycles that influence theExpand
Hydrogen generation from mantle source rocks in Oman
Hydrogen gas, associated with Ca2+ OH-rich alkaline groundwaters (pH = 10–12), is at present emanating from ultramafic rocks of the Oman ophiolite. Isotopic and chemical evidence indicates thatExpand
Distinguishing ultramafic‐from basalt‐hosted submarine hydrothermal systems by comparing calculated vent fluid compositions
Submarine hydrothermal vent fluid compositions may be controlled by peridotite-seawater or basalt-seawater reactions. Previous studies of slow-spreading ridges indicate that in addition to basalts,Expand
Discovery of abundant hydrothermal venting on the ultraslow-spreading Gakkel ridge in the Arctic Ocean
Evidence for active hydrothermal venting on the Gakkel ridge is presented, which is the slowest spreading and least explored mid-ocean ridge and requires a reassessment of the geologic conditions that control hydroThermal circulation on ultraslow-spreading ridges. Expand
Mariana blueschist mud volcanism: Implications for conditions within the subduction zone
Several recently discovered active mud volcanoes on the nonaccretionary Mariana convergent plate margin are erupting slab-derived fluids, serpentine mud, and metamorphosed rocks from depths of asExpand
Influence of sea-floor spreading on the global hydrothermal vent fauna
ONE remarkable discovery of recent decades is the presence of hundreds of unusual species, including fourteen new families, at hydrothermal vents. These animals, unknown from other habitats, live inExpand
Geologic implications of seawater circulation through peridotite exposed at slow-spreading mid-ocean ridges
Peridotite denuded by tectonic extension and exposed at the seafloor adjacent to slow-spreading centers hosts hydrothermal circulation of seawater. The reaction of seawater with peridotite causesExpand