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Microbiology of ancient and modern hydrothermal systems
Trends in Microbiology, 2001Hydrothermal systems have prevailed throughout geological history on earth, and ancient ARCHAEAN hydrothermal deposits could provide clues to understanding earth's earliest biosphere. Modern hydrothermal systems support a plethora of microorganisms and macroorganisms, and provide good comparisons for paleontological interpretation of ancient ...
A L, Reysenbach, S L, Cady
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Hydrothermal Systems in Small Ocean Planets
Astrobiology, 2007We examine means for driving hydrothermal activity in extraterrestrial oceans on planets and satellites of less than one Earth mass, with implications for sustaining a low level of biological activity over geological timescales. Assuming ocean planets have olivine-dominated lithospheres, a model for cooling-induced thermal cracking shows how variation ...
Vance, Steve +5 more
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Thermodynamics of strecker synthesis in hydrothermal systems
Origins of Life and Evolution of the Biosphere, 1995Submarine hydrothermal systems on the early Earth may have been the sites from which life emerged. The potential for Strecker synthesis to produce biomolecules (amino and hydroxy acids) from starting compounds (ketones, aldehydes, HCN and ammonia) in such environments is evaluated quantitatively using thermodynamic data and parameters for the revised ...
M, Schulte, E, Shock
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Eukaryotic organisms of continental hydrothermal systems
Extremophiles, 2019Continental hydrothermal systems are a dynamic component of global thermal and geochemical cycles, exerting a pronounced impact on water chemistry and heat storage. As such, these environments are commonly classified by temperature, thermal fluid ionic concentration, and pH.
Sabrina R, Brown, Sherilyn C, Fritz
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Short-Term Operation of Hydrothermal Systems
IFAC Proceedings Volumes, 1987Abstract The objective of short-term operation is to produce a daily schedule for each reservoir that meets the system operating constraints (water balance, bounds on volumes and outflows) and the generation targets established by longer-term scheduling models.
L.M.V.G. Pinto, M.V.F. Pereira
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Biological Potential of Martian Hydrothermal Systems
Astrobiology, 2003A source of energy to power metabolism may be a limiting factor in the abundance and spatial distribution of past or extant life on Mars. Although a global average of chemical energy available for microbial metabolism and biomass production on Mars has been estimated previously, issues of how the energy is distributed and which particular environments ...
E S, Varnes, B M, Jakosky, T M, McCollom
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The Thermodynamics of Hydrothermal Systems
1998Abstract The basic problem of thermodynamics is the determination of the equilibrium state that eventually results after the removal of internal constraints in a closed composite system. – Callen (1960), p. 24. Anyone studying an ore deposit winds up with a lot of data: field observations in the form of maps ...
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Be and Be in Submarine Hydrothermal Systems
1991The solution chemistry of the hydrothermal fluids emanating from sediment covered ridges is distinct from that observed on the open ridges where the solutions exit directly from basalt. Differences in composition are believed to result from interaction of a “primary” hydrothermal fluid, similar in composition to that characteristic of sediment-starved ...
D. L. Bourlés +3 more
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Theory of Hydrothermal Systems
Annual Review of Earth and Planetary Sciences, 1984Hydrothermal systems are sets of processes that redistribute energy and mass in response to circulating H20 fluids. These systems are active today in the oceanic and continental crusts, and their fossilized equivalents constitute a substantial portion of the geologic record.
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Complexation of Si in hydrothermal systems
Chinese Journal of Geochemistry, 2001The Au-SiO2 and Sn-SiO2 complexes have been experimentally calibrated at varying temperature, silica concentration and pH: Open image in new window Compared with Au-Cl, Au-HS and Sn-OH complexes, AuH3SiO4 and Sn(H3SiO4)4 complexes can be recognized as the dominant transport forms in Si-bearing solutions under pH and Eh conditions of general interest.
Wenling Fan +3 more
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