Submarine hydrothermal brine seeps off Milos, Greece. Observations and geochemistry

Fitzsimons, Mark F.; Dando, P. R.; Hughes, J.A.; Thiermann, Frank; Akoumianaki, Ioanna; Pratt, S.M.

doi:10.1016/s0304-4203(97)00021-2

Cited by 77 publications

(66 citation statements)

References 33 publications

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“…at 350° average velocity of 0.15 m/s at 21°N on the East Pacific Rise [102], at 400°C [103][104][105]; at 464°C at the Mid-Atlantic Ridge [106]), and (ii) coastal resources found at depths between 1 and 50 m. Both types of resources have been described in the scientific literature from all over the world; however this research did not target their use as energy resources (e.g., [107][108][109][110][111][112][113][114][115][116][117][118][119][120][121][122] [97,124]. Some rough estimates indicate that the full exploitation of the thermal potential of the entire volcanic district of the South Tyrrhenian Sea, could satisfy 7-10% of the actual Italian electricity demand [97,124].…”

Section: Submarine Geothermal Resourcesmentioning

confidence: 99%

Renewable energy-driven desalination technologies: A comprehensive review on challenges and potential applications of integrated systems

et al. 2015

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Despite the tremendous improvements in conventional desalination technologies, its wide use is still limited due primarily to high energy requirements which are currently met with expensive fossil fuels. The use of alternative energy sources is essential to meet the growing demand for water desalination. In the last few decades a lot of effort has being directed in the use of different renewable energy (RE) sources to run desalination processes. However, the expansion of these efforts towards larger scale plants is hampered by several techno-economic challenges. Several medium-scale RE-driven desalination plants have been installed worldwide. Nevertheless, most of these plants are connected to the electrical grid to assure a continuous energy supply for stable operation. Furthermore, RE is mostly used to produce electric power which can be used to run desalination systems. This review paper focusses on an integrated approach in using RE-driven with an emphasis on solar and geothermal desalination technologies. Innovative and sustainable desalination processes which are suitable for integrated RE systems are presented. An assessment of the benefits of these technologies and their limitations are also discussed.

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Section: Submarine Geothermal Resourcesmentioning

confidence: 99%

Renewable energy-driven desalination technologies: A comprehensive review on challenges and potential applications of integrated systems

et al. 2015

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“…Shallow-sea vent fluids also mix with seawater to establish redox gradients (Akerman et al, 2011;Amend et al, 2003a;Dando et al, 1999;Fitzsimons et al, 1997;Meyer-Dombard et al, 2011;Price and Pichler, 2005). Shallow-sea hydrothermal vents are generally defined as occurring at a water depth < 200 m, a depth which marks the deepest extent of the photic zone and coincides with a large change in the slope of the seawater boiling curve (Tarasov et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Subsurface hydrothermal processes and the bioenergetics of chemolithoautotrophy at the shallow-sea vents off Panarea Island (Italy)

et al. 2015

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Please cite this article as: Price, Roy E., LaRowe, Douglas E., Italiano, Francesco, Savov, Ivan, Pichler, Thomas, Amend, Jan P., Subsurface hydrothermal processes and the bioenergetics of chemolithoautotrophy at the shallow-sea vents off Panarea Island (Italy), Chemical Geology (2015Geology ( ), doi: 10.1016Geology ( /j.chemgeo.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E DM A N U S C R I P T ACCEPTED MANUSCRIPTThe subsurface evolution of shallow-sea hydrothermal fluids is a function of many factors including fluid-mineral equilibria, phase separation, magmatic inputs, and mineral precipitation, all of which influence discharging fluid chemistry and consequently associated seafloor microbial communities. Shallow-sea vent systems, however, are understudied in this regard. In order to investigate subsurface processes in a shallow-sea hydrothermal vent, and determine how these physical and chemical parameters influence the metabolic potential of the microbial communities, three shallow-sea hydrothermal vents associated with Panarea Island (Italy) were characterized.Vent fluids, pore fluids and gases at the three sites were sampled and analyzed for major and minor elements, redox-sensitive compounds, free gas compositions, and strontium isotopes. The corresponding data were used to 1) describe the subsurface geochemical evolution of the fluids and 2) to evaluate the catabolic potential of 61 inorganic redox reactions for in situ microbial communities. Generally, the vent fluids can be hot (up to 135 °C), acidic (pH 1.9-5.7), and sulfidic (up to 2.5 mM H 2 S). Three distinct types of hydrothermal fluids were identified, each with higher temperatures and lower pH, Mg 2+ and SO 4 2-, relative to seawater. Type 1 was consistently more saline than Type 2, and both were more saline than seawater. Type 3 fluids were similar to or slightly depleted in most major ions relative to seawater. End-member calculations of conservative elements indicate that Type 1 and Type 2 fluids are derived from two different sources, most likely 1) a deeper, higher salinity reservoir and 2) a shallower, lower salinity reservoir, respectively, in a layered hydrothermal system. The deeper reservoir records some of the highest end-member Cl concentrations to date, and developed as a result of recirculation A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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“…Some locations are more studied than others, as for example the shallow-marine hydrothermal systems at the Aeolian and Hellenic Arc in the Mediterranean or shallow CO 2 seeps in southern Italy (Aliani et al, 2004;Dando et al, 2000;Fitzsimons et al, 1997;Kadar et al, 2012;Price et al, 2013a and b;Varnavas and Cronan, 2005). While some studies for the shallow-hydrothermal vents in the Bay of Plenty, New Zealand exist, systems at the Lesser Antilles Arc in the Caribbean or the New-Hebrides Arc in the South Pacific are barely studied so far (Glasby, 1971;Pantin and Wright, 1994;Sarano et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece), Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand)

et al. 2015

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Submarine hydrothermal brine seeps off Milos, Greece. Observations and geochemistry

Cited by 77 publications

References 33 publications

Renewable energy-driven desalination technologies: A comprehensive review on challenges and potential applications of integrated systems

Renewable energy-driven desalination technologies: A comprehensive review on challenges and potential applications of integrated systems

Subsurface hydrothermal processes and the bioenergetics of chemolithoautotrophy at the shallow-sea vents off Panarea Island (Italy)

Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece), Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand)

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