The finding, described in this week's issue of the Proceedings of the National Academy of Sciences, is surprising because previous studies indicate that the brine has been isolated from the surface environment -- and external sources of energy -- for at least 2,800 years, according to two of the report's authors, Peter Doran and Fabien Kenig, both professors of earth and environmental sciences at the University of Illinois at Chicago.
"This provides us with new boundary conditions on the limits for life," said Doran. "The low temperature or high salinity on their own are limiting, but combined with an absence of solar energy or any new inputs from the atmosphere, they make this a very tough place to make a living."
The researchers drilled out cores of ice, using sanitary procedures and equipment. They collected samples of brine within the ice and assessed its chemical qualities and potential for sustaining life.
They found that the brine is oxygen-free, slightly acidic, and contains high levels of organic carbon, molecular hydrogen, and both oxidized and reduced compounds. The findings were unexpected because of the extremely salty, dark, cold, isolated ecosystem within the ice.
"Geochemical analyses suggest that chemical reactions between the brine and the underlying sediment generate nitrous oxide and molecular hydrogen," said Kenig. "The hydrogen may provide some of the energy needed to support microbes.”
"We'd like to go back and find if there is a proper body of brine without ice down there," said Doran. "We'd also like to get some sediment cores from below that to better establish the history of the lake. In the meantime, we are using radar and other geophysical techniques to probe what lies beneath."
The research was conducted with Alison Murray and four of her colleagues at the Desert Research Institute and 10 other scientists at other institutions.Funding was provided by the National Science Foundation and NASA.
- UIC -
NOTE: Please refer to the institution as the University of Illinois at Chicago on first reference and UIC on second reference. "University of Illinois" and "U. of I." are often assumed to refer to our sister campus in Urbana-Champaign.
Anne Brooks Ranallo | Newswise Science News
Cancer: Molecularly shutting down cancer cachexia
30.08.2016 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt
Bringing artificial enzymes closer to nature
30.08.2016 | Universität Basel
Scientists and engineers striving to create the next machine-age marvel--whether it be a more aerodynamic rocket, a faster race car, or a higher-efficiency jet...
Waveguides are widely used for filtering, confining, guiding, coupling or splitting beams of visible light. However, creating waveguides that could do the same for X-rays has posed tremendous challenges in fabrication, so they are still only in an early stage of development.
In the latest issue of Acta Crystallographica Section A: Foundations and Advances , Sarah Hoffmann-Urlaub and Tim Salditt report the fabrication and testing of...
Electrochemists at TU Graz have managed to use monocrystalline semiconductor silicon as an active storage electrode in lithium batteries. This enables an integrated power supply to be made for microchips with a rechargeable battery.
Small electrical gadgets, such as mobile phones, tablets or notebooks, are indispensable accompaniments of everyday life. Integrated circuits in the interiors...
Recent findings indicating the possible discovery of a previously unknown subatomic particle may be evidence of a fifth fundamental force of nature, according...
A nanocrystalline material that rapidly makes white light out of blue light has been developed by KAUST researchers.
25.08.2016 | Event News
24.08.2016 | Event News
12.08.2016 | Event News
30.08.2016 | Power and Electrical Engineering
30.08.2016 | Life Sciences
30.08.2016 | Life Sciences