Water and life may be present beneath Martian volcano

March 5th, 2009 - 12:44 pm ICT by ANI  

Washington, March 5 (ANI): A team of scientists has used a computer modeling system to reach the surprising conclusion that pockets of ancient water may still be trapped under the Martian volcano Olympus Mons, that has implications for life on the Red Planet.
The computer model was developed by Rice University professors Patrick McGovern and Julia Morgan.
The scientists explained that their finding is more implication than revelation.
“What we were analyzing was the structure of Olympus Mons, why it’’s shaped the way it is,” said McGovern, an adjunct assistant professor of Earth science and staff scientist at the NASA-affiliated Lunar and Planetary Institute. “What we found has implications for life,” he added.
In modeling the formation of Olympus Mons with an algorithm known as particle dynamics simulation, McGovern and Morgan determined that only the presence of ancient clay sediments could account for the volcano’’s asymmetric shape.
The presence of sediment indicates water was or is involved.
Olympus Mons is tall, standing almost 15 miles high, and slopes gently from the foothills to the caldera, a distance of more than 150 miles.
That shallow slope is a clue to what lies beneath, according to the researchers.
They suspect if they were able to stand on the northwest side of Olympus Mons and start digging, they”d eventually find clay sediment deposited there billions of years ago, before the mountain was even a molehill.
The European Space Agency’’s Mars Express spacecraft has in recent years found abundant evidence of clay on Mars.
This supports a previous theory that where Olympus Mons now stands, a layer of sediment once rested that may have been hundreds of meters thick.
Morgan and McGovern show in their computer models that volcanic material was able to spread to Olympus-sized proportions because of the clay’’s friction-reducing effect, a phenomenon also seen at volcanoes in Hawaii.
According to the researchers, what may be trapped underneath is of great interest.
Fluids embedded in an impermeable, pressurized layer of clay sediment would allow the kind of slipping motion that would account for Olympus Mons” spread-out northeast flank - and they may still be there.
Thanks to NASA’’s Phoenix lander, which scratched through the surface to find ice underneath the red dust last year, scientists now know there’’s water on Mars.
So, Morgan and McGovern feel it’’s reasonable to suspect water may be trapped in pores in the sediment underneath the mountain.
“This deep reservoir, warmed by geothermal gradients and magmatic heat and protected from adverse surface conditions, would be a favored environment for the development and maintenance of thermophilic organisms,” they said. (ANI)

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