Iron meteorites could signal Mars waterJune 5th, 2009 - 1:25 pm ICT by ANI
London, June 5 (ANI): The rover Opportunity has found six new iron meteorites on Mars, which may reveal how much water they have come into contact with since they landed on the planet millions or billions of years ago.
The rovers Spirit and Opportunity have previously found three iron meteorites, whose shiny, metallic appearance makes them stand out against the dusty Martian surface.
Now, according to a report in New Scientist, Opportunity has turned up six other candidates on a Martian plain called Meridiani Planum, all of which appear to be related to each other.
Instruments on the rover, including its Mossbauer spectrometer, show the rocks are stony, but also contain iron-bearing minerals present in meteorites found on Earth, such as kamacite and troilite.
Because they contain iron, the six new rocks may reveal how much water they have come into contact with since they landed on the planet millions or billions of years ago.
“Imagine finding an old, rusty car in the desert. That is going to tell you something about the exposure to water there,” said James Ashley of Arizona State University in Tempe.
So far, no major signs of rust have been found, but even slight amounts of rust would hint at the alteration by water - in liquid form, and perhaps even in the form of water vapour or ice.
“The rocks are hypersensitive indicators of water exposure, and so may help us address some of Mars’s more subtle climate behaviour in recent epochs,” said Ashley.
“I’ve been very excited about the prospects of finding meteorites at the Opportunity landing site because it is the perfect setting for it - an ancient surface with very few Mars rocks,” he added. “In this sense, it is similar to Antarctic meteorite fields where few Earth rocks are to be found,” he further added.
The rocks may be so-called “impact breccias” - a mixture of both the impactor that created Victoria Crater and the Martian crust that it hit.
“If this is true, then they may have simply weathered out of the blanket of ejected material surrounding the crater and are now resting on the surface,” said Ashley. (ANI)
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- Martian meteorite sheds light on Red Planet's environmental history - Aug 11, 2009
- Curiosity sends first 3D images from Mars - Aug 08, 2012
- Martian meteorites suggest collision with Red planet caused water flow - Feb 03, 2011
- NASA rover reaches rim of the big Martian crater ap - Aug 11, 2011
- Scientists get an "Opportunity" to see interior of Mars - Jan 22, 2010
- NASA Rover finds clue to Mars past - Jun 07, 2010
- US rover to scout for Mars' habitability - Nov 27, 2011
- NASA rover lands on Mars to discover if there was life (Lead) - Aug 06, 2012
- Hot springs on Mars may have nourished life - Nov 04, 2011
- Where to hunt for iron on Mars - Feb 25, 2010
- NASA's Odyssey spacecraft sets exploration record on Mars - Dec 16, 2010
- Mars was windy, wet and wild in ancient times - May 22, 2009
- Nuclear-powered US rover launched to probe Mars' habitability - Nov 26, 2011
- Curiosity rover to test wheels, fire rock-shooting laser - Aug 18, 2012
Tags: arizona state university, earth rocks, epochs, finding meteorites, impact breccias, impactor, iron meteorites, james ashley, mars rocks, mars water, martian crust, martian surface, meridiani planum, metallic appearance, mossbauer spectrometer, new rocks, new scientist, rusty car, water exposure, water vapour