Moroccan desert meteorite delivers Martian secrets

Oct 11, 2012
UAlberta researcher Chris Herd shows off a piece of the Tissint meteorite that landed in Morocco last year. Credit: John Ulan

(Phys.org)—A meteorite that landed in the Moroccan desert 14 months ago is providing more information about Mars, the planet where it originated. University of Alberta researcher Chris Herd helped in the study of the Tissint meteorite, in which traces of Mars' unique atmosphere are trapped.

"Our team matched traces of gases found inside the Tissint meteorite with samples of Mars' atmosphere collected in 1976 by Viking, NASA's mission," said Herd.

Herd explained that 600 million years ago the meteorite started out as a fairly typical on the surface of Mars when it was launched off the planet by the impact of an asteroid.

"At the instant of that impact with Mars, a shock wave shot through the rock," said Herd. "Cracks and fissures within the rock were sealed instantly by the heat, trapping components of Mars' atmosphere inside, and forming black, glassy spots."

The team estimates that for a period between 700,000 and one million years the rock floated through outer space until July, 2011 when it streaked through Earth's atmosphere landing in Morocco.

This is only the fifth time a landing was witnessed. Herd says the fact that it was picked up just a few months after landing and was not subjected to weathering or contamination on this planet is the key reason why this meteorite is so important.

The Martian weathering involved water, which means water was present on the surface of Mars within the past few hundred million years. But Herd says this meteorite sample does not carry any evidence the water supported any life forms.

"Because the was subject to such intense heat any water borne forms that may have existed deep within cracks of the rock would have been destroyed," said Herd.

Curiosity, NASA's current Mars Rover mission is moving around the Red Planet searching for more information on the history of Mars.

The team's study makes a return mission to Mars that will bring rocks back to Earth all the more crucial, "Martian rocks delivered to Earth by a space craft would provide the best opportunity to see if life was ever clinging to the surface of Mars."

Explore further: Computer simulation suggests early Earth bombarded by asteroids and comets

More information: The research paper published online Oct. 11 in the journal Science.

"Tissint Martian Meteorite: A Fresh Look at the Interior, Surface and Atmosphere of Mars," by H. Chennaoui Aoudjehane, Science, 2012.

Related Stories

Scientists confirm rocks fell from Mars (Update)

Jan 17, 2012

They came from Mars, not in peace, but in pieces. Scientists are confirming that 15 pounds of rock collected recently in Morocco fell to Earth from Mars during a meteorite shower last July.

Rover Confirms Meteorite on Mars

Aug 06, 2009

(PhysOrg.com) -- Composition measurements by NASA's Mars Exploration Rover Opportunity confirm that this rock on the Martian surface is an iron-nickel meteorite.

Opportunity finds possible meteorite

Sep 22, 2010

(PhysOrg.com) -- Images that NASA's Mars Exploration Rover Opportunity took at the end of an 81-meter (266-foot) drive on Sept. 16 reveal a dark rock about 31 meters (102 feet) away. The rover's science team ...

Recommended for you

Exploring Mars in low Earth orbit

2 hours ago

In their quest to understand life's potential beyond Earth, astrobiologists study how organisms might survive in numerous environments, from the surface of Mars to the ice-covered oceans of Jupiter's moon, ...

Lifetime of gravity measurements heralds new beginning

4 hours ago

Although ESA's GOCE satellite is no more, all of the measurements it gathered during its life skirting the fringes our atmosphere, including the very last as it drifted slowly back to Earth, have been drawn ...

NASA's IceCube no longer on ice

8 hours ago

NASA's Science Mission Directorate (SMD) has chosen a team at NASA's Goddard Space Flight Center in Greenbelt, Maryland, to build its first Earth science-related CubeSat mission.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

cyberCMDR
not rated yet Oct 12, 2012
Hmm. I wonder if it is similar the the Black Stone at Mecca.