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Supervolcano on Mars and MAVEN Update

Thursday, October 3, 2013 19:44

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Mars Crater Could Be a Huge Ancient Volcano

You’ve all heard of Yellowstone National Park, right? It’s in the northwestern part of Wyoming, and features geysers, mud pots and other manifestations of volcanic activity (but without the actual volcanic mountain). Well, scientists have been saying for a while that it could explode someday as a supervolcano because it has done so in the distant past. When that happens, people in several states (including mine) could be affected. So, they keep studying its ground movements, measuring quakes as they come, and keeping notes as the sleeping giant of a volcano dozes.

New research suggests the Eden Patera basin on Mars could have been formed by an explosive volcanic eruption, not the impact of a large object.
Seen above, for the basin and surrounding area, higher elevations (reds and yellows) and lower elevations (blues and grays) are indicated.
Credit: NASA/JPL/GSFC

It turns out that supervolcanoes aren’t limited to Earth. Mars may have one as well. Planetary scientists studying a region on the Red Planet called Eden Patera. It looks like just about any impact crater we’ve seen, but based on images taken from orbit, the area may well be a very ancient supervolcano. The last time it erupted, it may have blown a huge amount of magma (lava) rich in gases out to the surrounding landscape. As everything cooled, the volcano sank, leaving behind a depression similar to what we see at Yellowstone.

The Martian supervolcano may well have altered the Red Planet’s temperature for a while. It spewed huge amounts of ash and lava, much more than some of the other volcanoes on Mars. This material would have spread up through the atmosphere, and that would have blocked the sunlight and cooled things down.

So, how did planetary scientists happen to find this long-hidden supervolcano on Mars? It lies in a region that is pretty heavily cratered anyway, so people could have thought Eden Patera was just another impact crater. But, it some features that didn’t quite fit the requirements for such an event. It doesn’t have a raised rim as other impact craters do. Also, there’s no evidence of what scientists call “impact ejecta”. That’s literally rock ejected at the point of impact and scattered close by. So, it really didn’t suggest an impact origin for this depression in the Martian surface.

But, volcanism does create similar looking regions all the time. And, as it turns out, there could be more of these “hidden” volcanoes in the same region, suggesting a lot of activity in the distant past. If they get identified as real volcanoes, it could go a long way to explaining the existence of huge lava flows that haven’t yet been linked to any known volcano on Mars.

After a two-day shutdown, processing work will resume on the MAVEN spacecraft, shown here during an illumination test at NASA’s Kennedy Space Center. (Courtesy NASA/Kim Shiflett)

Update on MAVEN

In my last post I pointed out that the MAVEN mission was being shut down and processing halted due to the budget impasse instigated by the Republican-led House of Representatives in Washington, D.C. The mission was facing missing its launch window, thus wasting millions of dollars of valuable time and hardware if the team had to wait until 2016 to launch. Today, the MAVEN mission processors were allowed to go back to work to finish preps for MAVEN’s November launch. As it turns out, the mission is deemed “essential” since it will be part of the communication network from Mars to Earth, and any delay might leave us without a way to “talk” to other missions at Mars should one of the links that are already there suffer a failure. The resumption of work on the mission to get it ready for launch is a tremendous relief for the scientists and technical staff who have put years of their lives into the mission.

That’s the good news. The bad news is that those processors won’t be paid for their time. So, we should all be somewhat thankful that there ARE people in government service who take their jobs seriously and try to do what’s right.

Hurray for MAVEN and let’s hope it launches well!

Source: http://thespacewriter.com/wp/2013/10/03/supervolcano-on-mars-and-maven-update/

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