Talk:Mars meteorite
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Mars meteorite is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information. |
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[edit] Untitled Comment
An article that discuss a recent research that asserts Mars has always been a cold desert. [1]
[edit] Untitled Comment 2
Is there any source for this paragraph?
"It should be pointed out, however, that the isotope ratios do not actually match Mars ratios especially well, to the extent that Mars ratios are known..."
And this:
"Although common wisdom is that the SNC meteorites are from Mars, the Mars origin theory does have some problems. The isotope ratios are not an especially good match. A widely published graph showing a near-perfect match is alleged to be constructed from examples selected to "prove" the hypothesis and to be a poor representation of the real data. For example, the Ar40/Ar36 ratio for one meteorite (1650) is almost exactly half-way between Earth (300) and Mars (3000). Carbon dioxide, the predominant gas in the current Mars atmosphere, is unaccountably rare in the trapped gases in the SNC meteorites. The SNC meteorites do not show shock artifacts that would be expected in small objects ejected with enough velocity to escape Mars. The majority of SNC meteorites are quite young by geologic standards and seem to imply that volcanic activity was present on Mars only a few hundred million years ago. Cosmic ray traces in the meteorites indicate relatively short stays (3 to 3.5 million years) in space. It is asserted that there are no large young craters on Mars that are candidates as sources for the SNC meteorites."
Searches of the web found nothing close, except a couple of references to recent volcanic activity. The paragraph also includes weasel terms "is alleged to be" and "it is asserted that" with no sources as to who is alleging or asserting. Ken Arromdee 20:20, 13 September 2005 (UTC)
- In the absence of references, I've deleted this material. Ken Arromdee 21:53, 25 January 2006 (UTC)
[edit] ALH84001
In the article ALH84001 is described as a shergottite, but I don't know of anyone in the planetary science community who would classify it that way. McSween and Treiman [1998] says, "this meteorite does not fit into any of the previously established SNC categories." It should probably be its own category.--Will.i.am 21:52, 19 September 2006 (UTC)
[edit] Determination that Meteorite is from Mars
It is not clear to me how this is determined. Could they possibly be from another planet, moon, or other body? Also, has any meteorite from Venus, Mercury, or the moons of Jupiter ever been found? --Eraticus 04:20, 21 April 2007 (UTC)
