[meteorite-list] Meteorites on Mars Paper?

From: Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Thu Jan 20 18:02:46 2005
Message-ID: <037201c4ff44$14501c70$6401a8c0_at_Dell>

WoW!!! I just thought!!!!!
What if they find an earth rock on Mars that was propelled say by
Cickalub's(sorry for spelling) impact or major paleocene impact!! WOW!!
Jerry
----- Original Message -----
From: "Ron Baalke" <baalke_at_zagami.jpl.nasa.gov>
To: "Meteorite Mailing List" <meteorite-list_at_meteoritecentral.com>
Sent: Thursday, January 20, 2005 5:38 PM
Subject: Re: [meteorite-list] Meteorites on Mars Paper?


>>
>>
>> In this article, there is a reference to a paper by Alex Brevan in 2000
>> about
>> predicting meteorites on Mars. Does anyone know what paper this is?
>>
>
> Pierre Rochette has found the paper:
>
> Meteorite Accumulations on Mars
> Authors: Bland, P. A.; Smith, T. B.
> Affiliation: AA(Department of Mineralogy, Natural History Museum,
> London, United Kingdom), AB(Department of Physics, The Open
> University, Milton Keynes, United Kingdom)
> Journal: Icarus, Volume 144, Issue Icarus, pp. 21-26. (Icarus Homepage)
> Publication Date: 03/2000
>
> Here's the abstract:
>
> We have modeled single-body meteoroid atmospheric entry speeds at Mars
> and the effect of drag and ablation, and identify a narrow range of
> small masses (10-50 g) that should impact Mars at survivable speeds.
> The rate of oxidative weathering is much lower than that on Earth, so
> this small flux of meteorites could give rise to significant
> accumulations: ca. 5x10^2 to 5x10^5 meteorites greater than 10 g in
> mass per square kilometer. Given that extremely large numbers of
> meteorites may be present on Mars, future sample-return missions
> should consider the real possibility that they may recover
> meteoritic material. Due to the low weathering rate, meteorites
> may survive on the surface of Mars for more than 10^9 years,
> preserving a record of the temporal variability of the meteoroid
> flux and the compositional evolution of the meteoroid complex.
> Intact carbonaceous chondrites may also preserve organic compounds
> from degradation by ultraviolet radiation. Terrestrial meteorites
> may be present, but would probably be sterile.
>
> Ron Baalke
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Received on Thu 20 Jan 2005 06:02:12 PM PST