[meteorite-list] Carancas, Peru Meteorite Could Be 10 Tons

From: mexicodoug <mexicodoug_at_meteoritecentral.com>
Date: Wed, 17 Oct 2007 05:02:11 -0500
Message-ID: <001201c810a4$ca8628d0$4001a8c0_at_MICASA>

"Perhaps a study might be done on the deterioration of a pallaside meteorite
in tropical conditions."

Hi Francis, List,

Nice consolation thought. At 3800 meters altitude in the mountains, they
are lucky if they don't dip below freezing most nights of the year and in
most of the days of the year if they hit 21 C (70 F), that would be a nice
day, too... Tropical latitude sure, though freezing one's derri?re off
isn't usually considered tropical conditions! That could also be severe in
the sense that the temperature swings are great, and that is what weathers
meteorites mostly. Maybe the residues of the bolide are safer insulated
underground in a fresh water heat sink to moderate this... there's a wishful
thought, if the water frosts a lot that expansion/contraction doesn't sound
too good, either.

Speaking of pallasites, I was just curious whether the "impact models" a lot
of people are "adopting" to model this event could be tweeked to predict,
for Esquel's event, that peridots would turn into powder balls.
http://www.meteoriteman.com/images/32_point_peridot_pear_shape.jpg
Huckitta, Fukang and Krasnojarsk, and the nicely oriented Steve Arnold#1,
too.

Sure the energies from total mass and even airbraking are quite different,
but the cross sectional area to mass ratio of a pallasite work the opposite
way a bit, and I get the idea that a collision at 0.2 Km/s 1 ton piece of
metal might stress the Swiss cheese matrix of a pallasite enough to make the
crystals feel worse than a finger slammed shut in a car door according to
these models...
Best wishes,
Doug


----- Original Message -----
From: "Francis Graham" <francisgraham at rocketmail.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Wednesday, October 17, 2007 3:32 AM
Subject: Re: [meteorite-list] Carancas, Peru Meteorite Could Be 10 Tons


>
> --- Michael Farmer <meteoriteguy at yahoo.com> wrote:
>
>> Matteo, they have no plans to recover the meteorite.
>> It sits, today one month and one day under sewage
>> water. What do you think a fragile high-metal
>> meteorite will look like after that?
>
> Whew. At least it wasn't a 4.2 billion year old
> Martian! Perhaps a study might be done on the
> deterioration of a pallaside meteorite in tropical
> conditions. Seriously. It would let us know what can
> be expected to be found how long after falls. It's
> making the best of a deplorable situation, but that's
> a possible use of the buried mass.
>
>> It is surely one of the most corrupt places
>> I have been, sad to say.
>
> I'm sure it was a very bad experience! Please know
> Peru hasn't got the corner market for police
> corruption. Unfortunately, it's abundant! Why, just
> last week our sheriff was found drunk, driving, and
> they had reason to also give him a urine test. The
> story was stifled until today. See
> http://reviewonline.com/news/articles.asp?articleID=10493
> On the subject of impact sites, the lakes of
> hydrocarbons on Titan that have been discovered do not
> appear to be circular impact basins converted to lakes
> as in the case of lakebeds on Mars. Therefore there is
> some sort of tectonic activity there. Otherwise too
> the streams would be very sinuous and the landsape
> would be a peneplain, which it is not.
> If you mix hydrocarbons and water-ice in a slurry
> and melt and refreeze, under the right conditions you
> can get acicular needle shaped crystals of ice that
> grow dendritic patterns.
> They look like little Christmas Trees. Although
> Huygens didn't see any, the conditions may exist for
> their formation, and this is what would pass for
> "foliage" on cold, cryogenic Titan. It should be
> looked for. They would be evidence of recent
> subsurface heating.
>
> Francis Graham
>
>
>
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Received on Wed 17 Oct 2007 06:02:11 AM PDT