[meteorite-list] Newcomers and the Meteorite world

From: Mark Ford <mark.ford_at_meteoritecentral.com>
Date: Tue, 17 Aug 2010 10:32:06 +0100
Message-ID: <29A9DB45B84970458190D7D39BD42C49B0F0AD_at_gamma.ssl.atw>

And ... a glass of water is interesting when put next to a powerful
magnet, the surface of the water bends as the magnet is brought near it-
It's quite spooky, and even works with a hard drive magnet.


Trouble with looking for magnetic moment alignment in planetary samples
is by the time a slice has been knocked about on a cutting wheel etc, it
has lost much of it's information. I have found that iron meteorites
magnetize very easily even if you tap them sharply a few times, (just
by the earth's magnetic field).

Even sending something through the post, exposes it to all sorts of
fields and mechanical action.

(Plus nearly everyone slaps a rare earth magnet on a rock when they find
it, it's one of the 'is this a meteorite?' tests).


My guess is to get proper magnetic field information you would need a
freshly fallen piece that has been carefully handled and prepared in
such a way as to minimise the disturbance to 'the force'..


Mark

        

-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Adam
Hupe
Sent: 17 August 2010 03:45
To: Adam
Subject: Re: [meteorite-list] Newcomers and the Meteorite world

Hi Mike in CO,

Magnetic susceptibility is a difficult question to answer. A CEREGE
(CNRS),
Geophysics and Planetologyscientist from France flew out here to
Laughlin, NV,
U.S.A. to conduct magnetic susceptibility studies on several of our
planetary
pieces including NWA 5000. He spent hours plotting hundred of points on
NWA
5000 to create a susceptibility map. All I can tell you is that numbers
his
instruments measured were different for each and every point on the
rock. I
guess we will have to wait for the results and magnetic map to be
published.

If you are asking how attracted it is to a magnet, then my answer is as
follows:
NWA 5000 contains more metal than any rock from the Moon discovered, yet
a
magnet will barley stick to it unless you are in direct contact with a
piece of
elemental metal. I have magnets so powerful that the small amount of
iron in
breakfast cereal is enough to make the pieces of cereal stick to them,
same for
dry dog food. For the most part, planetary meteorites are not all that
attracted to standard magnets.


I recommend liberating a piece of a suspected planetary meteorite and
then
testing it with a magnet therefore preserving the rest of the mass for
future
study. A magnet will orient some of the dipoles into a new North South
direction making some future studies impossible.


Best Regards,

Adam




----- Original Message ----
From: Michael Murray <mmurray at montrose.net>
To: Adam Hupe <raremeteorites at yahoo.com>
Cc: Adam <meteorite-list at meteoritecentral.com>
Sent: Mon, August 16, 2010 2:02:36 PM
Subject: Re: [meteorite-list] Newcomers and the Meteorite world

This is probably the 'dumb question of the year' but, is there any
magnetic
susceptibility detectable on NWA 5000 or, for that matter any of your
planetary
pieces? See, told you it was going to be a dumb question.

Mike in CO

On Aug 16, 2010, at 11:43 AM, Adam Hupe wrote:

> Thank you, Greg,
>
> It is both a desert patina and fusion crust. The gray area is where
the fusion
> crust was etched very thin by the prevailing winds and sand over the
1,000
year
> period it spent in Western Sahara. You can still observe contraction
cracks
in
> the gray areas where the crust is so thin that you can see the matrix
through
> it. Most collectors do not realize that Lunar meteorites, for the
most part,
> have brown fusion crusts. A few Mare pieces have smooth black fusion
crusts
>and
> a few Highlands have translucent green fusion crusts. This is one of
many
clues
> that we have a prospective Lunaite in front of us. You will never see
a
>wrinkly
> Eucrite-like black fusion crust on a lunar meteorite.
>
> Best Regards,
>
> Adam
>
>
>
>
> ----- Original Message ----
> From: Thunder Stone <stanleygregr at hotmail.com>
> To: Adam Hupe <raremeteorites at yahoo.com>;
meteorite-list at meteoritecentral.com
> Sent: Mon, August 16, 2010 10:27:33 AM
> Subject: RE: [meteorite-list] Newcomers and the Meteorite world
>
>
> Adam/Greg:
>
> Very impressive.
> Is that a fusion crust on NWA 5000 or desert varnish?
>
> Greg S.
>
> ----------------------------------------
>> Date: Sun, 15 Aug 2010 15:31:50 -0700
>> From: raremeteorites at yahoo.com
>> To: meteorite-list at meteoritecentral.com
>> Subject: Re: [meteorite-list] Newcomers and the Meteorite world
>>
>> The question was presented. How many dealers have a personal
collection?
>>
>> My brother Greg and I started out as collectors and continue to this
day. I
>> believe we have more planetary main masses than anybody in the world.
>>
>> Here is an image of part of the Hupe Planetary Collection.
>>
>> http://themeteoritesite.com/HupeCollectionMainMasses.jpg
>>
>> We have a few more planetary main masses that are not included in
this image,
>> either because they were out on loan or too small.
>>
>> Enjoy and Best Regards,
>>
>> Adam
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Received on Tue 17 Aug 2010 05:32:06 AM PDT