AW: [meteorite-list] mainmass

From: Bernhard Rems <rendelius_at_meteoritecentral.com>
Date: Wed Nov 17 16:12:59 2004
Message-ID: <002201c4ccea$2eb03550$bc4a2fd5_at_rendhome>

I second that. I think that's how the term main mass is best described.

-----Urspr?ngliche Nachricht-----
Von: meteorite-list-bounces_at_meteoritecentral.com
[mailto:meteorite-list-bounces_at_meteoritecentral.com] Im Auftrag von dean
bessey
Gesendet: Mittwoch, 17. November 2004 21:46
An: meteorite-list_at_meteoritecentral.com
Betreff: Re: [meteorite-list] mainmass

We have argued for years about this and often with
agendas to push and you can argue forever without a
concensus that pleases everybody.
The main mass is the largest remaining piece. Are you
saying that if a rock is cut so that no piece is
larger than 50% of the original weight that there is
no longer a main mass in existance? Also what about
when the largest piece is less than 50% like in large
falls like campo del ceilo or
example. The 50% rule is pretty much dumb.
The situation with NWAs, Dhofars, DAGs ect adds a
little problem because we all know that many are
paired.
But I have a solution to the desert problem. When a
meteorite is registered with the met society it has a
defined weight. A single stone might weigh 456 grams
and if say NWA10875 is officially 456 grams there can
be no more NWA10875 other than this 456 grams. A
paired stone might later be called NWA11225 that
weighs 367 grams. There can be a largest piece of both
of those stones. There are now two main masses of the
stones even though everybody knows that they are from
the same fall. But there are two valid main masses
here. Maybe if somebody dont like that they can coin
the name "DESERT MAIN MASS"
which refers to the main mass of a desert meteorite
that we know likely has pairings. But we all know this
anyway so adding the word "desert" might be a waste of
space.
The main mass of say NWA10875 is the largest piece of
NWA10875 that still exists. I dont see the real
problem with this since we know exactly the weight of
what is known as NWA10875
Cheers
DEAN















--- Michael Farmer <meteoritehunter_at_comcast.net>
wrote:

> Andreas, to me and everyone I know, main mass always
> signifies the largest
> remaining piece of any meteorite.
> Thus if a Dhofar is found in 3 individuals, the
> largest is the main mass,
> but if that piece is cut up, and one of the smaller
> pieces is left, then I
> think that should be called the main mass.
> I know there are no official rules on that though.
> Michael Farmer.
> ----- Original Message -----
> From: "Andreas Gren"
> <andreas.gren_at_gren-webservice.de>
> To: <meteorite-list_at_meteoritecentral.com>
> Sent: Wednesday, November 17, 2004 1:29 PM
> Subject: [meteorite-list] mainmass
>
>
> > Dear List
> > Is there an official definition for mainmasses?
> > A)the mass that is left after classification .
> > ok no problem
> > B)over 50% of one meteorite.
> > What's up with meteorites where several peaces
> were found ,then three
> > stones could be the mainmass but there could be
> one stone that's bigger
> > as
> > each of the three but less than 50% ,so the
> biggest would not necessary be
> > the mainmass
> > C)less than 50% of one meteorite.
> > So the problem in B)would be solved ,but when
> there is only one stone and
> > I
> > have a mainmass with less than 50% it could happen
> this stone broke/ore be
> > cut
> > and suddenly another person have the mainmass
> because each of the
> > fragments
> > are smaller than the slice person x has and person
> x did not know that
> > he/she is suddenly the owner of the mainmass .
> > any help ?
> >
> >
> > ______________________________________________
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> >
>
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> >
>
>
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Received on Wed 17 Nov 2004 04:12:42 PM PST