[meteorite-list] H4? the terdaght meteorite fall

From: Jeff Kuyken <info_at_meteoritecentral.com>
Date: Thu, 29 Jan 2009 13:10:45 +1100
Message-ID: <C274229746E74206A3DA8CBF1EE3B618_at_JeffPC>

Hi Elton & all,

In my experience... you just never know what something might come back as.
Just think of the huge NWA EL3 find and all the classifications that went
through. There is hardly a chondrule to be seen in that meteorite... yet
it's a type-3!

There are a couple of others that I've had a 'double take' on and thought...
is that right?

This one for example was classified as an H6!!!!!!!! I have several pieces
of this meteorite and some have even more chondrules.

http://www.meteorites.com.au/collection/NWA%201287%20H6%205.0g.jpg

And then poor old NWA 2622... didn't quite make the type-3 club yet it's
even nicer than some of my other type-3's.

http://www.meteorites.com.au/favourite/january2005.html

But the meteoriticists know their stuff and everything is classified the way
it is for a reason!

Cheers,

Jeff


----- Original Message -----
From: "Mr EMan" <mstreman53 at yahoo.com>
To: <meteorite-list at meteoritecentral.com>; <bldlv1964 at yahoo.com>
Sent: Thursday, January 29, 2009 2:03 AM
Subject: Re: [meteorite-list] H4? the terdaght meteorite fall


Thank You Ben--I don't disagree. Apparently it has already been resold but
my point was how does one "estimate" that the meteorite was an H4 if there
were no chondrules visible? It isn't impossible, I guess, but on the face
value of the statement is hard for me to visualize how an H4 can "look like"
an H6 but be an H4. I was trying to establish the basis for the claim of H4
vs H6.

I realize it is not necessarily the quantity of chondrules over the state of
the chondrules metamorphasis that determines petrology. I know that in all
the H4s in my possession I can easily distinguish chondrules. Apparently
there are enough informed members that there is something legitimate to the
estimate.

Perhaps we've an H4 with a major void of chondrules within a portion of the
matrix and that is very noteworthy if it proves out.

Elton


--- On Wed, 1/28/09, benjamin de la vega <bldlv1964 at yahoo.com> wrote:

> The operative word is "Possible", until it is
> classified. So let's wait it out.
>
> Ben de la Vega
> info/meteorite-list
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Received on Wed 28 Jan 2009 09:10:45 PM PST