[meteorite-list] Spade Versus Estacado

From: Adam Hupe <adamhupe_at_meteoritecentral.com>
Date: Thu Apr 22 10:16:37 2004
Message-ID: <006b01c36e5b$7170c100$b4dbe60c_at_attbi.com>

Hi Michael and List,

I was not questioning Matt's integrity at all. Both meteorites were found
in Texas less than 35 miles apart and are very similar in appearance. Since
finely metal-grained H6s with dark matrixes and low shock are rare I feel a
pairing must be considered. In any case both Spade and Estacado are
beautiful stones.

All the best,

Adam


----- Original Message -----
From: "Michael L Blood" <mlblood_at_cox.net>
To: "Adam Hupe" <adamhupe_at_comcast.net>;
<meteorite-list_at_meteoritecentral.com>; <bernd.pauli@paulinet.de>
Sent: Friday, August 29, 2003 11:29 AM
Subject: Re: [meteorite-list] Spade Versus Estacado


> Bernd's observations and opinion are good enough for this cowboy.
> Also, isn't Matt's meteorite a US find? Matt's integrity is beyond
> question in my book.
> Michael
>
>
> on 8/29/03 9:00 AM, Adam Hupe at adamhupe_at_comcast.net wrote:
>
> > Dear List Members,
> >
> > If somebody wants to sell an Estacado specimen and a Spade specimen to
us at
> > the Denver show we would be happy to donate them to a world class
researcher
> > who will also be at the show for comparative purposes. We are in the
> > process of working with several laboratories to sort out NWA pairings
> > (mainly the stony-irons) and have provided several samples to each
facility.
> > We have found that shock and weathering levels amongst other things are
> > variable even from the same strewn field in many cases.
> >
> > The evenly disbursed, fine-grained metal gives Estacado the appearance
that
> > there is more metal than there actually is. I have only seen this
texture in
> > one other H chondrite and that is NWA 1792 before looking at Spade. Add
the
> > darkened matrix and you have a pretty stunning looking meteorite. After
> > cutting thousands of NWA meteorites I have only seen this texture once,
in
> > my opinion making it rare. I think all suspected pairings should be
> > investigated to keep the books clean, so to speak.
> >
> > All the best,
> >
> > Adam Hupe
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: <bernd.pauli_at_paulinet.de>
> > To: <Meteorite-list_at_meteoritecentral.com>
> > Sent: Friday, August 29, 2003 8:38 AM
> > Subject: [meteorite-list] Spade Versus Estacado
> >
> >
> >> Hello once again,
> >>
> >> Another possible inconsistency:
> >>
> >> My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2)
> >> and I found at least 7 relict POP chondrules and 1 relict, barred
> >> chondrule.
> >>
> >> This would also be in clear contrast to A.E. Rubin's statement:
> >>
> >> "The impact melt origin of [Spade] is indicated by the low
> >> modal abundances of relict chondrules (1.8 vol.%) ..."
> >>
> >> Bernd
> >>
> >>
> >> ______________________________________________
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> >
> >
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Received on Fri 29 Aug 2003 02:29:11 PM PDT