[meteorite-list] Capot Rey...photos please of the H5

From: M come Meteorite Meteorites <mcomemeteorite2004_at_meteoritecentral.com>
Date: Sat Sep 24 01:32:15 2005
Message-ID: <20050924053212.45858.qmail_at_web26202.mail.ukl.yahoo.com>

I have control my Capot Rey IMB under microscope, and
paired with other IMB I have in my collection. Capot
Rey is not IMB, its only a breccia, but not melted. In
all my IMB is not present metal in the melted zones,
type my NWA 1701, or Rammya, or Dhofar 010...in the
Capot Rey its present complete metal in the " black
veins " but not melted. In conclusion, for me, Capot
Rey IMB slices is not Impact Melt but a normaly H5
Breccia.

Matteo


--- Jeff Kuyken <info_at_meteorites.com.au> ha scritto:

> Hi Martin,
>
> I can certainly see what you are saying but that was
> not really my point. My
> point is that it is not up to us to 'make-up'
> classifications without the
> proper science being done. Admittedly, I've only
> seen a few photos of the
> Caopt Rey pieces and in my opinion the one that was
> just posted by Cartsen
> is certainly a highly shocked piece but it's not an
> IMB. I think if you
> compare them to meteorites like Cat Mountain or Mike
> Farmer's NWA 2085 you
> will see what I mean. That said, it is certainly a
> gorgeous meteorite which
> I wouldn't mind having a piece myself! ;-)
>
> Cheers,
>
> Jeff
>
>
> ----- Original Message -----
> From: Martin Altmann
> To: Jeff Kuyken ;
> meteorite-list_at_meteoritecentral.com
> Sent: Friday, September 23, 2005 8:18 PM
> Subject: Re: [meteorite-list] Capot Rey...photos
> please of the H5
>
>
> Hi Jeff,
>
> as far as I understand the term "IMB" does not name
> a completely and
> uniformly molten rock.
> Else, I would have have problems to understand the
> "B", if there aren't any
> fragments of the precessor material to be found in
> the melt (and I think, we
> easily will sled into the PAC corner).
> Different classification of the same find as IMB or
> H5 f.i. are easily
> explainable. Take for instance Dho 010, there you
> have broad streams of melt
> flowing around chondritic fragments in different
> stages of melting, some
> even unaltered, therefore one can determinate the
> type (have to look Dho 010
> if I remember right is H6).
> And furthermore take our good old Gao! There you
> have stones, which are
> simply more or less normal chondrites, other stones
> show large melt pockets
> and again others are more or less totally molten and
> have to be regarded, if
> one doesn't know about the other average Gao
> specimens, with no doubt as
> IMBs. Take a look on David Weir's page, there you
> have such an example.
> Thus with Gao we have the whole spectra - H5, H5
> with melt, IMB.
> It's always the same, it depends what for a stone
> the classificators get,
> what for sections they do have.
> Remember the NWA 1109, they caught parts with
> slightly below 10% Dio, thus
> it's an EUC-P, another cut, another stone from the
> same find with >10%,
> voila they had to call it a How.
> Take also good old Zag. There exist pieces with only
> a single lithology, if
> those would have been handed in for typing, Zag
> wouldn't have bin classified
> as regolith breccia. Take the NWA-Rumurutis, some
> are nice brecciae,
> result - obviously paired ones (lalalaa I know, I'm
> not a scientist, but if
> it's looking the same in every detail and the stuff
> is so rare) got
> different classifications. Some R4s are paired with
> R3-6...
> Ooops, all I'm writing here, is about the optical,
> physical appearance of
> the stones, not chemically.
>
> Now, I would guess, with Capot Rey, they took either
> a piece without melt
> (if exists) or determinated the type from a not
> molten fragment in the melt.
>
> But look at the phantastic pieces of Carsten, those
> dark fat rivers of melt
> around the grey round jigsaw pieces. Hence if Dho
> 010, who looks the same,
> but is only much more weathered, was called a IMB, I
> dare to say in my
> Lieschen-Mueller-opinion
> (Lieschen Mueller is the German sister of John Doe),
> Capot Rey is an IMB
> too.
>
> Of course again we would need a concretion of terms
> from a qualified mouth.
> With type-7 vs. PAC vs. IMB we learned, that it has
> to do with the isotopes
> and in general nobody is sure about the criteria,
> now we have IMB vs. MR (melt rock) vs H or L with
> IMB vs H or L with visible
> huge parts of melt, but not assigned,
> or we have to resign ourself to being more types of
> rock out there in space
> as we have terms for them :-)
>
> Buckleboo!
> Martin
>
>
> ----- Original Message -----
> From: "Jeff Kuyken" <info_at_meteorites.com.au>
> To: "drtanuki" <drtanuki_at_yahoo.com>;
> <meteorite-list_at_meteoritecentral.com>
> Sent: Friday, September 23, 2005 10:57 AM
> Subject: Re: [meteorite-list] Capot Rey...photos
> please of the H5
>
>
> > I would be a bit cautious about calling something
> an IMB unless it has
> been
> > formally classified as such. My understanding is
> that this meteorite was
> > classified as H5 but after further cutting later
> was found to be highly
> > shocked. Let's not forget that IMB is basically a
> scientific term
> referring
> > to the fact that the pressure reached about 75-90
> GPa and is rated as S6+.
> > It's original shock rating was only S2. A new
> piece should probably be
> > submitted for re-classification so a proper
> determination can be made.
> >
> > Cheers,
> >
> > Jeff
> >
> > ----- Original Message -----
> > From: drtanuki
> > To: meteorite-list_at_meteoritecentral.com
> > Sent: Friday, September 23, 2005 9:47 AM
> > Subject: [meteorite-list] Capot Rey...photos
> please of the H5
> >
> >
> > Dear List,
> > Does anyone have more information about Capot
> Rey?
> > It is listed as an H5 in the MetBul and has no
> mention
> > of it being an IMB. I would appreciate photos if
> > someone has them of their samples that were not
> sold
> > as an IMB. Thank you in advance.
> > Sincerely, Dirk Ross...Tokyo
> >
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Received on Sat 24 Sep 2005 01:32:12 AM PDT