Can someone familiar with testing Acapulcoites contact me off list please.
I have questions about this stone:
http://i27.photobucket.com/albums/c165/jedisdiamond/uNWA46gec2a.jpg
Thanks,
Greg C.
__
http://www.meteoritecentral.com
Meteorite-lis
FLOSS C. et al. (2002) Acapulcoite complexities: Clues from
trace element distributions (MAPS 37-7, 2002, A047, excerpts):
1. Acapulcoites and lodranites are primitive achondrites from a common parent
body that experienced variable degrees of partial melting and melt migration.
2. NWA 725 exh
Stan and David kindly wrote:
As for NWA 725, here are the details as Stan shared them with me:
Recent O-isotopic analysis of a probable paired stone...by the Open
University resolves the material clearly within the winonaite field.
Hello List,
Does anyone have a NWA 725 thin section and a win
> I'm must be missing something. What could one conclude by comparing thin
> sections of NWA 725 and a known winonaite? I understand that distinguishing
> among acapulcoites, lodranites and winonaites is not a textural exercise nor
> can they be resolved by just their mineral composition.
Hello
Hmm ?!?
Just noticed something contradictory:
"The winonaites are texturally similar to acapulcoites, but the winonaites
contain coarser grains and abundant crosscutting metal-sulfide veins."
Marvin's pic of the Acapulco thin section shows grains that are coarser
than the ones of NWA 1054 but ma
> http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1808.pdf
Matteo, thank you for the link. An interesting detail with regard to NWA 725's
status as a winonaite or an acapulcoite might be this conclusion by the authors
at the end of the paper:
"... the Cr2O3 contents of high-Ca pyroxenes, (1.56 - 1
Hmm-ing again :-)
"The winonaites are texturally similar to acapulcoites, but the winonaites
contain coarser grains and abundant crosscutting metal-sulfide veins."
Could this by a typo because:
Marvin's pic of the Acapulco thin section shows grains that are coarser
than the ones of NWA 1054 ...
--- [EMAIL PROTECTED] ha scritto:
> Unortunately I still don't have a thin section of an
> acapulcoite but the one pictured
> in Marvin Killgore's "Color Atlas of Meteorites in
> Thin Section" on pages 208-211
> (Acapulco) surely looks different than the winonaite
> on pages 232-235 (NWA 1054).
hello
this is the official study and analysis
http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1808.pdf
Matteo
--- [EMAIL PROTECTED] ha scritto:
> Hmm ?!?
>
> Just noticed something contradictory:
>
> "The winonaites are texturally similar to
> acapulcoites, but the winonaites
> contain coarse
- John
John Kashuba
Ontario, California
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Thursday, February 16, 2006 11:02 AM
Subject: [meteorite-list] Acapulcoites and NWA 725
I'm must be missing something. What could one conclude by comparing thin
sections of NWA 725
aren't
> very subtle. Nor are they
> orderly. Please see these examples. The fields of
> view are all the same,
> three and a half millimeters from left to right.
>
>
>
>
http://www.johnkashuba.com/Ach%20Acapulcoites_and_Winonaites.html
>
>
>
> Regards,
aren't
> very subtle. Nor are they
> orderly. Please see these examples. The fields of
> view are all the same,
> three and a half millimeters from left to right.
>
>
>
>
http://www.johnkashuba.com/Ach%20Acapulcoites_and_Winonaites.html
>
>
>
> Regards,
Ayyy!!!
No, such strings are as old as the mountains - it's always the same tkw-,
number-salad-, pairing issue.
The old crux of all NWA-material, of which really each collector should be
aware.
And if a collector or a seller can't cope with that situation, he should
switch to the names or
The supposedly paired NWA 2656 - 2699 - 2871
have alone 7.5kg - 1.294 - 3.47 together 12kg = more than half of all
Acap-material on Earth.
to clear things up - my 3.47kg is part of the 7.5kg written about in 2656
NWA 725 has 3.8kg
Dho 125 7.5kg
Acapulco 1.9kg
NWA 725 is likely to actu
> NWA 725 is likely to actually a winonaite. I had
> Open University do o
> isotopse on some paired material and it plots right
> on top of nwa 1463
>
NWA 725 its similar to my NWA 1058 and my NWA 1058 its
classificated primitive achondrite like winonaite, but
others put this to a acapulcoite, p
Hello Martin,
As for NWA 725, here are the details as Stan shared them with me:
Recent O-isotopic analysis of a probable paired stone (number pending)
by the Open University resolves the material clearly within the
winonaite field:
"In particular, the D17O value of -0.431 is in reasonable agre
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