[meteorite-list] Terminological question: SMB vs. IMB

From: Greg Hupe <gmhupe_at_meteoritecentral.com>
Date: Fri Sep 2 08:36:18 2005
Message-ID: <06f101c5afba$e6d713c0$73105c18_at_Gregor>

Hello Martin and List,

First I would like to correct statement in your email to the list:
"On the occasion of an ebay auction, namely NWA 2704 "SMB H4".

NWA 2704 is a nice L3.8, S2, W2, not an H4. I believe the meteorite you
meant to refer to was NWA 2706 which is a beautiful shocked and melted H4.

Here are a couple picture links of NWA 2706 showing the characteristics of
this beauty:

Click here to view 48.9 gram complete slice displaying breccia
http://www.lunarrock.com/nwa2706/nwa2706a.jpg
Click here to view 48.9 gram complete slice displaying abundant metal
http://www.lunarrock.com/nwa2706/nwa2706b.jpg

The term "Shock Melt Breccia" is a term used by Dr. Bunch at NAU when he
classified NWA 2706 for me. I am not sure if it is a new term used by the
NomCom or a preferred term by Dr. Bunch, or if there is a difference between
an IMB and a SMB. My guess is they are one in the same. I will talk to him
and ask these questions.

Best regards,

Greg Hupe
The Hupe Collection
naturesvault (eBay)
gmhupe_at_tampabay.rr.com
IMCA 2185

----- Original Message -----
From: "Martin Altmann" <Altmann_at_Meteorite-Martin.de>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Friday, September 02, 2005 8:04 AM
Subject: [meteorite-list] Terminological question: SMB vs. IMB


> Hello list,
>
> On the occasion of an ebay auction,
> namely NWA 2704 "SMB H4",
> I was asked by a collector, what the difference could be between an impact
> melt breccia IMB and a "shock melt breccia - SMB".
> Honestly I don't know the difference, as I never heard this term "SMB"
> before and was thinking, that all shock and melting processes in ordinary
> chondrites were caused by impacts.
>>From the picture of the auction I can't tell much, as the cut surface of
>>the
> specimen is small and it's looking to me not diffrent from an IMB.
> Is SMB now a term of the official nomenclature and what shall I respond to
> the collector?
>
> Many thanks,
> Martin
>
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Received on Fri 02 Sep 2005 08:36:11 AM PDT