[meteorite-list] Mesosiderite Redux

From: mark ford <markf_at_meteoritecentral.com>
Date: Mon, 19 Feb 2007 17:00:06 -0000
Message-ID: <6CE3EEEFE92F4B4085B0E086B2941B31391219_at_s-southern01.s-southern.com>

Yep, it is certainly as close as it gets, from a photo at least, I was
pretty amazed by NWA 074 first time I saw it, actually, its quite
stunning for 'just an H6'. I think the key giveaway is in the uniformity
of the Iron, in a MESO I would have expected a bit more 'clumpyness' to
the Iron, the slice you showed has a nice uniform interspersion of metal
just like in an H. There also appears to be slight chrondule like
features in the matrix, and from what I remember of NWA 074 the matrix
is a generally a light brown colour (due to the higher iron), which
actually hides the light brown chondrules that are there quite well!

Just my thoughts mind you, worth getting it checked out if you are
unsure.

Best

Mark Ford
 

-----Original Message-----
From: Gary K. Foote [mailto:gary at webbers.com]
Sent: 19 February 2007 16:51
To: mark ford; meteorite-list at meteoritecentral.com
Subject: RE: [meteorite-list] Mesosiderite Redux

Thanks for the specific reference Mark. I've looked at some pics of nwa
074 and concur
with you. They do look like the same material.

Gary

On 19 Feb 2007 at 16:02, mark ford wrote:

> Hi,
>
> My thoughts are that, that is NWA 074, (an H6 chondrite) I have seen a
> largish slice of that before and it is nearly identical! Very large
> amounts of uniform metallic iron just like that, and not many if any
> distinct chondrules (at least visually).
>
> Best,
>
> Mark Ford
>
>
>
> -----Original Message-----
> From: meteorite-list-bounces at meteoritecentral.com
> [mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Gary
> K. Foote
> Sent: 19 February 2007 15:42
> To: meteorite-list at meteoritecentral.com
> Subject: [meteorite-list] Mesosiderite Redux
>
> I want to thank all who offered input on my mystery specimen and
whether
> or not it could
> be a mesosiderite. Some said the pic was too blurry to really see, so
I
> took a good
> clear closeup. Here it is;
>
> http://www.meteorite-dealers.com/images/mesosiderite2.jpg
>
> Exterior shot isn't as clear but shows the general texture of the
> specimen;
>
> http://www.meteorite-dealers.com/images/mesosiderite4.jpg
>
> Don't mean to hammer this question to death but I am still interested
in
> input with these
> clearer shots. For example, are the greyish blobs chondrules or not?
>
> Gary
> http://www.meteorite-dealers.com
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>
>
Received on Mon 19 Feb 2007 12:00:06 PM PST