[meteorite-list] I have found "life" in my CO3

From: STARSANDSCOPES at aol.com <STARSANDSCOPES_at_meteoritecentral.com>
Date: Sat, 1 Nov 2008 21:06:05 EDT
Message-ID: <d69.3212b728.363e56fd_at_aol.com>

I have some big unclassified NWA that I have nicknamed UBS or Ugly Black
Stuff and it was growing similar looking white thin crystals as well but only in
certain parts (Patches)

I am guessing moisture accelerates it.

Tom

In a message dated 11/1/2008 6:43:10 P.M. Mountain Daylight Time,
axelsson at acc.umu.se writes:
Could it be gypsum?

Oxidation of sulphides -> sulphuric acid, reacts with CAI and silicates
-> CaSO4 = gypsum.

I have had a number of weathered sulphide ore samples which have
developed white patches on the surface after I have washed them. I don't
know if it is gypsum on my specimens but I have always suspected it.

Thanks for sharing!

/G?ran

Marcin Cimala - PolandMET wrote:
> Hello List
>
> Tooday I wanted to make some description for my new meteorites. When I
> opened one of the boxes, something white almost eat me :)
>
> OK now seriously
> Here is my new MC058 CO3.x chondrite. I received it on end of august,
> cut several slices and store it in cardboard box like all other
> meteorites that wait for clasification. Tooday I wanted to make photos
> and I have found large white crystals growing on both sides of two
> slices.
> Wow, something fantastic.
>
> I remember I have similar things on my Ogrueil, but this one is much
> more larger. Anyone know what it is ?
>
> I will leave them in box for next two months and lets wait if this
> will still grown. But now there will maybe be too cold for them.
> Anyway I will try to hold them undamaged even for next year.
>
> Have fun
> http://www.polandmet.com/_mc058.htm
>
> PS.
> I have for sale three large complete specimens of new CV3,
> unclassified but propably paired with one of the lates CV's. TKW =
> 1154g. Attractive low price. Specimens will be classified. For more
> info please email me.
>
> -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
> http://www.Meteoryty.pl marcin(at)meteoryty.pl
> http://www.PolandMET.com marcin(at)meteorite.pl
> http://www.Gao-Guenie.com GSM: +48 (793) kosmos
> --------[ Member of Polish Meteoritical Society ]--------
>
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Received on Sat 01 Nov 2008 09:06:05 PM PDT