[meteorite-list] Dronino is an (ungrouped) ataxite

From: Martin Altmann <Altmann_at_meteoritecentral.com>
Date: Sun Aug 8 20:25:43 2004
Message-ID: <004401c47da7$ff4f1600$6bd9e4d9_at_9y6y40j>

Hi list and Bernd,

the camacite needles or spindles in Taza are very sharp defined and come out
very contrastful after etching. If there are a lot of spindles, they are
often so oriented, that they indeed are imitating a kind of a
"Widmannst?ttern pattern", but not very similar to Dronino.

IVA - that's a good point!!
Take a look again on that slice on ebay. One can clearly see, that it's
composed of three large crystals, wherein the orientation of the "pattern"
shows different orientation - almost the complete left half, then upper part
to the right and bottom right -
seperated well visible by the dark clefts.

Immediately when I saw this slice, Gibeon came in my mind, where also such
composed slices can be found.
(Take f.e. a look in your Buehler, page 120).

Dronino is a real uncommon iron!!

Martin,

(also from Southern Germany with a perfect sky for catching perseids. Hope
it will last until the maximum)

----- Original Message -----
From: <bernd.pauli_at_paulinet.de>
To: <Meteorite-list_at_meteoritecentral.com>
Sent: Sunday, August 08, 2004 11:45 PM
Subject: [meteorite-list] Dronino is an (ungrouped) ataxite


> Marcin wrote:
>
> > Pattern is strange. Only idea I just have then was, that this looks
strange
> > like Taza. Of course this is not the same, but this looks the same
strange
> > like Taza pattern, I not know any other similar pattern like from
Dronino.
>
> Hi List,
>
> The Meteoritical Bulletin, No. 88 can shed some light on this Taza-like
structure.
> What you are looking at is probably taenite present as elongated
precipitates
> with sulfide inclusions rounded and elongated along the banding.
>
> But one thing is for sure: it is a very exotic iron meteorite because, on
the one
> hand, it is closely related to IVA irons, whereas, on the other, its low
Au and Ga
> contents clearly distinguish the Dronino element pattern from that of any
known
> iron meteorite group.
>
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Received on Sun 08 Aug 2004 08:29:53 PM PDT