[meteorite-list] NWA 1685 or Dean's BL

From: tett <tett_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:14 2004
Message-ID: <000601c424b8$306fc430$6400a8c0_at_Tettenborn>

Bernd,

Us BL owners and I am sure much of the list would love to see some images.
Please share some. We know you take wonderful pics through your scope.

Cheers,

Mike Tettenborn

----- Original Message -----
From: <bernd.pauli_at_paulinet.de>
To: <Meteorite-list_at_meteoritecentral.com>
Sent: Saturday, April 17, 2004 3:27 PM
Subject: [meteorite-list] NWA 1685 or Dean's BL


> Hello Dean, BL-owners and List,
>
> Today I took some digital pictures of several of my thin sections
> under crossed polarized light. Among these, my NWA 1685 thin
> section which I purchased from Dean a few days ago and I am
> glad I did. He had another one on EBay but I've just bought it with
> "Buy It Now" :-)
>
> The BL's have already been the subject of much debate and whatever
> they will finally be classified as, they are beautiful, they are
extraordinary.
> There are now two gorgeous, cut specimens in my collection: 131 grams
> and 251.3 grams with fantastic fusion crust and regmaglypts - plus these
> two thin sections.
>
> Here is what I found in the BL thin section thaI I already own:
>
> Both in hand specimen as in thin section there are areas that are
absolutely
> featureless, devoid of any chondrules or other inclusions, and look almost
> achondritic.
>
> The view under crossed polars is breathtaking: While there are chondrules
> and mineral components of various sizes in a fine-grained, almost opaque
> groundmass, the featureless clast in my TS shows an incredible,
equigranular
> structure without any fine-grained, interstitial groundmass ... as if it
had been
> "blown" or "swept" away.
>
> Never before have I seen this in any other thin section that I have or
that I
> have seen pictured in the literature. Imagine hundreds and hundreds of
> colorful little pearls seen from a distance.
>
> Best wishes,
>
> Bernd
>
>
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Received on Sat 17 Apr 2004 04:11:37 PM PDT