[meteorite-list] Brachinites & NWA 4882

From: Greg Hupe <gmhupe_at_meteoritecentral.com>
Date: Mon, 1 Dec 2008 20:18:27 -0500
Message-ID: <EC2FAA90007F4E5FA0E7FC0D30B83F15_at_Gregor>

Hello Dirk and List,

Dirk, since you would like to promote brachinite material, here is a little
insight you may not be aware of:

NWA 4882 Brachinite (unpaired) - I have made private sales several months
PRIOR to Martin's public offering, at much less than their great price per
gram. I know MY customers are very happy with their greatly discounted rate!
I simply do not have time to offer all of the different and new meteorites I
have at one time publicly, AND I am not trying to interfer with their sales,
but since Dirk brought this out in what I perceive in a negative tone, here
is one heck of a Brachinite for serious collections:

Click here to view complete slice of NWA 4882 measuring 130mm wide!

http://www.lunarrock.com/nwa4882/nwa4882slice.jpg



Click here to view complete NWA 4882 stone before cutting:

http://www.lunarrock.com/nwa4882/nwa4882.jpg



Click here to view close-up of polished NWA 4882 matrix:

http://www.lunarrock.com/nwa4882/nwa4882closeup.jpg


Official Classification:
Northwest Africa 4882

Algeria

Find: July 2007

Achondrite (brachinite)

History: Purchased by Greg Hup? in July 2007 from a dealer in Tagounite,
Morocco.

Physical characteristics: Two dense, dark brown, broken rounded stones (2891
g and 206 g) with weathered fusion crust on some original exterior surfaces
and thin desert varnish coatings on hackly broken surfaces.

Petrography: (A. Irving and S. Kuehner, UWS) Coarse-grained rock (mostly
0.2-0.8 mm) with protogranular texture, composed predominantly of olivine
with subordinate green, Cr-bearing diopside, K-poor plagioclase, chromite,
iron sulfide, and kamacite (partially altered to iron hydroxides).
Plagioclase is interstitial to mafic silicates and is heterogeneous in
distribution. Very fine-grained (2-10 ?m), polyphase assemblages composed
mostly of orthopyroxene, Ni-bearing pyrrhotite and Ni-free metal with
variable amounts of fayalite and chromite occur around larger pyrrhotite
grains within olivine, and also as small, isolated apparent inclusions
within olivine.

Geochemistry: Olivine (Fa35.0-35.2, FeO/MnO = 70.9-71.3), clinopyroxene
(Fs9.3Wo47.1, FeO/MnO = 38.6, Cr2O3 = 0.76wt%, Al2O3 = 1.05 wt%),
plagioclase (An32.1- 37.6Or0.3-0.5), chromite [Cr/(Cr + Al) = 0.717, Mg/(Mg
+ Fe) = 0.239, TiO2 = 0.71 wt%, ZnO = 0.30 wt%]. Oxygen isotopes: (D.
Rumble, CIW) Replicate analyses of acid-washed silicate material by laser
fluorination gave, respectively, ?18O = 2.064, 2.095; ?17O = 4.368, 4.455;
?17O = -0.234, -0.248 per mil.

Classification: Achondrite (brachinite).

Specimens: A total of 20.4 g of sample and one polished thin section are on
deposit at UWS. GHup? holds the main mass (actually now in a private
collection).



I sent this to a professional cutter who used a wire saw and cut these at
3mm thick and polished to a high luster. If you want a large museum quality
specimen at an even BETTER rate, be sure to contact me off list.



I have already placed over half of this material into large collections,
which only leaves 15 slices and the 206g fragment. Half are the larger
slices like the one featured above.



Best regards,
Greg

====================
Greg Hupe
The Hupe Collection
NaturesVault (eBay)
gmhupe at htn.net
www.LunarRock.com
IMCA 3163
====================
Click here for my current eBay auctions:
http://search.ebay.com/_W0QQsassZnaturesvault



----- Original Message -----
From: "drtanuki" <drtanuki at yahoo.com>
To: <STARSANDSCOPES at aol.com>; <meteorite-list at meteoritecentral.com>
Sent: Monday, December 01, 2008 7:38 PM
Subject: Re: [meteorite-list] NEW Olivine Diogenite - NWA 4223 - AD


> Hello Tom and List,
> I would suggest that you check out the fantastic NWA 5471 brachinite that
> Martin and Stefan are selling for a VERY REASONABLE price; more than 2
> grams of the material instead of a thin section (you can make your own
> thin sections- several).
>
> Thank you Martin and Stefan for your very generous price for such a rare
> classification.
>
> Dirk Ross...Tokyo
> http://www.meteoritesjapan.com
> http://www.insekijapan.com
>
>
>
> --- On Tue, 12/2/08, STARSANDSCOPES at aol.com <STARSANDSCOPES at aol.com>
> wrote:
>
>> From: STARSANDSCOPES at aol.com <STARSANDSCOPES at aol.com>
>> Subject: Re: [meteorite-list] NEW Olivine Diogenite - NWA 4223 - AD
>> To: meteorite-list at meteoritecentral.com
>> Date: Tuesday, December 2, 2008, 9:23 AM
>> Hi list members, For those who are interested in thin
>> sections. Greg has
>> been kind enough to (previously) lend me the NWA 3151
>> Brachinite that he has
>> for sale. My micrograph article in Meteorite Times
>> December is on this thin
>> section.
>>
>> I felt obliged to say it is a wonderful sample prepared
>> splendidly! I
>> worked with it up to a magnification of 760X with great
>> results. If you are
>> thinking of adding a thin to your collection, I would
>> recommend this one and check
>> out the article. Bernd Pauli has provided me with three
>> excellent wide
>> field cross polarized light micrographs that are also
>> included.
>>
>> Tom Phillips
>>
>> In a message dated 12/1/2008 4:36:02 P.M. Mountain
>> Standard Time,
>> gmhupe at htn.net writes:
>> Dear List Members,
>>
>> It is my pleasure to announce a NEW Olivine Diogenite, NWA
>> 4223, the third
>> member of this exclusive group. It took me three years to
>> get to this point
>> of first public offering so you know the science has been
>> done! It has a TKW
>> of just 329 grams and is very course-grained. I managed
>> through eBay's site,
>> so you can find all of the available material and
>> "Official" classification
>> of NWA 4223 with the "Buy it Now" feature here:
>>
>> http://search.ebay.com/_W0QQsassZnaturesvault
>>
>> In addition to these rare specimens, I have also listed
>> these, most at
>> reduced prices for the holidays:
>> NWA 1878 Mesosiderite (Fantastic etch!)
>> NWA 1879 Mesosiderite
>> NWA 2932 Mesosiderite
>> NWA 869 L4-6 1kg Lot
>> NWA 3118 CV3 100g Lot
>> NWA 3151 Brachinite Thin Section
>> NWA 4528 H5 500g Lot
>> Unclassified 2kg Lot
>> Chergach Individual 92.1g (99% crusted)
>> Chergach Individual 64.1g (100% crusted)
>> Gao Individual 154g (from Haag Collection)
>> Glorieta Pallasite Individual 13.7g
>> Muonionalusta End Cut 76.9g (starts at just 99 cents)
>>
>> Thank you for checking out what I have to offer, I
>> appreciate it!
>>
>> Best regards,
>> Greg
>>
>> ====================
>> Greg Hupe
>> The Hupe Collection
>> NaturesVault (eBay)
>> gmhupe at htn.net
>> www.LunarRock.com
>> IMCA 3163
>> ====================
>> Click here for my current eBay auctions:
>> http://search.ebay.com/_W0QQsassZnaturesvault
>>
>>
>>
>>
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Received on Mon 01 Dec 2008 08:18:27 PM PST