[meteorite-list] Jbilet Winselwan

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Wed, 21 Aug 2013 11:58:54 -0400
Message-ID: <CAKBPJW9awaYbtF3vuRBzNtJ5QLsGhG4NKdWdBDYOYgcGB2N_6w_at_mail.gmail.com>

Martin, you beat me by about 5 minutes! :)

List, this must be a wonderful CM2, because it garnered two
announcements in five minutes. :)

Count me in as officially on the lookout for some small crumbs of this
one - contact me off-list if you have some available.

Best regards,

MikeG

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On 8/21/13, Michael Farmer <mike at meteoriteguy.com> wrote:
> I have plenty of it. Great fresh CM2.
> For sale now. Fragments for .1 gram up to ~60 grams.
> Michael Farmer
>
> Sent from my iPhone
>
> On Aug 21, 2013, at 8:49 AM, "karmaka" <karmaka-meteorites at t-online.de>
> wrote:
>
>> Dear list members,
>>
>>
>> Jbilet Winselwan (CM2)
>>
>> is official now:
>>
>> http://www.lpi.usra.edu/meteor/metbull.php?code=57788
>>
>>
>>
>> Jbilet Winselwan        26?40.044?N, 11?40.637?W
>>
>> Morocco/Western Sahara
>>
>> Found: 24 May 2013
>>
>> Classification: Carbonaceous chondrite (CM2)
>>
>> History: (H. Chennaoui Aoudjehane, M. Aoudjehane, A. Laroussi, A.
>> Bouferra) In early June 2013, A. Bouferra, a meteorite hunter from Smara,
>> reported a new carbonaceous chondrite that had been found close to Smara.
>> Due to its proximity to Smara (7 km), many meteorite hunters visited the
>> area in the summer of 2013.
>>
>> Physical characteristics: Total mass is estimated about 6 kg, with small
>> and complete pieces between 3 and 10 g, a few medium-sized pieces 10 to
>> 200 g and rare big pieces >200 g. The largest sample is ~900 g. Fresh
>> looking fusion is crust present on many fragments. Some fragments are wind
>> ablated. Some cracks contain secondary, crystalline alteration products.
>> Interior of stones is black and peppered with chondrules.
>>
>> Petrography: (R. Hewins, MNHNP, L Garvie, ASU). The meteorite contains
>> chondrules and fragments of Types I and II. These include BO-PO, formerly
>> metal-rich, and olivine-pyroxene Type I chondrules. Type II chondrules
>> with forsterite relict grains are present. There are regions packed with
>> chondrule material and coarse PCP, and zones with scattered chondrule
>> material in fine-grained matrix. Chondrule sizes range up to 1.2 mm,
>> though most are around 200 ?m. A few CAIs are 800 ?m. Powder x-ray
>> diffraction shows a strong 0.7 nm peak for serpentines, a broad but weaker
>> peak around 1.3 nm corresponding to smectites, and a weak broad peak
>> consistent with tochilinite.
>>
>> Geochemistry: (R. Hewins, MNHNP) Olivine is Fa0.98?0.44 and Fa25-40.
>> Pyroxene is Fs2.6?1.5 and Fs40-61. Rare kamacite with 5.8 wt% Ni is
>> present. (P. Cartigny, IPGP) The oxygen isotopic compositions of two
>> pieces were determined as ?18O 3.811?0.09 and 5.851?0.016, ?17O
>> -2.446?0.040 and -0.601?0.026, respectively. ?17O values are -4.441 and
>> -3.663, mean -4.052.
>>
>> Classification: The oxygen isotope compositions, petrography and mineral
>> compositions are all consistent with CM2
>>
>> Specimens: 17.8 g MNHNP, 17.4 g FSAC provided by L. Labenne, 20 g UNM
>> provided by G. Fujihara, 122 g ASU provided by Farmer. Other collection
>> masses include: Farmer 2.6 kg, Labenne 1.6 kg, T. Jakobowski 512 g, G.
>> Fujihara 358 g, M. Ouzillou 173 g.
>>
>> Best regards
>>
>> Martin
>>
>>
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Received on Wed 21 Aug 2013 11:58:54 AM PDT