[meteorite-list] Jbilet Winselwan

From: Galactic Stone & Ironworks <*meteoritemike_at_meteoritecentral.com*> Date: Wed, 21 Aug 2013 12:13:09 -0400 Message-ID: <CAKBPJW_WVSBbDZqjVs197-wyeCCets=9Xbr1vz964=99AzVYNQ_at_mail.gmail.com> · meteoritemike_at_meteoritecentral.com

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On 8/21/13, Michael Farmer <mike at meteoriteguy.com> wrote:
> It has a great name, worthy of such a fresh and rare type. One of the
> freshest cm2 meteorites I've seen, many pieces have velvety black crust some
> flow lines even. It is very fragile and most pieces shattered into
> fragments. Wind and sand did their work on exposed surfaces which polished
> them up. I actually wire saw cut some pieces and the interior is gorgeous.
> This is a must have for any carbonaceous collector.
> Michael Farmer
>
> Sent from my iPhone
>
> On Aug 21, 2013, at 8:58 AM, "Galactic Stone & Ironworks"
> <meteoritemike at gmail.com> wrote:
>
>> 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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