Does anyone have a photo of the 900g specimen? Martin Von: Michael Farmer <m...@meteoriteguy.com> An: karmaka <karmaka-meteori...@t-online.de> Cc: met-list <meteorite-list@meteoritecentral.com> Betreff: Re: [meteorite-list] Jbilet Winselwan Datum: Wed, 21 Aug 2013 17:55:52 +0200 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-meteori...@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 μm. A few CAIs are 800 μm. 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 δ18O 3.811±0.09 and 5.851±0.016, δ17O -2.446±0.040 and > -0.601±0.026, respectively. Δ17O 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 > > > ---------------------------------------------------------------- > Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und > endlich Platz für tausende Mails haben. > http://www.t-online.de/email-kostenlos > > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list
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