Ha
And here's my modest specimen ;-)
http://www.woreczko.pl/meteorites/news/JbiletWinselwan.htm
Best
Woreczko
----- Original Message -----
From: "Michael Farmer" <[email protected]>
To: "karmaka" <[email protected]>
Cc: "met-list" <[email protected]>
Sent: Wednesday, August 21, 2013 5:55 PM
Subject: Re: [meteorite-list] Jbilet Winselwan
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" <[email protected]>
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
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