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Northwest Africa 10105
Basic information Name: Northwest Africa 10105
     This is NOT an official name: Discredited meteorite.
Abbreviation: NWA 10105
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 150 g
Recommended:  CV3    [explanation]

Comments: Entered 13 Mar 2018
Revised 25 Jun 2019: Same meteorite as NWA 8616
Writeup from MB 107:

Northwest Africa 10105 (NWA 10105)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Carbonaceous chondrite (CV3)

Physical characteristics: The studied mass of 32 g (the type specimen) shows rather large chondrules and some relatively large white inclusions.

Petrography: In thin section, many chondrules of various kinds (BO, PO, POP; about 1 mm in apparent diameter), fine-grained, olivine-rich aggregates and CAIs are embedded in a fine-grained, dark brown matrix (roughly 40 vol%). The matrix is quite porous and rich in olivine. Fe,Ni-rich metal and troilite are less abundant; severe weathering has replaced about 50% of the metal by terrestrial weathering products. The shock stage is S2 due to the undulatory extinction and the lack of planar fractures in olivine.

Geochemistry: Chondrule olivine (mostly Fo95-100) total range Fo75.7-99.7, mean value Fo94.1±5.1, n=37; mean matrix olivine Fo45.3±2.7, n=20 analyses; chondrule low-Ca pyroxene (mostly Fs2-5) range: EnFs0.7-4.1Wo0.3-3.3, mean value En97.3±1.3, n=21.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2013 Feb
Mass (g):150
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):5.9±5.1
Ferrosilite (mol%):2.7±1.3
Classifier:M. Chaussidon, IPG; M. Weyrauch and A. Bischoff, IfP
Type spec mass (g):32
Type spec location:IPGP
Main mass:Luc Labenne
Comments:Submitted by Marc Chaussidon
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
IPGP: Institute de Physique du Globe de Paris, 1 rue Jussieu, 75252 Paris, Cedex 05, France (institutional address; updated 3 Nov 2014)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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